---
title: "Time converter — every unit"
description: "Convert between every time unit: second, millisecond, minute, hour, day and more. Tables, exact formulas and a calculator."
url: https://atoneplace.net/convert/time/
site: "At One Place"
---

# Time conversions

Every time unit on the site, and every conversion between them. Each page shows a full table, the exact formula and a live calculator.

## All time units

*Every time unit and its size relative to the base unit.*

| Unit | Symbol | In second |
| --- | --- | --- |
| second | s | 1 |
| millisecond | ms | 0.001 |
| microsecond | µs | 0.000001 |
| minute | min | 60 |
| hour | h | 3,600 |
| day | d | 86,400 |
| week | wk | 604,800 |
| month | mo | 2,629,746 |
| year | yr | 31,556,952 |
| decade | decade | 315,569,520 |
| century | century | 3,155,695,200 |

## Common conversions

- [Seconds to Milliseconds](https://atoneplace.net/convert/seconds-to-milliseconds/)
- [Seconds to Minutes](https://atoneplace.net/convert/seconds-to-minutes/)
- [Seconds to Hours](https://atoneplace.net/convert/seconds-to-hours/)
- [Seconds to Days](https://atoneplace.net/convert/seconds-to-days/)
- [Seconds to Weeks](https://atoneplace.net/convert/seconds-to-weeks/)
- [Seconds to Months](https://atoneplace.net/convert/seconds-to-months/)
- [Seconds to Years](https://atoneplace.net/convert/seconds-to-years/)
- [Milliseconds to Seconds](https://atoneplace.net/convert/milliseconds-to-seconds/)
- [Milliseconds to Minutes](https://atoneplace.net/convert/milliseconds-to-minutes/)
- [Milliseconds to Hours](https://atoneplace.net/convert/milliseconds-to-hours/)
- [Milliseconds to Days](https://atoneplace.net/convert/milliseconds-to-days/)
- [Milliseconds to Weeks](https://atoneplace.net/convert/milliseconds-to-weeks/)
- [Milliseconds to Months](https://atoneplace.net/convert/milliseconds-to-months/)
- [Milliseconds to Years](https://atoneplace.net/convert/milliseconds-to-years/)
- [Minutes to Seconds](https://atoneplace.net/convert/minutes-to-seconds/)
- [Minutes to Milliseconds](https://atoneplace.net/convert/minutes-to-milliseconds/)
- [Minutes to Hours](https://atoneplace.net/convert/minutes-to-hours/)
- [Minutes to Days](https://atoneplace.net/convert/minutes-to-days/)
- [Minutes to Weeks](https://atoneplace.net/convert/minutes-to-weeks/)
- [Minutes to Months](https://atoneplace.net/convert/minutes-to-months/)
- [Minutes to Years](https://atoneplace.net/convert/minutes-to-years/)
- [Hours to Seconds](https://atoneplace.net/convert/hours-to-seconds/)
- [Hours to Milliseconds](https://atoneplace.net/convert/hours-to-milliseconds/)
- [Hours to Minutes](https://atoneplace.net/convert/hours-to-minutes/)
- [Hours to Days](https://atoneplace.net/convert/hours-to-days/)
- [Hours to Weeks](https://atoneplace.net/convert/hours-to-weeks/)
- [Hours to Months](https://atoneplace.net/convert/hours-to-months/)
- [Hours to Years](https://atoneplace.net/convert/hours-to-years/)
- [Days to Seconds](https://atoneplace.net/convert/days-to-seconds/)
- [Days to Milliseconds](https://atoneplace.net/convert/days-to-milliseconds/)
- [Days to Minutes](https://atoneplace.net/convert/days-to-minutes/)
- [Days to Hours](https://atoneplace.net/convert/days-to-hours/)
- [Days to Weeks](https://atoneplace.net/convert/days-to-weeks/)
- [Days to Months](https://atoneplace.net/convert/days-to-months/)
- [Days to Years](https://atoneplace.net/convert/days-to-years/)
- [Weeks to Seconds](https://atoneplace.net/convert/weeks-to-seconds/)
- [Weeks to Milliseconds](https://atoneplace.net/convert/weeks-to-milliseconds/)
- [Weeks to Minutes](https://atoneplace.net/convert/weeks-to-minutes/)
- [Weeks to Hours](https://atoneplace.net/convert/weeks-to-hours/)
- [Weeks to Days](https://atoneplace.net/convert/weeks-to-days/)
- [Weeks to Months](https://atoneplace.net/convert/weeks-to-months/)
- [Weeks to Years](https://atoneplace.net/convert/weeks-to-years/)
- [Months to Seconds](https://atoneplace.net/convert/months-to-seconds/)
- [Months to Milliseconds](https://atoneplace.net/convert/months-to-milliseconds/)
- [Months to Minutes](https://atoneplace.net/convert/months-to-minutes/)
- [Months to Hours](https://atoneplace.net/convert/months-to-hours/)
- [Months to Days](https://atoneplace.net/convert/months-to-days/)
- [Months to Weeks](https://atoneplace.net/convert/months-to-weeks/)
- [Months to Years](https://atoneplace.net/convert/months-to-years/)
- [Years to Seconds](https://atoneplace.net/convert/years-to-seconds/)
- [Years to Milliseconds](https://atoneplace.net/convert/years-to-milliseconds/)
- [Years to Minutes](https://atoneplace.net/convert/years-to-minutes/)
- [Years to Hours](https://atoneplace.net/convert/years-to-hours/)
- [Years to Days](https://atoneplace.net/convert/years-to-days/)
- [Years to Weeks](https://atoneplace.net/convert/years-to-weeks/)
- [Years to Months](https://atoneplace.net/convert/years-to-months/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)