Everyday Math calculators
Fast, accurate calculators for percentages, tips, hours, ages and dates.
Percentage Calculator
Four quick calculators in one: percent of a number, what percent X is of Y, percentage change, and adding or subtracting a percentage.
Updated Nov 1, 2026
Tip Calculator
Work out the tip, the total and each person's share in seconds — with an up-to-date U.S. and Canadian tipping guide.
Updated Nov 1, 2026
Age Calculator
Find your exact age in years, months and days, the weekday you were born, your next birthday countdown, and the time between any two dates.
Updated Nov 1, 2026
Hours & Time Card Calculator
Add up the hours you worked each day — with breaks, overnight shifts and overtime — and see your weekly total and gross pay.
Updated Nov 1, 2026