All time units explained
| Unit | Symbol | Value in Second | Description |
|---|---|---|---|
| Second | s | 1 s | The second is the SI base unit of time, defined by the vibrations of the caesium-133 atom. |
| Millisecond | ms | 0.001 s | A millisecond is one thousandth of a second, used in computing and sports timing. |
| Minute | min | 60 s | A minute equals 60 seconds. |
| Hour | h | 3,600 s | An hour equals 60 minutes or 3,600 seconds. |
| Day | d | 86,400 s | A day equals 24 hours or 86,400 seconds. |
| Week | wk | 604,800 s | A week equals 7 days. |
| Month (average) | mo | 2,629,746 s | An average Gregorian month is 30.436875 days. |
| Year | yr | 31,556,952 s | An average Gregorian year is 365.2425 days. |
Popular time conversions
Each conversion below has its own page with a formula, worked example and table.
Minutes to HoursHours to MinutesYears to DaysSeconds to MinutesSeconds to HoursSeconds to DaysSeconds to WeeksSeconds to YearsMinutes to SecondsMinutes to DaysMinutes to WeeksMinutes to YearsHours to SecondsHours to DaysHours to WeeksHours to YearsDays to SecondsDays to MinutesDays to HoursDays to WeeksDays to YearsWeeks to SecondsWeeks to MinutesWeeks to HoursWeeks to DaysWeeks to YearsYears to SecondsYears to MinutesYears to HoursYears to Weeks
When do you need a time converter?
Time conversions are used for project planning, salary and work-hour calculations, cooking timers and scientific data. Different countries and industries use different units, so a reliable converter prevents costly mistakes.
Frequently asked questions
Which time units are supported?
Second (s), Millisecond (ms), Minute (min), Hour (h), Day (d), Week (wk), Month (average) (mo), Year (yr).
Is the converter free?
Yes, completely free with no limits, and it works offline once loaded.
How accurate are the results?
Conversions use exact standard factors with full double-precision arithmetic.