Online stopwatch. Easy to use and accurate stopwatch with lap times and alarms. Optional split intervals and alarm sound.

Timer online with alarm. Create one or multiple timers and start them in any order.

The Date Calculator adds or subtracts days, weeks, months and years from a given date.

Calendars – online and print friendly – for any year and month and including public holidays and observances for countries worldwide.

Create a Countdown Timer that counts down in seconds, minutes, hours and days to any date, with time zone support. It also counts …

Online Stopwatch Time your activities. With start alerts, lap times, and alarm sound.

Business Days Calculator counts the number of days between two dates, with the option of excluding weekends and public holidays.

Calculate local times for sunrises, sunsets, meridian passing, Sun distance, altitude and twilight, dusk and dawn times.

Is there a meteor shower tonight? Find out how and where to see shooting stars in 2026/27. What time is the meteor shower most …

Free, simple online stopwatch with start alerts, lap times, and sounds. Time your activities and save your timings in a text file.