Jack Russell Terrier Age in Human Years: Free Calculator
Work out your Jack Russell Terrier age in human years. Jack Russell Terriers typically weigh 13–17 lb and live 13–16 years; enter your dog's age below.
A small, very energetic terrier. Size class: Small (under 20 lb (9 kg)). Senior from about 11 years.
Jack Russell Terrier key numbers
| Typical adult weight | 13–17 lb (5.9–7.7 kg) |
| Typical lifespan | 13–16 years |
| Fully grown (adult) from about | 1 year |
| Senior from about | 11 years (≈60 human years) |
| Human age at 16 years | ≈80 |
| Daily calories, neutered adult | 424–518 kcal |
Jack Russell Terrier age in human years: year-by-year chart
| Dog age | Size-based chart | UCSD formula | Life stage |
|---|---|---|---|
| 1 | 15 | 31 | Adult |
| 2 | 24 | 42 | Adult |
| 3 | 28 | 49 | Adult |
| 4 | 32 | 53 | Adult |
| 5 | 36 | 57 | Adult |
| 6 | 40 | 60 | Adult |
| 7 | 44 | 62 | Adult |
| 8 | 48 | 64 | Adult |
| 9 | 52 | 66 | Adult |
| 10 | 56 | 68 | Adult |
| 11 | 60 | 69 | Senior |
| 12 | 64 | 71 | Senior |
| 13 | 68 | 72 | Senior |
| 14 | 72 | 73 | Senior |
| 15 | 76 | 74 | Senior |
| 16 | 80 | 75 | Senior |
| 17 | 84 | 76 | Senior |
Feeding a Jack Russell Terrier
At a typical adult weight of 15 lb (7 kg), a neutered adult needs roughly 472 kcal a day. Use the dog food calculator for your dog's own weight and food.
Frequently asked questions
How old is a Jack Russell Terrier in human years?
A Jack Russell Terrier's age in human years depends on size. A Jack Russell Terrier is a small breed (13–17 lb), so on the size-based chart it is about 36 human years at 5 and 56 at 10. A typical Jack Russell Terrier lifespan of 13–16 years is about 74 human years at the midpoint.
How long do Jack Russell Terriers live?
Typically 13 to 16 years. A small, very energetic terrier.
When is a Jack Russell Terrier a senior?
From around 11 years old, which is the last quarter of a typical lifespan. Ask your vet about senior check-ups before then.
Other small breeds
See all breeds · General dog age calculator