Fish Age Calculator
Quick answer: A 1-year-old fish is approximately 15 human years old. After the first year, aging varies by species — goldfish age about 4 human years per year, while betta age about 6. Our formulas provide estimates based on typical lifespans.
Fish Age Calculator
How Fish Aging Works
- •First year: ~15 human years
- •Goldfish: +4 human years per year
- •Betta: +6 human years per year
- •Tropical: +3 human years per year
- •Koi: +5 human years per year
Source: Veterinary aquatics guidelines
Frequently Asked Questions
How do I calculate my fish's age in human years?
Select your fish type, enter their age in years, and click "Calculate Human Age."
How long do goldfish live?
Goldfish can live 10-15 years with proper care, and some have lived over 20 years.
Does this calculator replace veterinary advice?
No. Our calculator is an educational tool. For health concerns, consult a qualified aquatic veterinarian.