Duration Unit Converter
Enter any duration in any unit — nanoseconds to weeks — and instantly see the equivalent in every other unit, plus the human-readable breakdown.
Why the same duration has so many different numbers
Two hours is two hours — but written out it becomes 120 minutes, 7,200 seconds, 7,200,000 milliseconds, or 7,200,000,000,000 nanoseconds depending on the unit being used. Different tools, apps, and file formats each pick the unit that makes sense for their context, so the same underlying amount of time can look completely different depending on where you encounter it.
This converter lets you start from whatever unit you have and see all the equivalents at once. Enter a value, pick its unit from the dropdown, and every other representation updates instantly — useful whether you are comparing a setting in one app to a value in another, or just trying to make sense of an unfamiliar number. Need to add or subtract two durations instead of just converting one? Use the Duration Calculator.
Frequently asked questions
How do I convert minutes to seconds?
Multiply by 60. Enter your minutes in the tool, select 'Minutes' as the unit, and read off the seconds row.
How do I convert hours to milliseconds?
Multiply by 3,600,000. One hour = 60 minutes = 3,600 seconds = 3,600,000 milliseconds.
What is the difference between a millisecond, microsecond, and nanosecond?
Each is 1,000× smaller than the previous. 1 second = 1,000 milliseconds = 1,000,000 microseconds = 1,000,000,000 nanoseconds. Milliseconds appear in JS and network timing; microseconds in database queries; nanoseconds in CPU-level profiling and Go's time.Duration.
How many milliseconds are in a day?
86,400,000 milliseconds. This constant (24 × 60 × 60 × 1,000) appears frequently in JavaScript when setting cookie or session expiry durations.
Why does Go use nanoseconds for time.Duration?
Go's time.Duration is an int64 counting nanoseconds, which gives sub-millisecond precision while remaining a plain integer — no floating-point rounding. The maximum representable duration is about 290 years.