Time Converter

How to convert time units

Time is based on the second: one minute is 60 s, one hour is 3,600 s, and one day is 86,400 s. Note that this tool defines a month as 30 days and a year as 365 days - real calendar months and leap years vary, so longer spans are approximate.

Worked example

Two hours is 2 × 3600 = 7,200 s. Ninety minutes is 90 ÷ 60 = 1.5 h, and one day is 86,400 s = 1,440 min.

How many seconds are in an hour?

One hour equals 3,600 seconds. One day equals 86,400 seconds, one week equals 7 days, one (30-day) month equals 2,592,000 seconds, and one (365-day) year equals 31,536,000 seconds.

When you'll use a time converter

Time conversion is handy for durations in code and logs (nanoseconds, milliseconds, seconds), timers and scheduling, and scientific timing. The table above lists your value in all 9 supported units at once, using the 30-day month and 365-day year convention.

Frequently asked questions

How many milliseconds are in a second?

One second equals 1,000 milliseconds. The millisecond is one thousandth of a second and is common in code, logs, and timers.

How many nanoseconds are in a second?

One second equals 1,000,000,000 nanoseconds, since a nanosecond is one billionth of a second. This unit is used for very fine timing in computing and physics.

How many hours are in a year?

Using the 365-day year convention, one year equals 8,760 hours, found by multiplying 365 days by 24 hours per day.

How many weeks are in a year?

A 365-day year contains about 52.14 weeks, since 365 divided by 7 is roughly 52.14. People often round this to 52 weeks for everyday planning.

What is the formula to convert nanoseconds to seconds?

Divide the number of nanoseconds by 1,000,000,000 to get seconds. For example, 500,000,000 ns divided by one billion equals 0.5 seconds.

Is a week longer than a 30-day month?

No, a 30-day month is longer than a week. One week is 7 days while this tool defines a month as 30 days, so a month is a bit more than four weeks.