Time & date calculators
Military time, hours and time cards, durations, days between dates, date math and Unix timestamps. Every tool below is free, works instantly in your browser and explains the formula behind the result.
Time is the one unit everyone converts daily: 24-hour to 12-hour clocks, shift hours to decimal payroll hours, minutes to hours, and the number of days until a deadline. These calculators handle the awkward parts for you — base-60 arithmetic, shifts that cross midnight, months of different lengths, leap years and Unix time — and show the working so you can check the result.
19 tools in this category
- Hours to DaysConvert hours to days.
- Days to HoursConvert days to hours.
- Days to WeeksConvert days to weeks.
- Weeks to DaysConvert weeks to days.
- Weeks to MonthsConvert weeks to months (average).
- Months to WeeksConvert months (average) to weeks.
- Military Time ConverterConvert 24-hour military time to standard AM/PM time, or standard time to military time.
- Hours Calculator (Time Card)Add up a week of work hours.
- Time Duration CalculatorFind exactly how much time passes between a start and an end — in days, hours and minutes, and as total hours, minutes or seconds.
- Days Between Dates CalculatorCount how many days there are between two dates — useful for deadlines, countdowns, ages, notice periods and project planning.
- Date CalculatorFind the date a number of days, weeks, months or years before or after any date — for due dates, deadlines, warranties, subscriptions and planning.
- Unix Timestamp ConverterConvert a Unix timestamp to a readable date and time, or a date to a Unix timestamp.
- Minutes to Hours ConverterConvert any number of minutes into hours and minutes, decimal hours (for timesheets) and h:mm clock format.
- Seconds to Minutes ConverterConvert seconds into minutes and seconds, decimal minutes, hours and h:mm:ss clock format — handy for workouts, cooking timers, videos and lap times.
- Time to Decimal Hours ConverterConvert time worked in hours and minutes into decimal hours for timesheets, payroll and invoices.
- Minutes to Decimal ConverterConvert minutes into decimal hours — the format used on timesheets — and see the nearest quarter hour.
- Julian Date ConverterConvert a calendar date to a Julian date — the day-of-year code used on food packaging, in manufacturing and by the military — or decode one back to a date.
- Timecode & Frames ConverterFor video editors: convert timecode to frame counts and real-world time, or frame counts back to timecode.
- BPM to MS ConverterConvert a song’s tempo into delay times in milliseconds for quarter notes, eighth notes, dotted and triplet values.
Popular conversions
- 6 Hours to Days
- 12 Hours to Days
- 24 Hours to Days
- 36 Hours to Days
- 48 Hours to Days
- 72 Hours to Days
- 96 Hours to Days
- 120 Hours to Days
- 168 Hours to Days
- 720 Hours to Days
- 0.5 Days to Hours
- 1 Days to Hours
- 2 Days to Hours
- 3 Days to Hours
- 5 Days to Hours
- 7 Days to Hours
- 14 Days to Hours
- 30 Days to Hours
- 365 Days to Hours
- 7 Days to Weeks
- 10 Days to Weeks
- 14 Days to Weeks
- 21 Days to Weeks
- 28 Days to Weeks
Other categories
- Temperature converters
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- Everyday calculators