How is age calculated?

The calculator uses calendar math: the year count increments only on or after your birthday, not on a rolling 365.25-day basis. Months and days are calculated from the most recent completed month and day.

What happens if I was born on 29 February?

In non-leap years your birthday is treated as 1 March for the next-birthday countdown, which matches how most legal systems handle leap-day birthdays.

Does the calculator account for timezones?

It uses your local timezone. The "now" reference is read from your system clock, so make sure your OS time and timezone are correct if the live seconds look off.

Is my birth date stored anywhere?

No. The calculator runs entirely in your browser and does not persist the input between visits.

Age Calculator

Calculate your exact age and see how long until your next birthday.

Date of birthYYYY-MM-DD

Enter as year, month, day (e.g. 1995-03-17).

Countdown Timer

Set a timer for any duration. Get an alert when time is up.

Stopwatch

Precise stopwatch with lap tracking and millisecond accuracy.

Timezone Converter

Convert times between any IANA timezones with DST awareness.

Pomodoro Timer

Work in focused intervals with automatic break scheduling.

World Clock

Track the current time in multiple cities at a glance.

Unix Timestamp Converter

Convert Unix epoch timestamps to dates and back, in seconds or milliseconds.

Date Calculator

Add or subtract from a date, or measure the duration between two dates.

Interval Timer (HIIT)

Run work/rest intervals for HIIT, Tabata, and circuit workouts.

Alarm Clock

Set multiple alarms with labels, audio, and desktop notifications.

Meeting Planner

Find the best meeting time across timezones on a 24-hour overlap grid.

Sunrise & Sunset

Calculate sunrise, sunset, twilight, and golden hour for any location.

Chess Clock

Two-player chess clock with Fischer increment and Bronstein delay.

More time tools