How big will your puppy get?
Free calculators for puppy and dog owners. Every answer comes as a range, so you can see how sure it is, and when to call your vet.
- Toy under 12 lb
- Small 12–24 lb
- Medium 24–57 lb
- Large 57–99 lb
- Giant 99 lb and up
Built on published veterinary references, including AAHA, WSAVA, the Merck Veterinary Manual and the AKC breed weight chart. PupRange isn’t affiliated with any of them.
All calculators
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Puppy weight calculator
Adult weight as a range, by breed size and age
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Puppy growth chart
Plot weigh-ins against growth curves
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Dog pregnancy calculator
Due-date window and what to expect each week
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Dog age calculator
Human-years range and life stage, by size
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Puppy feeding chart
Meals per day and portions by age
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Chocolate toxicity calculator
Risk level by chocolate type, amount and dog weight
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Dog food calculator
Daily calories and cups, by weight and activity
How to read a result
Most calculators give one number. We show the range most dogs like yours fall into, the single most likely value, and what the usual shortcut would have said.
Illustration only, not a real estimate.
- Green band
- Where most puppies like yours end up.
- Dot
- The single most likely value.
- Dashed line
- What the usual straight-line shortcut would say. We show it so you can compare, and explain why it’s off.
Plain-English guides
All guides-
How long is a dog a puppy?
Puppyhood ends at different times for the body, for puberty and for behavior. Ages by size, the 8-month teenage phase, and what changes when it ends.
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Dog pregnancy week by week
Dog pregnancy week by week, from vet sources: when tests work, when to feed more, the temperature drop before labor, and when to call the vet.
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Dog years to human years, by size
A dog years to human years chart for small, medium, large and giant dogs, year by year, with the vet rule, the DNA clock and why ×7 is wrong.
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How big will my puppy get?
How big will your puppy get? We test the common online rules against growth curves by size and show when each one over- or underestimates.
Where the numbers come from
Growth estimates use size classes from Montoya and colleagues (2023). Our toy and large growth curves are fitted to published growth studies; the small, medium and giant curves are our estimates between them, and the methodology page says so for each one. Body condition follows the WSAVA 9-point chart. Feeding and calorie tools follow AAHA’s 2021 nutrition guidelines, and the chocolate tool uses dose thresholds from the Merck Veterinary Manual.