Categories
Time & Date
Age, hours, date differences, countdown timers and military time
27 calculators
Age Calculator
Calculate your exact age in years, months, days, hours and minutes.
Date Difference Calculator
Find the number of days, weeks or months between two dates.
Hours Calculator
Calculate hours between two times with breaks and overtime.
Countdown Timer
Set a live countdown to any future date or event.
Time Calculator
Add, subtract, multiply and divide time values.
Age Checker
Check age on any given date.
How Old Am I?
Your exact age down to the second.
Days & Business Days Calculator
Count days including business days.
Date ± Calendar Units
Add or subtract calendar units from dates.
Time & Date Difference
Difference between dates and times.
Hours and Minutes Calculator
Add hours and minutes.
Hours:Minutes:Seconds
Time arithmetic with seconds.
Time to Decimal
Convert time to decimal hours.
Decimal to Time
Convert decimal hours to HH:MM.
Time Clock Calculator
Clock-in/clock-out time tracking.
Work Hours Calculator
Calculate work hours with breaks.
Military Time Converter
Convert between 12-hour and 24-hour.
Military Time Charts
Reference military time charts.
Stopwatch Timer
Digital stopwatch.
Sunrise Sunset Times
Sunrise and sunset by location.
Age in Days Calculator
Approximate age in days.
Age in Hours Calculator
Approximate age in hours.
Age in Minutes Calculator
Approximate age in minutes.
Weeks Between Dates (from days)
Days ÷ 7.
Flight Time Calculator
Distance ÷ cruise speed.
Timezone Difference Calculator
From UTC offsets.
Jet Lag Recovery Estimate
~1 day per 1 hour difference.