Calculators

Price before tax plus a combined state/local rate—tax amount and total, in your browser.

Percent of a number, what percent one value is of another, and percent change—client-side.

Age from a birth date to today or a chosen date—years, months, and days.

Original price and discount percent—amount saved and sale price, locally.

Subtotal, tip %, optional sales tax on the check, and per-person totals—split the bill.

Principal, APR, and term—estimated monthly payment and total interest (amortizing loan).

Lump sum, APR, years, and compounding—future value, interest earned, and APY in your browser.

Revenue and cost—gross profit, margin on revenue, and markup on cost.

Days between two calendar dates—useful with timestamps and planning.

Length, temperature, and weight—metric and US customary; paste one value, see all units in the column.