Pet Age Calculator

Overview

The Pet Age Calculator maps your pet’s chronological age into a human‐equivalent age using species‐ and size‐specific conversion curves. Rather than a flat “7×” rule, it accounts for rapid early development and varying aging rates later in life.

Formula and Methodology

We use piecewise formulas:

• Dogs: \( A_h = \begin{cases} 15\,A_p, & A_p<1 \\ 15 + 9\,(A_p-1), & 1 \le A_p < 2 \\ 24 + M_{\rm size}\,(A_p-2), & A_p \ge 2 \end{cases} \)
• Cats: \( A_h = \begin{cases} 15\,A_p, & A_p<1 \\ 15 + 9\,(A_p-1), & 1 \le A_p < 2 \\ 24 + 4\,(A_p-2), & A_p \ge 2 \end{cases} \)
• Rabbits: \( A_h = \begin{cases} 12\,A_p, & A_p<1 \\ 12 + 5.5\,(A_p-1), & A_p \ge 1 \end{cases} \)

Here, \(A_p\) is pet age in years, and \(M_{\rm size}\) is the dog‐size multiplier (4.5–7).

Example

A 3-year, 4-month old medium dog (Labrador): \(A_p = 3 + \tfrac{4}{12} = 3.33\). First two years → 24 human years, Additional 1.33 years × 5 → 6.67, Total ≈ 30.7 ≈ 31 human years.

Frequently Asked Questions