Hours, dates, and pay — the calculator apps for math that clocks and calendars make hard.
Updated June 2026 · All picks are free to download
Add, subtract, and convert hours and minutes without decimal-point headaches — timesheets, overtime, billable hours. The most complete time calculator on this list.
A focused timesheet calculator: clock-in, clock-out, breaks, and weekly totals — the fastest way from punch times to payable hours.
Days between dates, add or subtract workdays with your own workweek, and countdowns to the dates that matter. Everything calendar math, one app.
Hours × rate, done properly: enter your times and hourly pay, get the total with overtime handled — for freelancers and shift workers who invoice by the hour.
The bonus pick — not time, but the calculator people keep: percentages, discounts, tips, VAT, and margins in one tap. The most-rated app on this list by far.