Time tools
Free online time and date tools that run entirely in your browser. Convert Unix timestamps and time zones, calculate durations and date differences, parse cron expressions, and work out ages instantly. Private, accurate, and free.
All time tools
Add or Subtract Days from a Date
Add or subtract days, weeks, months, or years from any date.
Age Calculator
Work out an exact age in years, months, and days from a birthdate, with a countdown to the next birthday.
Business Days Calculator
Count the working days between two dates, minus weekends and any holidays you list.
Countdown Timer
Count down a set duration or to a specific date and time, with an alarm, a desktop alert, a live tab-title countdown, and a fullscreen presentation view.
Cron Expression Parser
Translate a cron expression into plain English and preview its next scheduled run times.
Date Difference Calculator
Count the days, weeks, months, and years between any two dates, including or excluding the end date.
Date Format Converter
Paste a date in almost any form and see it instantly in every common format.
Day of the Week Calculator
Find out what day of the week any date falls on.
Days Since Date
Count the days elapsed since any past date, with a breakdown in weeks, months, years, and hours.
Days Until Date
Count the days until any future date, with a breakdown in weeks, months, and hours and an option to count only weekdays.
Duration Calculator
Add or subtract two durations and read the total in seconds, minutes, hours, days, and weeks.
Leap Year Calculator
Check whether a year is a leap year, see the rule that decided it, and list nearby leap years.
Meeting Planner
Compare working hours across up to five time zones and find the best time to meet.
Military Time Converter
Convert between 12-hour clock time and 24-hour military time, in either direction.
Moon Phase Calculator
See the current moon phase, illumination percentage, and moon age, plus the next new moon, full moon, and upcoming phase dates.
Pomodoro Timer
Run focus and break sessions with a big countdown, saved lengths, optional auto-start, and an alert when each block ends.
Online Stopwatch
A precise online stopwatch with start, stop, lap, and reset, showing elapsed time to hundredths of a second with split and cumulative lap times.
Time Adder
Add or subtract hours, minutes, and seconds from a clock time and see the result.
Time Card Calculator
Add up a week of shifts, breaks, overtime, and pay.
Time Zone Converter
See one moment in time across multiple time zones at once, with offsets and day shifts.
Unix Timestamp Converter
Convert Unix epoch timestamps in seconds or milliseconds to a readable date, and back again.
Week Number
The current ISO week number, plus the week number for any date you pick.
World Clock
See the live local time in cities around the world at once, updating every second, with 12 or 24-hour display and UTC offsets.
Frequently asked questions
- Do these time tools send my data anywhere?
- No. Timestamp conversion, time zone math, duration and date calculations, cron parsing, and age calculation all run locally in your browser. Nothing is sent to a server.
- Which time tools are available?
- A Unix timestamp converter, a time zone converter, a duration calculator, a date difference calculator, a cron expression parser, and an age calculator, with more added over time.
- Does the timestamp converter support seconds and milliseconds?
- Yes. It reads Unix timestamps in seconds or milliseconds and shows the matching human-readable date, with results in both your local time and UTC.
- What does the cron expression parser do?
- It explains a cron expression in plain English and shows the next run times, so you can confirm a schedule before adding it to a job.
- Are the time tools free to use?
- Yes. Every time and date tool is free, with no account, no sign-up, and no usage limits.