Math & Everyday

Find exact age in years, months, days and total days lived.

Solve percentage of, percentage change and reverse percentages.

What you actually pay after stacked discounts, coupons and tax.

Simplify a ratio, divide an amount by it, or solve a proportion.

Mean, median, mode and spread from any list of numbers.

Add, subtract, multiply and divide fractions — exactly, not in decimals.

Hours worked between two times, with breaks and overnight shifts handled.

The gap between two dates in years, months, days — and every other unit.

Working days between two dates, with your own week and holidays.

Count business days between dates, excluding weekends and holidays.

A live countdown to any date and time.

Work out a tip and split the bill, with an option to round it evenly.

Split a bill by what each person actually ordered, not by headcount.

How much to save each month for a goal — or what your saving will grow to.

Whether your corpus will actually fund your retirement, in real terms.