Time Unit Converter

Value

From

Result

Result60
From unithour
To unitminute
Conversion factor60
Inverse factor0.016667
In other unitssecond: 3600 millisecond: 3600000 day: 0.041667 week: 0.005952 month: 0.001369 year: 0.000114

Months and years are conventions

Converts time between milliseconds, seconds, minutes, hours, days, weeks, months and years.

Up to a week everything is exact: sixty seconds in a minute, 3,600 in an hour, 86,400 in a day. Beyond that it becomes conventional, because months differ in length and years are sometimes leap years.

Here a month is taken as 30.44 days and a year as 365.25. Those are the calendar averages, and any conversion where specific dates are unknown has to rest on them.

What this calculator shows

An exact conversion between the pair of units you pick
The conversion factor in both directions
The same quantity in several other units

What to keep in mind

A month is 30.44 days and a year is 365.25 days: both are calendar averages.
Working between specific dates needs a calendar calculator that knows the length of each month.

FAQs

How many seconds in a day?

86,400. A week is 604,800, an average month about 2.63 million, a year roughly 31.56 million.

Why is a year 365.25 days?

Because a leap year adds a day every four. The exact Gregorian mean is 365.2425, but 365.25 is close enough for everyday conversion.

How many days in a month for calculations?

30.44 — that is 365.25 divided by twelve. Financial work sometimes uses exactly 30 days, and the results differ slightly.

How many milliseconds in a second?

A thousand. A minute holds 60,000 and a day 86.4 million.

Worked example

An hour in minutes

Input: 1 hour into minutes

Output: 60 minutes

Note: The trivial case, but the neighbouring rows earn their keep: the same hour is 3,600 seconds, 0.0417 days and 0.000114 years. That last figure explains a good deal about how short an hour of holiday feels.

Useful links

All tools in Converters for units, temperature, weight, and cooking measures

Time Unit Converter

Result

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