Time Unit Conversion Calculators

Convert one unit of time to another. Start by selecting the time unit to convert from.

Measuring Time

Clocks are used to measure time in hours, minutes, and seconds.

Time is the measurement of the sequence and duration of events occurring in the past, present, and future. Dictionary.com defines time as the system of those sequential relations that any event has to any other, as past, present, or future; indefinite and continuous duration regarded as that in which events succeed one another.

Calendars, clocks and watches are all instruments for measuring time. Calendars can be used to measure years, months, and days, while clocks can be used to measure hours, minutes, and seconds. A year is equal to 12 months, a month is equal to 28-31 days, a day is equal to 24 hours, an hour is equal to 60 minutes, and a minute is equal to 60 seconds.

The table below compares common measures of time. Use the unit conversion tools above to convert from one unit of time to another unit of time.

Units of Time Measurement

Units of time include centuries, decades, years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds.

Common Time Measurement Conversions

Hours to minutes time conversion: 1 hour is equal to 60 minutes
Hours to seconds time conversion: 1 hour is equal to 3,600 seconds
Hours to milliseconds time conversion: 1 hour is equal to 3,600,000 milliseconds
Days to hours time conversion: 1 day is equal to 24 hours
Days to minutes time conversion: 1 day is equal to 1,440 minutes
Days to seconds time conversion: 1 day is equal to 86,400 seconds

Time Unit Conversion Table

Equivalent time duration values
Convert From	Century	Decade	Year	Month	Week	Day	Hour	Minute	Second	Millisecond	Microsecond	Nanosecond
1 century =	1	10	100 yr	1,200 mo	5,218 wk	36,524 day	876,582 hr	52,594,920 min	3,155,695,200 sec	3,155,695,200,000 ms	3,155,700,000,000,000 µs	3,155,700,000,000,000,000 ns
1 decade =	0.1	1	10 yr	120 mo	521.775 wk	3,652 day	87,658 hr	5,259,492 min	315,569,520 sec	315,569,520,000 ms	315,570,000,000,000 µs	315,570,000,000,000,000 ns
1 year =	0.01	0.1	1 yr	12 mo	52.1775 wk	365.2425 day	8,766 hr	525,949 min	31,556,952 sec	31,556,952,000 ms	31,556,952,000,000 µs	31,557,000,000,000,000 ns
1 month =	0.000833	0.008333	0.083333 yr	1 mo	4.348125 wk	30.436875 day	730.485 hr	43,829 min	2,629,746 sec	2,629,746,000 ms	2,629,746,000,000 µs	2,629,700,000,000,000 ns
1 week =	0.000192	0.001917	0.019165 yr	0.229984 mo	1 wk	7 day	168 hr	10,080 min	604,800 sec	604,800,000 ms	604,800,000,000 µs	604,800,000,000,000 ns
1 day =	0.000027379	0.000274	0.002738 yr	0.032855 mo	0.142857 wk	1 day	24 hr	1,440 min	86,400 sec	86,400,000 ms	86,400,000,000 µs	86,400,000,000,000 ns
1 hour =	0.0000011408	0.000011408	0.000114 yr	0.001369 mo	0.005952 wk	0.041667 day	1 hr	60 min	3,600 sec	3,600,000 ms	3,600,000,000 µs	3,600,000,000,000 ns
1 minute =	0.000000019013	0.00000019013	0.0000019013 yr	0.000022816 mo	0.000099206 wk	0.000694 day	0.016667 hr	1 min	60 sec	60,000 ms	60,000,000 µs	60,000,000,000 ns
1 second =	0.00000000031689	0.0000000031689	0.000000031689 yr	0.00000038026 mo	0.0000016534 wk	0.000011574 day	0.000278 hr	0.016667 min	1 sec	1,000 ms	1,000,000 µs	1,000,000,000 ns
1 millisecond =	0.00000000000031689	0.0000000000031689	0.000000000031689 yr	0.00000000038026 mo	0.0000000016534 wk	0.000000011574 day	0.00000027778 hr	0.000016667 min	0.001 sec	1 ms	1,000 µs	1,000,000 ns
1 microsecond =	0.00000000000000031689	0.0000000000000031689	0.000000000000031689 yr	0.00000000000038026 mo	0.0000000000016534 wk	0.000000000011574 day	0.00000000027778 hr	0.000000016667 min	0.000001 sec	0.001 ms	1 µs	1,000 ns
1 nanosecond =	0.00000000000000000031689	0.0000000000000000031689	0.000000000000000031689 yr	0.00000000000000038026 mo	0.0000000000000016534 wk	0.000000000000011574 day	0.00000000000027778 hr	0.000000000016667 min	0.000000001 sec	0.000001 ms	0.001 µs	1 ns