Free time & date tools

Eight free tools. No signup, no ads in your way — everything runs in your browser.

Time Duration Calculator

The exact time between two times or dates — handles overnight automatically

Add up shifts with breaks; decimal hours and gross pay for payroll

Live open/closed status for 10 major exchanges in your timezone

Any two places, with automatic daylight-saving handling

Minutes to decimal (and back) with the full payroll chart

Hours slept, plus bedtimes that fit 90-minute sleep cycles

Count down to any date — then share it with a link

Five clock-math questions a day, with an arcade-style leaderboard

Practical articles on work hours, payroll time math, and timezones