Sengupta (2013) Rat-Human Age Scaling
The piecewise model used by the calculator:
- Days 1–21 (pre-weaning): ~87 human days per rat day
- Days 21–42 (juvenile, weeks 3–6): ~139 human days per rat day
- Days 42–182 (young adult, 6 wk–6 mo): ~13 human days per rat day
- Days 182–365 (mature adult, 6–12 mo): ~24 human days per rat day
- Days 365–730 (middle-aged, 12–24 mo): ~30 human days per rat day
- Days >730 (senescent): ~25 human days per rat day
Key anchor points: rat 6 weeks ≈ human 13 years (puberty), rat 6 months ≈ human 18 years, rat 12 months ≈ human 30 years, rat 24 months ≈ human 60 years.