Rabbit age estimate
The first rabbit year is multiplied by 21. Each later year adds 6. Body size does not change the result. The labels Baby, Adolescent, Adult, Mature, and Senior belong to this calculator.
Worked example · 4 rabbit years
39 human years, labeled Mature
Indoor lifespan on file is 8–12 years, from the House Rabbit Society page the age tool cites. A care protocol is not attached to this number.
Quick age estimate
A labeled estimate, not a veterinary conversion.