Pet Growth
Project adult weight and maturity for a growing puppy by breed size.
About Pet Growth
Growth is linearized to a maturity age per breed size, so current weight divided by that progress estimates adult weight. Knowing projected adult size guides feeding schedules, crate sizing and when to switch to adult food.
Formula
Pet Growth
Adult weight = current weight / growth fraction; fraction = age / maturity months
- maturity months
- Approximate age of adult size for the breed size
Worked example
With the default values below, Pet Growth returns Projected Adult Weight of 36.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Breed sizeone of Small breed, Medium breed, Large breed
- Large breed
- Ageaccepts 1–24 mo
- 6 mo
- Current weightminimum 0.5 kg
- 12 kg
Results
- Projected Adult Weight
- 36.0 kg
- Growth Complete
- 33.3%
- Months to Maturity
- 12.0 mo
- Note
- Large breeds keep growing until roughly 18 months
Step by step
- 1Values used
- 2Pet Growth
- 3Projected Adult Weight= 36.0 kg
- 4Growth Complete= 33.3
- 5Months to Maturity= 12.0 mo
- 6Note= Large breeds keep growing until roughly 18 months
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Pet Growth calculated?
Adult weight = current weight / growth fraction; fraction = age / maturity months Growth is linearized to a maturity age per breed size, so current weight divided by that progress estimates adult weight.
Why does Pet Growth matter?
Knowing projected adult size guides feeding schedules, crate sizing and when to switch to adult food.
What values do I need to enter?
This calculator takes 3 inputs: Breed size, Age, Current weight. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.