---
title: "Decades to Years — decade to yr converter"
description: "1 decade = 10 years. Convert decades to years with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/decades-to-years/
site: "At One Place"
---

# Decades to years

**1 decade in years: 1 decade = 10 yr**

yr = decade × 10

To convert decades to years, multiply by 10. The table below gives the values people look up most often, and the converter works for any number.

## Decades to years table

*Common decade values converted to years.*

| Decades | Years |
| --- | --- |
| 1 decade | 10 |
| 2 decade | 20 |
| 3 decade | 30 |
| 4 decade | 40 |
| 5 decade | 50 |
| 10 decade | 100 |
| 15 decade | 150 |
| 20 decade | 200 |
| 25 decade | 250 |
| 30 decade | 300 |
| 40 decade | 400 |
| 50 decade | 500 |
| 75 decade | 750 |
| 100 decade | 1,000 |
| 250 decade | 2,500 |
| 500 decade | 5,000 |
| 1,000 decade | 10,000 |

## How the conversion works

The relationship is yr = decade × 10. Both units measure time, so the conversion is a fixed factor that never changes.

> Year: Mean Gregorian year, 365.2425 days.

## Common questions

### How many years are in one decade?

One decade equals 10 years. yr = decade × 10.

### How do you convert decades to years?

Use yr = decade × 10. So 10 decade is 100 yr.

### How many decades are in one year?

One year equals 0.1 decades, which is the reverse of the conversion above.

### Is there more than one kind of year?

Mean Gregorian year, 365.2425 days.

## Related pages

- [Years to Decades](https://atoneplace.net/convert/years-to-decades/)
- [Decades to Seconds](https://atoneplace.net/convert/decades-to-seconds/)
- [Decades to Milliseconds](https://atoneplace.net/convert/decades-to-milliseconds/)
- [Decades to Minutes](https://atoneplace.net/convert/decades-to-minutes/)
- [Decades to Hours](https://atoneplace.net/convert/decades-to-hours/)
- [Decades to Days](https://atoneplace.net/convert/decades-to-days/)
- [Decades to Weeks](https://atoneplace.net/convert/decades-to-weeks/)
- [Decades to Months](https://atoneplace.net/convert/decades-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)
- Calculated on this page — At One Place (/about/)