Fast duration conversion

Time Converter

Convert durations from nanoseconds to millennia instantly in your browser.

From value From unit

To value To unit

Calendar-based units use standard average values: one month is 30.436875 days and one year is 365.2425 days.

Other popular conversions

Fast duration conversion

All calculations are performed locally in your browser. No values are stored or uploaded.

Features

Convert durations from nanoseconds to millennia instantly in your browser.

Convert from nanoseconds through average calendar months, years, decades, centuries, and millennia.

Results update while you type or select a different time unit.

Reverse the conversion direction without entering your values again.

Convert values such as 1.5 hours or 0.25 days accurately.

Calendar months and years use standard average durations for consistent conversions.

Your values stay in your browser and are never sent to our servers.

One standard day contains exactly 86,400 seconds: 24 hours × 60 minutes × 60 seconds.

Calendar months have 28 to 31 days. The converter uses the standard average month of 30.436875 days for consistent results.

Yes. Enter decimal values such as 1.5 hours to get 90 minutes or 5,400 seconds.

Yes. It supports nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, average months, and larger units.

This is the standard Gregorian calendar average, which accounts for regular leap-year rules over a 400-year cycle.

No. Every calculation happens locally in your browser without uploading your values.