Pet age calculator (by species/breed)
- Human-equivalent age
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- Life-stage
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Modern non-linear formula for dogs and cats (closer to AAHA guidelines than the old "× 7" rule).
About this tool
Pet age calculator (by species/breed) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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