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Convert milliseconds to seconds, seconds to milliseconds - Time Conversion

Use these online calculators to convert between milliseconds (ns) and seconds (sec). These Time conversion calculators provide a quick and easy way to convert:

  • milliseconds to seconds (ns to sec)
  • seconds to milliseconds (sec to ns)

Conversion Calculators

Enter your value in one of the conversion calculators below to convert milliseconds to seconds or convert seconds to milliseconds.

Convert milliseconds to seconds

milliseconds

Convert seconds to milliseconds

milliseconds

How to convert milliseconds to seconds: Use the conversion calculator on the left titled "Convert milliseconds to seconds". Enter a value in the milliseconds field and click on the "Calculate seconds" button. Your answer will appear in the sec field.

How to convert seconds to milliseconds: Use the conversion calculator on the right titled "Convert seconds to milliseconds". Enter a value in the sec field and click on the "Calculate milliseconds" button. Your answer will appear in the milliseconds field.

Conversion Definitions

Below are definitions relating to these conversion formulas.

What is a millisecond (ms)?

A millisecond is a unit of time. The symbol for millisecond is ms. There are 1,000 milliseconds in a second.

What is a second (sec or s)?

A second is a unit of time. The symbol for second is sec or s. There are 60 seconds in a minute.

Understanding the Time Units

This table provides a summary of the Time units within their respective measurement systems.

Unit Symbol Description
nanosecond ns  
microsecond μs 1 microsecond = 1,000 nanoseconds
millisecond ms 1 millisecond = 1,000 microseconds
second (base unit of Time) sec or s 1 second = 1,000 milliseconds
minute min 1 minute = 60 seconds
hour hr 1 hours = 60 minutes
day d 1 day = 24 hours
week wk 1 week = 7 days
fortnight 4tnite 1 4tnite = 2 weeks or 14 days