---
title: "Years to Months — yr to mo converter"
description: "1 year = 12 months. Convert years to months with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/years-to-months/
site: "At One Place"
---

# Years to months

**1 year in months: 1 yr = 12 mo**

mo = yr × 12

To convert years to months, multiply by 12. The table below gives the values people look up most often, and the converter works for any number.

## Years to months table

*Common year values converted to months.*

| Years | Months |
| --- | --- |
| 1 yr | 12 |
| 2 yr | 24 |
| 3 yr | 36 |
| 4 yr | 48 |
| 5 yr | 60 |
| 10 yr | 120 |
| 15 yr | 180 |
| 20 yr | 240 |
| 25 yr | 300 |
| 30 yr | 360 |
| 40 yr | 480 |
| 50 yr | 600 |
| 75 yr | 900 |
| 100 yr | 1,200 |
| 250 yr | 3,000 |
| 500 yr | 6,000 |
| 1,000 yr | 12,000 |

## How the conversion works

The relationship is mo = yr × 12. Both units measure time, so the conversion is a fixed factor that never changes.

> Year: Mean Gregorian year, 365.2425 days.

> Month: Average calendar month (1/12 of a Gregorian year).

## Common questions

### How many months are in one year?

One year equals 12 months. mo = yr × 12.

### How do you convert years to months?

Use mo = yr × 12. So 10 yr is 120 mo.

### How many years are in one month?

One month equals 0.083333 years, which is the reverse of the conversion above.

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

Mean Gregorian year, 365.2425 days. Average calendar month (1/12 of a Gregorian year).

## Related pages

- [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/)

## 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/)