#calculator

Age in years, months, and days between two dates.

Simplify a ratio and scale to a target dimension.

BMI and weight category in metric or imperial.

Future value and interest earned from compounding.

Final price and savings from a percent-off discount.

Weighted 4.0-scale GPA from grades and credits.

Amortized monthly loan payment and total interest.

Percent of, percent-of-total, and percent change.

Check primality and list primes up to a limit.

Count, mean, median, mode, and stdev from a list.

Tip amount, total, and per-person bill split.

Add or remove VAT and see net/gross amounts.