Decades to Years Converter
Convert decades (dec) to years (average Gregorian) (yr), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a length of time, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 dec = 10 yr
- 1 × 10 = 10 yr
How to convert decades to years
1 dec = 10 yr, so multiply by 10 to go from decades to years (average Gregorian). Going the other way, 1 yr = 0.1 dec.
yr = dec × 10 dec = yr × 0.1
Worked example:
1 dec = 10 yr 5 × 10 = 50 yr
Decades to years table
| Decades | Years |
|---|---|
| 1 dec | 10 yr |
| 2 dec | 20 yr |
| 3 dec | 30 yr |
| 4 dec | 40 yr |
| 5 dec | 50 yr |
| 6 dec | 60 yr |
| 7 dec | 70 yr |
| 8 dec | 80 yr |
| 9 dec | 90 yr |
| 10 dec | 100 yr |
| 15 dec | 150 yr |
| 20 dec | 200 yr |
| 25 dec | 250 yr |
| 30 dec | 300 yr |
| 40 dec | 400 yr |
| 50 dec | 500 yr |
| 75 dec | 750 yr |
| 100 dec | 1,000 yr |
| 250 dec | 2,500 yr |
| 500 dec | 5,000 yr |
| 1000 dec | 10,000 yr |
About the units
- Decades (dec)
- Decades, a specialised unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
- Years (yr)
- Years (average Gregorian), a specialised unit. 365.2425 days, the average Gregorian calendar year. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).