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Quick Links: Table of Contents
- Jack Russell Terrier Growth
- Jack Russell Terrier Weight and Growth Chart
- When do Jack Russell Terriers Stop Growing and How Big Do They Get?
- Jack Russell Terrier Growth Calculator
- How Much Should a Jack Russell Terrier Weigh?
- What is the Height of the Jack Russell Terrier?
- Is Your Jack Russell Terrier Growing Normally? This is How to Tell
- How to Measure the Weight of your Jack Russell Terrier
- How Fast Do Jack Russell Terriers Grow? Jack Russell Terrier Growth Rate
- Size of Male Jack Russell Terrier Versus Size of Female Jack Russell Terrier
- Male Jack Russell Terrier Weight and Growth Chart
- Female Jack Russell Terrier Weight and Growth Chart
- Jack Russell Terrier Growth Stages
- Male Jack Russell Terrier Weight/Growth Chart in KG
- Female Jack Russell Terrier Weight/Growth Chart in KG
- How Much Should a 12-Week-old Jack Russell Terrier Weigh?
- How Much Should a 4-Month-old Jack Russell Terrier Weigh?
- How Much Should a 6-Month-old Jack Russell Terrier Weigh?
- How Much Should a 1-Year-old Jack Russell Terrier Weigh?
- How to Tell If Your Jack Russell Terrier is Overweight
- Conclusion on Jack Russell Terrier Weight and Growth
Jack Russell Terrier Growth
Did you just get the Jack Russell Terrier puppy? And do you want to know when your Jack Russell Terrier will stop growing and how big your Jack Russell Terrier will get? Or do you want to know if your Jack Russell Terrier is of the ideal weight for its age?
In this article, we will answer all these relevant questions related to Jack Russell Terrier growth and weight.
If you do not own the Jack Russell Terrier yet, make sure you purchase your Jack Russell Terrier from an reputable Jack Russell Terrier breeder. Also, check out our Jack Russell Terrier buying guide and Jack Russell Terrier price guide here.
You can also work with a reputable rescue to adopt a puppy.
It is important for you as a caring Jack Russell Terrier owner to know if your Jack Russell Terrier is growing normally and that your Jack Russell Terrier is not overweight or underweight.
Extensive research studies have shown that most dogs are overweight because their owners spoil them with food, treats, and easy life styles. Most dogs eat way too much and do not get enough exercise. Research has also shown that one of the reasons many dogs die young is because they are overweight. However, you can extend your dog`s life by making sure your dog is of healthy weight and growth.One final reason to keep track of your Jack Russell Terrier`s weight and growth is that your Jack Russell Terrier`s weight and growth pattern can tell you if your Jack Russell Terrier has some underlying health conditions (such as bone, heart, hormone diseases). This is what recent research has shown.
This article contains the Jack Russell Terrier growth calculator that you can use to predict your Jack Russell Terrier`s adult weight. This article also contains the Jack Russell Terrier growth chart and weight calculator that you can use to approximately tell if your Jack Russell Terrier`s weight is in the normal range.
However, the more accurate method to predict and track normal growth in your Jack Russell Terrier is by regularly weighing your Jack Russell Terrier and recording the weight of your Jack Russell Terrier with our free dog weight tracker and weight predictor. Our tool will tell you, first, a more accurate future weight of your Jack Russell Terrier and, second, if your Jack Russell Terrier is growing normally.
We designed our dog weight tracker and weight predictor based on a recent research study carried out by researchers from Banfield Pet Hospitals and the University of Liverpool. This study collected and analyzed the weight of over 6 million healthy dogs in the United States. The dogs studied included dogs in the Jack Russell Terrier weight category.
Also, check out our Jack Russell Terrier food calculator here to know how much food to feed your Jack Russell Terrier based on your Jack Russell Terrier`s weight and age.
Jack Russell Terrier Weight and Growth Chart
Below is the typical growth chart and weight chart of Jack Russell Terriers at different stages in their lives.
Note that your Jack Russell Terrier may be slightly heavier or lighter than what the chart says. The weight chart is an average weight chart.
Also, this growth chart is the combined growth chart of the male and female Jack Russell Terrier.
To know how much food to feed your Jack Russell Terrier at different ages and weights, check out our Jack Russell Terrier feeding guide and calculator.
To know how much water your Jack Russell Terrier needs to drink at different ages and weights, check out our Jack Russell Terrier water drinking guide and calculator.
Note that the growth pattern of a female Jack Russell Terrier can be slightly different from the growth pattern of a male Jack Russell Terrier
. Therefore, later on in this article, we will provide you with the gender-specific growth chart for the male and for the female Jack Russell Terrier.| Age | Average Weight | Typical Weight Range |
|---|---|---|
| 15 Weeks | 8 LBS | 7 LBS – 9 LBS |
| 20 Weeks | 11 LBS | 9 LBS – 12 LBS |
| 25 Weeks | 13 LBS | 11 LBS – 14 LBS |
| 30 Weeks | 14 LBS | 12 LBS – 15 LBS |
| 35 Weeks | 15 LBS | 13 LBS – 16 LBS |
| 40 Weeks | 15 LBS | 13 LBS – 17 LBS |
| 45 Weeks | 15 LBS | 13 LBS – 17 LBS |
| 60 Weeks | 16 LBS | 14 LBS – 18 LBS |
When do Jack Russell Terriers Stop Growing and How Big Do They Get?
Your Jack Russell Terrier will grow very fast in its first 36 weeks. At 36 weeks, your Jack Russell Terrier will have reached 95 percent of its adult weight. Then your Jack Russell Terrier will slowly stop adding more weight. At around 45 weeks (~11 months), your Jack Russell Terrier should be at its maximum weight. Jack Russell Terriers stop growing at 45 weeks (~11 months).
The above discussion is general, and it applies to both male and female Jack Russell Terriers. However, male dogs usually grow at a different rate compared to female dogs
A male Jack Russell Terrier will grow very fast in its first 36 weeks. At 36 weeks, a male Jack Russell Terrier will have reached 95 percent of its adult weight at 36 weeks. A male Jack Russell Terrier will then slowly stop adding more weight. At around 45 weeks (~11 months), a male Jack Russell Terrier should have reached its maximum weight. Male Jack Russell Terriers stop growing at 45 weeks (~11 months).
Similarly, a female Jack Russell Terrier will grow very fast in its first 36 weeks. At 36 weeks, a female Jack Russell Terrier will have reached 95 percent of its adult weight at 36 weeks. A female Jack Russell Terrier will then slowly stop adding more weight. At around 45 weeks (~11 months), a female Jack Russell Terrier should have reached its maximum weight. Female Jack Russell Terriers stop growing at 45 weeks (~11 months).
See the growth graph of a Jack Russell Terrier below.
As you can see in the Jack Russell Terrier growth curve below, the Jack Russell Terrier grows really fast in its early weeks, and then its growth levels off till it reaches 100 percent of the adult weight.
Jack Russell Terrier Growth Calculator
Use the calculator below to estimate how big your Jack Russell Terrier will get based on its current weight.
This Jack Russell Terrier growth calculator is based on the typical weight curve of a Jack Russell Terrier shown above. The calculator assumes that your Jack Russell Terrier is growing normally, and not on its way to become overweight or underweight.
How Much Should a Jack Russell Terrier Weigh?
Adult Jack Russell Terriers typically weigh between 13 to 17 pounds.
Above is a graph that shows how much a Jack Russell Terrier should weigh at different ages. Check where the weight of your Jack Russell Terrier falls in the graph for its age.
It is totally fine if the weight of your Jack Russell Terrier falls in either the dark green or light green region of the graph. However, weight in the dark green region is more typical for Jack Russell Terriers.
If the weight of your Jack Russell Terrier falls outside both the dark and light green region for its age, then you should consult a vet.
Also, you can use the Jack Russell Terrier weight calculator below to find the typical weight and the normal weight range of Jack Russell Terriers, male or female, of any age between 12 weeks and 100 weeks.
If you want to see how the weight of your Jack Russell Terrier compares to that of other Jack Russell Terrier`s of its age, enter the weight of your Jack Russell Terrier in the calculator, and the calculator will show you where your Jack Russell Terrier stands on the weight chart.
The calculator will also tell you if your Jack Russell Terrier is within the normal weight range for the Jack Russell Terrier.
This Jack Russell Terrier weight calculator uses information from belpatt.fr and data from a research study on dog weight carried out by researchers at the University of Liverpool.
Please, talk to your vet before taking any decision on your pet`s weight and health.
What is the Height of the Jack Russell Terrier?
The adult Jack Russell Terrier is 10 to 15 inches tall at the shoulder. This is the average adult height of the Jack Russell Terrier.
Is Your Jack Russell Terrier Growing Normally? This is How to Tell
Puppy growth predictors, growth charts, and growth calculators like the ones above are approximate methods for predicting growth in dogs. However, these tools have limited capabilities. This is because each dog is unique and a dog`s growth may be different from that of the overall dog population.
A more accurate and scientific way to predict a dog`s growth is to measure the dog`s weight every week and record the weight. Doing this with your Jack Russell Terrier will give you a clearer picture of how your Jack Russell Terrier is growing.
You can use our free tool to track your Jack Russell Terrier`s growth and weight over time. Our tool will also let you know if your Jack Russell Terrier is growing normally.
Tracking your Jack Russell Terrier`s weight will let you see the unique growth trajectory of your Jack Russell Terrier. You can use this growth trajectory to accurately predict how big your Jack Russell Terrier will get. The growth trajectory will also let you know very early if your Jack Russell Terrier will become overweight or underweight.
Monitoring your dog`s weight is important because pet obesity is one of the leading causes of premature death in dogs. And these days, pets gain weight very easily because their owners spoil them with lots of treats and food. Catching early abnormal weight in your dog and correcting it (through diet changes, exercise) can significantly extend your dog`s life.
Below is what a normal growth pattern and what abnormal growth patterns look like in Jack Russell Terriers. You can compare your Jack Russell Terrier growth trajectory against these references to see if your Jack Russell Terrier is growing normally or you can use our automatic tool.
How to Measure the Weight of your Jack Russell Terrier
There are two methods you can use to measure your Jack Russell Terrier`s weight.
The first method, which is the better and more accurate method to weigh your Jack Russell Terrier, is to use a dog weighing scale.
Using a dog scale is important if you would like to monitor your Jack Russell Terrier`s growth regularly to catch any abnormal growth early.
Having a scale for weighing your Jack Russell Terrier will make it easy for you to weigh your Jack Russell Terrier regularly without any trouble.
The scale that we recommend for weighing the Jack Russell Terrier is this high durability and affordable Greater Goods Digital Pet Scale. Click here to check out this scale on Amazon.
The second method is to use a bathroom scale to weigh yourself while holding your Jack Russell Terrier. Then use the same scale to weigh yourself without your Jack Russell Terrier. Then calculate your weight when holding your dog minus your weight when not holding your Jack Russell Terrier. This method is illustrated in the picture below.
However, note that this method of holding your dog on a scale is not very accurate, and it may be difficult for you to use this method to weigh your Jack Russell Terrier if your Jack Russell Terrier is very heavy or if your Jack Russell Terrier is the type that would not stay still while being held.
How Fast Do Jack Russell Terriers Grow? Jack Russell Terrier Growth Rate
Starting from 3 months of age, Jack Russell Terriers grow at a rate of 0.59 pounds per week (0.27 Kilograms per week) on average. Starting at 4 months, your Jack Russell Terrier will gain 0.47 pounds (0.21 Kilograms) every week on average.
At 5 months of age, your Jack Russell Terrier will grow at a rate of 0.36 pounds per week (0.17 Kilograms per week) on average. Then at 6 months, your Jack Russell Terrier will gain 0.28 pounds (0.13 Kilograms) every week on average.
See the growth rate chart of the Jack Russell Terrier below
| Age (Months) | Growth per week (Pounds) | Growth per week (Kg) |
|---|---|---|
| 3 Months | 0.59 | 0.27 |
| 4 Months | 0.47 | 0.21 |
| 5 Months | 0.36 | 0.17 |
| 6 Months | 0.28 | 0.13 |
| 7 Months | 0.20 | 0.09 |
| 8 Months | 0.15 | 0.07 |
Size of Male Jack Russell Terrier Versus Size of Female Jack Russell Terrier
The average size of a male Jack Russell Terrier is 15 pounds (7 kg) while the average size of a female Jack Russell Terrier is 15 pounds (7 kg).
In general, male dogs are usually bigger than female dogs.
Male Jack Russell Terrier Weight and Growth Chart
The growth pattern of Male dogs is also different from that of Female dogs.
Adult male dogs are generally bigger in size than adult female dogs.
Below is the typical growth and weight chart of a Male Jack Russell Terrier.
| Age | Average Weight | Typical Weight Range |
|---|---|---|
| 15 Weeks | 8 LBS | 7 LBS – 9 LBS |
| 20 Weeks | 11 LBS | 9 LBS – 12 LBS |
| 25 Weeks | 13 LBS | 11 LBS – 14 LBS |
| 30 Weeks | 14 LBS | 12 LBS – 15 LBS |
| 35 Weeks | 15 LBS | 13 LBS – 16 LBS |
| 40 Weeks | 15 LBS | 13 LBS – 17 LBS |
| 45 Weeks | 15 LBS | 13 LBS – 17 LBS |
| 60 Weeks | 16 LBS | 14 LBS – 18 LBS |
Female Jack Russell Terrier Weight and Growth Chart
The growth pattern of female dogs is different from that of male dogs. On average, female dogs grow faster than males and reach full size earlier. For this reason, it`s important that the standard height and weight charts for dogs are gender-specific.
Also, adult female dogs are generally smaller in size than adult male dogs.
Below is the typical growth and weight chart of a Female Jack Russell Terrier.
| Age | Average Weight | Typical Weight Range |
|---|---|---|
| 15 Weeks | 8 LBS | 7 LBS – 9 LBS |
| 20 Weeks | 11 LBS | 9 LBS – 12 LBS |
| 25 Weeks | 13 LBS | 11 LBS – 14 LBS |
| 30 Weeks | 14 LBS | 12 LBS – 15 LBS |
| 35 Weeks | 15 LBS | 13 LBS – 16 LBS |
| 40 Weeks | 15 LBS | 13 LBS – 17 LBS |
| 45 Weeks | 15 LBS | 13 LBS – 17 LBS |
| 60 Weeks | 16 LBS | 14 LBS – 18 LBS |
Jack Russell Terrier Growth Stages
Your Jack Russell Terrier will go through a number of developmental stages on its journey to adulthood. Your Jack Russell Terrier`s growth pattern can be categorized into 6 distinct stages: Neonatal, Transitional, Socialization Period, Juvenile Period, Adolescent Period, and Maturity.
You can know the developmental stage of your Jack Russell Terrier based on how old your Jack Russell Terrier is.
1. Jack Russell Terrier Neonatal Period
Jack Russell Terrier Neonatal Period is from Birth to 2 weeks. During this stage, the Jack Russell Terrier puppy will be totally dependent on its mother. The Jack Russell Terrier puppy`s eyes will still be unopened with no sense of vision. The Jack Russell Terrier puppy will only have the senses of taste and touch
2. Jack Russell Terrier Transitional Period
Jack Russell Terrier Transitional Period is from 2 weeks to 3 weeks. During this stage, the Jack Russell Terrier puppy will continue to develop a better sense of hearing and taste. The puppy`s teeth will start coming through and its eyes will begin to open.
During this stage, the Jack Russell Terrier puppy begins to crawl forward and backward, begins to stand, begins to wag its tail. This is also the age where your puppy’s personality begins to develop.
3. Jack Russell Terrier Socialization Period
Jack Russell Terrier Socialization Period is from 3 weeks to 14 weeks. During this stage, the Jack Russell Terrier puppy will be able to fully use all of its senses (vision, smell, touch, hearing, taste), and the puppy will learn to survive without its mother.
Also during this stage, the Jack Russell Terrier puppy learns how to act like a dog (biting, chasing, barking, etc). The rapid learning and socialization of the puppy occur at this stage, and what the Jack Russell Terrier puppy learns in this stage will have a long-term effect on the puppy`s behavior as an adult.
4. Jack Russell Terrier Juvenile Period
Jack Russell Terrier Juvenile Period is from 3-4 Months to 5-14 months. During this stage, the Jack Russell Terrier puppies will attempt to clarify and resolve their boundaries. Their baby teeth start getting replaced by adult teeth.
5. Jack Russell Terrier Adolescent Period
Jack Russell Terrier Adolescent Period is from 5-14 Months to 2-3 Years. Jack Russell Terriers go through social and sexual maturity during this stage.
6. Jack Russell Terrier Maturity Period
Jack Russell Terrier Maturity Period is from 1 year to 4 years. At this age, your Jack Russell Terrier will transition to full adulthood.
Male Jack Russell Terrier Weight/Growth Chart in KG
The growth pattern of Male dogs is also different from that of Female dogs.
Adult male dogs are generally bigger in size than adult female dogs.
Below is typical growth and weight chart of a Male Jack Russell Terrier in Kilograms (kg).
| Age | Average Weight | Typical Weight Range |
|---|---|---|
| 15 Weeks | 4 KG | 3 KG – 4 KG |
| 20 Weeks | 5 KG | 4 KG – 5 KG |
| 25 Weeks | 5 KG | 5 KG – 6 KG |
| 30 Weeks | 6 KG | 5 KG – 7 KG |
| 35 Weeks | 6 KG | 6 KG – 7 KG |
| 40 Weeks | 7 KG | 6 KG – 7 KG |
| 45 Weeks | 7 KG | 6 KG – 8 KG |
| 60 Weeks | 7 KG | 6 KG – 8 KG |
Female Jack Russell Terrier Weight/Growth Chart in KG
The growth pattern of female dogs is different from that of male dogs. On average, female dogs grow faster than males and reach full size earlier. For this reason, it`s important that the standard height and weight charts for dogs are gender-specific.
Also, adult female dogs are generally smaller in size than adult male dogs.
Below is typical growth and weight chart of a Female Jack Russell Terrier in Kilograms (kg).
| Age | Average Weight | Typical Weight Range |
|---|---|---|
| 15 Weeks | 4 KG | 3 KG – 4 KG |
| 20 Weeks | 5 KG | 4 KG – 5 KG |
| 25 Weeks | 5 KG | 5 KG – 6 KG |
| 30 Weeks | 6 KG | 5 KG – 7 KG |
| 35 Weeks | 6 KG | 6 KG – 7 KG |
| 40 Weeks | 7 KG | 6 KG – 7 KG |
| 45 Weeks | 7 KG | 6 KG – 8 KG |
| 60 Weeks | 7 KG | 6 KG – 8 KG |
How Much Should a 12-Week-old Jack Russell Terrier Weigh?
The average weight of a 12-week-old female Jack Russell Terrier is 7.1 lbs (3.2 kg).
The typical weight range of a 12-week-old female Jack Russell Terrier is from 6.3 lbs to 7.8 lbs (2.8 kg to 3.6 kg).
The average weight of a 12-week-old male Jack Russell Terrier is 7.1 lbs (3.2 kg).
The typical weight range of a 12-week-old male Jack Russell Terrier is from 6.3 lbs to 7.8 lbs (2.8 kg to 3.6 kg).
However, a recent research study on dog weight shows that 12-week-old female Jack Russell Terriers can normally weigh as low as 2.3 lbs (1.1 kg) and as high as 9.3 lbs (4.2 kg)
Correspondingly, 12-week-old male Jack Russell Terriers can normally weigh as low as 2.4 lbs (1.1 kg) and as high as 10.7 lbs (4.9 kg)
How Much Should a 4-Month-old Jack Russell Terrier Weigh?
The average weight of a 4-month-old female Jack Russell Terrier is 9.4 lbs (4.3 kg).
The typical weight range of a 4-month-old female Jack Russell Terrier is from 8.4 lbs to 10.5 lbs (3.8 kg to 4.7 kg).
The average weight of a 4-month-old male Jack Russell Terrier is 9.4 lbs (4.3 kg).
The typical weight range of a 4-month-old male Jack Russell Terrier is from 8.4 lbs to 10.5 lbs (3.8 kg to 4.7 kg).
However, a recent research study on dog weight shows that 4-month-old female Jack Russell Terriers can normally weigh as low as 3.1 lbs (1.4 kg) and as high as 12.1 lbs (5.5 kg)
Correspondingly, 4-month-old male Jack Russell Terriers can normally weigh as low as 3.3 lbs (1.5 kg) and as high as 14.0 lbs (6.3 kg)
How Much Should a 6-Month-old Jack Russell Terrier Weigh?
The average weight of a 6-month-old female Jack Russell Terrier is 12.7 lbs (5.8 kg).
The typical weight range of a 6-month-old female Jack Russell Terrier is from 11.2 lbs to 14.2 lbs (5.1 kg to 6.4 kg).
The average weight of a 6-month-old male Jack Russell Terrier is 12.7 lbs (5.8 kg).
The typical weight range of a 6-month-old male Jack Russell Terrier is from 11.2 lbs to 14.2 lbs (5.1 kg to 6.4 kg).
However, a recent research study on dog weight shows that 6-month-old female Jack Russell Terriers can normally weigh as low as 4.2 lbs (1.9 kg) and as high as 16.1 lbs (7.3 kg)
Correspondingly, 6-month-old male Jack Russell Terriers can normally weigh as low as 4.8 lbs (2.2 kg) and as high as 18.7 lbs (8.5 kg)
How Much Should a 1-Year-old Jack Russell Terrier Weigh?
The average weight of a 1-year-old female Jack Russell Terrier is 16.1 lbs (7.3 kg).
The typical weight range of a 1-year-old female Jack Russell Terrier is from 14.1 lbs to 18.1 lbs (6.4 kg to 8.2 kg).
The average weight of a 1-year-old male Jack Russell Terrier is 16.1 lbs (7.3 kg).
The typical weight range of a 1-year-old male Jack Russell Terrier is from 14.1 lbs to 18.1 lbs (6.4 kg to 8.2 kg).
However, a recent research study on dog weight shows that 1-year-old female Jack Russell Terriers can normally weigh as low as 5.6 lbs (2.6 kg) and as high as 20.7 lbs (9.4 kg)
Correspondingly, 1-year-old male Jack Russell Terriers can normally weigh as low as 6.6 lbs (3.0 kg) and as high as 23.7 lbs (10.7 kg)
How to Tell If Your Jack Russell Terrier is Overweight
As mentioned earlier in this article, a very accurate way to know if your Jack Russell Terrier puppy is on its way to becoming overweight is by weighing your dog every week and recording its weight. This will show you the growth trajectory of your Jack Russell Terrier puppy. And a close look at your puppy`s growth trajectory will tell you if your Jack Russell Terrier puppy will be overweight or underweight. This method is relatively easy to use.
You can use our free online tool to track your Jack Russell Terrier puppy`s growth curve.
However, if you do not have a record of the weekly weights of your Jack Russell Terrier, and you want to tell if your dog is overweight, underweight, or of normal weight, then you can use a chart called the body condition chart shown below. This method requires some expertise to use, and it is further discussed below.
To tell your dog`s body condition, first, look at your dog closely and observe which of its bones and structures are sticking out or not sticking out from under its skin. Next, use your hands to feel for fat and bones over your dog. To know which bones to look and feel for, check out the body condition tool guide from the World Small Animal Veterinary Association and this guide. This exercise will tell you the body condition score for your dog.
Body condition scores are from a scale of 1 to 9. A score of 1, 2 or 3 means that a dog is too skinny. A score of 4 or 5 means that a dog is of ideal weight, and a score above 5 means that a dog is overweight.
Talk to your vet if your Jack Russell Terrier appears to be overweight. The vet might recommend reducing how much food to feed your Jack Russell Terrier.
Conclusion on Jack Russell Terrier Weight and Growth
In this article, we have provided you with the information, growth charts and growth calculators to help you tell how big your Jack Russell Terrier will get. These tools will also help tell if your Jack Russell Terrier is growing normally.
However, the best way to monitor and predict the growth of your Jack Russell Terrier is to measure and record your puppy Jack Russell Terrier`s weight every week.
Use our free Jack Russell Terrier weight tracker and calculator tool available here to track and predict your Jack Russell Terrier`s weight.
It is important that every Jack Russell Terrier owner monitors the growth of their Jack Russell Terrier for normal growth by checking the weight of their Jack Russell Terrier regularly. Regular weight monitoring will let you detect any abnormal growth very early before it is too late. We discussed how you can tell if your Jack Russell Terrier is growing normally from your Jack Russell Terrier`s weight history earlier in this article.
Abnormal growth in Jack Russell Terrier can be because of underlying disease (such are heart, hormonal, or bone problems) or because of overfeeding or underfeeding. All of the aforementioned reduce the Jack Russell Terrier lifespan and quality of life.
Don`t wait. Start tracking your Jack Russell Terrier`s weight today!