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Timestamp Unit Converter

Convert seconds, milliseconds, microseconds and nanoseconds without integer precision loss.

Convert in your browser · No sign-up

Accepts up to 30 integer digits and 9 decimal places. Uses decimal string arithmetic, without guessing the input unit or discarding fractional units.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

Result

Add your input or load an example, then run the tool. Your result will appear here.

How to use

  1. Convert seconds, milliseconds, microseconds and nanoseconds without integer precision loss.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

1767225600123456789 ns → 1767225600.123456789 s

Details and limitations

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: