Convert hours to years

One hour equals 0.0001141 years. To convert any number of hours to years, multiply by 0.00011408.

The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.

Time conversions are exact down to the day and approximate above it. Seconds, minutes, hours and days have fixed ratios, but a month has no fixed length and a year has two — 365 days in the calendar and 365.25 in the astronomical convention used here. For anything with legal or contractual weight, count the actual calendar dates rather than converting a duration, because the difference accumulates precisely where it is least welcome.

hours to years formula

To go the other way, use hour = year ÷ 0.00011408.

About these units

The hour is 3,600 seconds. Its length is arbitrary in physical terms: it descends from dividing daylight into twelve parts, which meant the hour changed with the seasons until mechanical clocks fixed it.

This uses the Julian year of 365.25 days, the astronomical convention. A calendar year is 365 or 366 days depending on leap years.

Hour is also written hours, hr and hrs. Year is also written years and yrs.

Sources

1. International Astronomical Union, Resolution B2 (2012), XXVIII General Assembly — the astronomical unit as exactly 149,597,870,700 m, and the Julian year of 365.25 days from which the light year and parsec follow.