UtilityBaseTime & Date Tools
Everything for working with time and dates: convert between 24-hour and 12-hour time, check time zones and a world clock, calculate the duration between dates or days until an event, track hours worked, and run countdown timers. Each tool is free, instant, and runs in your browser.
Military Time Converter
Convert between 24-hour and 12-hour time, live — with the full chart.
Calculators
Time Zone Converter
Convert any date and time across world cities — DST handled automatically.
Productivity Tools
World Clock
Live times across cities, with day/night and the offset from you.
Productivity Tools
Time Card Calculator
Weekly timesheet: clock in/out per day, breaks, overtime, and gross pay.
Calculators
Date Duration Calculator
Count days until a date, or the exact time between any two dates.
Calculators
Days Until Calculator
Live countdown to any date — days, hours, minutes, seconds, and weekends left.
Calculators
Business Days Calculator
Count the working days between two dates, excluding weekends and holidays.
Calculators
Age Calculator
Calculate exact age in years, months, and days — plus your next birthday.
Calculators
Countdown Timer
Set hours, minutes, and seconds — get an audible alarm when time's up.
Productivity Tools
Pomodoro Timer
Focus in 25-minute sessions with automatic breaks — the classic Pomodoro cycle.
Productivity Tools
Timestamp Converter
Convert Unix timestamps to human dates and back — seconds or milliseconds.
Developer Tools
Discord Timestamp Generator
Create Discord <t:…> timestamp codes that show in everyone's own time zone.
Developer Tools
Sunrise & Sunset Calculator
Sunrise, sunset, dawn, dusk, and day length for any place and date.
Calculators
1 Minute Timer
A free 1-minute countdown timer with an alarm — preset to 1:00, one click to start.
Productivity Tools
2 Minute Timer
A free 2-minute countdown timer with an alarm — preset to 2:00, one click to start.
Productivity Tools
3 Minute Timer
A free 3-minute countdown timer with an alarm — preset to 3:00, one click to start.
Productivity Tools
5 Minute Timer
A free 5-minute countdown timer with an alarm — preset to 5:00, one click to start.
Productivity Tools
10 Minute Timer
A free 10-minute countdown timer with an alarm — preset to 10:00, one click to start.
Productivity Tools
15 Minute Timer
A free 15-minute countdown timer with an alarm — preset to 15:00, one click to start.
Productivity Tools
20 Minute Timer
A free 20-minute countdown timer with an alarm — preset to 20:00, one click to start.
Productivity Tools
30 Minute Timer
A free 30-minute countdown timer with an alarm — preset to 30:00, one click to start.
Productivity Tools
45 Minute Timer
A free 45-minute countdown timer with an alarm — preset to 45:00, one click to start.
Productivity Tools
60 Minute Timer
A free 60-minute (1 hour) countdown timer with an alarm — preset to 1:00:00, one click to start.
Productivity Tools
Frequently asked questions
What is military (24-hour) time?
Military time counts the hours from 00 at midnight to 23, avoiding the AM/PM ambiguity of the 12-hour clock. 1:00 PM is 1300, midnight is 0000, and noon is 1200. The military time converter translates both directions with a full chart.
Do these handle time zones and daylight saving?
The world clock and time zone converter use your device's time zone data, which accounts for daylight saving where it applies. Always double-check around DST transition dates, which can shift by an hour.
Are these free?
Yes — every time and date tool here is free, needs no account, and runs entirely in your browser.