This free online time conversion tool makes it easy to convert a time value into a wide range of commonly used units, from extremely small scientific measurements to long-term calendar-based periods. Whether you’re working with precise timing data, programming delays, project planning, or historical time spans, this calculator provides fast and accurate conversions.

With this time calculator, you can convert between Nanoseconds, Microseconds, Milliseconds, Seconds, Minutes, Hours, Days, Weeks, Months, Years, Decades, and Centuries. Simply enter a value into any of the available input fields, and the calculator will instantly convert and display the equivalent values across all other supported time units, eliminating the need for manual calculations.

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How to Use?

The time conversion calculator is a handy webtool to use to convert from one time to another.

1. Enter a time value into one of the fields above.
2. All the other fields will automatically update to their converted time.
3. You can copy any time value to the clipboard, by clicking on the symbol.
4. Any number value will be accepted including the 'e' exponent.
5. If you would like to see another time added to the above, please contact us.

Time Unit Comparison Table

Important Notes

• Smaller units (ns → ms) are commonly used in computing and science.
• Larger units (days → centuries) are often calendar-based and approximate.
• Months and years vary in length, so average values are used for conversion.
• This tool is ideal for both precise timing and long-term planning.