A red-throated diver aged 8 years 4 months is like a human aged 36 years 5 months

If a red-throated diver is 8 years 4 months old, that is like a human aged about 36 years 5 months (accuracy ±1 month 2 weeks). The calculation uses the average and maximum lifespans and the age of maturity of both species, so the ratio is not linear.

How old is a red-throated diver aged 8 years 4 months in human years?

About 36 years 5 months (accuracy ±1 month 2 weeks).

Why is the age not converted linearly?

Species age unevenly: childhood, maturity and old age take a different share of life, so the calculator matches the life stages of both species.

Can I choose another age or species?

Yes, the page has the calculator: pick the species, sex and age, and the result is recalculated.