Tools

Time tools & calculators

Handy, precise utilities for everyday time questions — all free, all running right in your browser, with nothing to install.

Convert any date and time between cities, compare UTC offsets, scan a 24-hour table and find the best time to call.

Convert epoch seconds or milliseconds to readable dates, and turn dates in any time zone into timestamps.

Detect local times that are skipped or repeated during daylight-saving clock changes in any supported IANA zone.

Decode CST, IST, BST and other short labels, compare possible meanings, and identify dangerous ambiguity.

A precise stopwatch with lap splits and a countdown timer with presets and an alarm. Keeps running if you refresh.

Find your exact age in years, months and days — plus total weeks, hours and a countdown to your next birthday.

Find the exact span between two dates, or add and subtract years, months, weeks, calendar days and business days.

Add up hours between a start and end time, subtract breaks, and total a whole week — perfect for timesheets and pay.

A clean monthly calendar you can page through, with today highlighted and week numbers, day-of-year and countdowns for any date.

Count down to any date and time — holidays, birthdays, launches or the New Year — with live days, hours, minutes and seconds.

Add a free live clock for any city to your website, blog, Notion or email signature. Configure it and copy the code.