Date & Time Tools
Stopwatches, countdowns, timers, and date calculators, instantly in your browser.
Age Calculator
Find your exact age in years, months, and days.
Stopwatch
A simple, accurate stopwatch with lap timing.
Date Calculator
Find days between two dates, or add/subtract days from a date.
Countdown Timer
Count down to any date and time perfect for events and launches.
Pomodoro Timer
Work in focused sessions with built-in breaks using the Pomodoro Technique.
Time Zone Converter
Convert a time between any two cities or time zones instantly.
Hours Calculator
Add up work shifts and breaks to get your total hours and pay.
Time Calculator
Add or subtract hours, minutes, and seconds across multiple values.
Military Time Converter
Convert between 24-hour military time and standard 12-hour AM/PM time instantly.
Choosing and using date & time tools
Use these tools to compare dates, total work periods, convert time zones, or run a stopwatch and countdown. Date and time calculations can be surprisingly tricky around midnight, daylight-saving changes, leap years, and different regional conventions, so each page explains how inputs are interpreted.
Tips for reliable results
Include the correct date and time zone when scheduling across locations, and verify important appointments in the recipients local time. Timesheet totals do not automatically determine overtime or payroll compliance. For employment records, compare the calculation with your employers rounding, break, and overtime policies.
Choose a tool above to see its inputs, method, privacy notes, examples, limitations, and answers to common questions. Related tools are linked on every page so you can continue a task without returning to search.