Time Unit Converter
Convert values between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, and days with precise factors.
Convert nanoseconds through days with one input
Durations appear in logs, media pipelines, and SLO dashboards in many units, nanoseconds for latency traces, milliseconds for UI timers, hours for billing. Enter one amount, pick the source unit, and see every supported scale instantly. All math runs in your browser; nothing is uploaded.
Supported units
Nanoseconds, microseconds, milliseconds, seconds, minutes, hours, and days share exact conversion factors (for example, 1 day = 86,400 seconds). Very large or tiny values use scientific notation so precision stays readable.
For ISO-8601 duration strings or week-level conversions, use the Duration Converter. To add clock times instead of scalar units, try Time Duration Arithmetic.
Frequently Asked Questions
How many nanoseconds are in one second?
Exactly one billion (1,000,000,000). The tool uses that factor when converting between sub-second and second-scale units.
Can I convert fractional values?
Yes. Decimal inputs such as 1.5 hours are supported and propagate to
all output units.
Is data sent to a server?
No. Conversion happens locally in JavaScript, so internal timing numbers can stay on your machine.
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