Pets

How Old Is Your Dog in Human Years?

Built by Kevin Glover · @gloverbuilds · Verified formula

The "multiply by 7" rule is wrong. Calculate your dog's real human-equivalent age using the breed-adjusted logarithmic formula.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

Why "Multiply by 7" Is Wrong
When Is a Dog Considered Senior?
Maximizing Your Dog's Lifespan

A Conversão Real

A regra dos 7 anos é falsa. Os cachorros amadurecem rápido: 1 ano ≈ 15 anos humanos, 2 anos ≈ 24. Depois: 4-5 anos humanos por ano canino. Cachorros grandes envelhecem mais rápido: um Dogue Alemão de 7 é geriátrico; um Chihuahua de 7 está no auge.

Expectativa de Vida

Raças pequenas: 12-16 anos. Médias: 10-14. Grandes: 10-13. Gigantes: 6-10. No Brasil, os vira-latas (SRD) tendem a viver mais que raças puras de tamanho similar — o vigor híbrido reduz problemas genéticos.

⚡ CalcWolf Insight

A Purina Lifespan Study followed 48 Labrador Retrievers for their entire lives. Dogs kept at ideal body weight lived a median 1.8 years longer (13.0 vs 11.2 years) than dogs who were slightly overweight. This is the single most impactful thing owners can do for longevity.

Frequently asked questions

Meu cachorro de 5 anos tem quantos anos humanos?▾

Pequeno: ~36. Médio: ~38. Grande: ~40. Gigante: ~45.

A regra dos 7 anos é verdade?▾

Não. 1 ano = ~15 humanos. Após 2 anos: 4-5 humanos por ano canino.

✓ Math logic verified against primary sources → See our verification process

Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →