Year to Month Converter

Type a value — the answer appears instantly. 1 yr = 12 mo.

Reviewed by the OmniCalc teamMethod verified 2026-07-01

From (years)

To (months)

Result

12 months

= 31,557,600 s= 8,766 h

Formula: mo = yr × 12

Year to Month formula

mo = yr × 12

Convert 5 years to months

Start with 5 years.
Multiply by the conversion factor: 5 × 12 = 60.
So 5 yr = 60 mo.

Year to Month conversion table

Year to Month conversion table
Years (yr)	Months (mo)
0.01 yr	0.12 mo
0.1 yr	1.2 mo
0.25 yr	3 mo
0.5 yr	6 mo
1 yr	12 mo
2 yr	24 mo
3 yr	36 mo
4 yr	48 mo
5 yr	60 mo
6 yr	72 mo
7 yr	84 mo
8 yr	96 mo
9 yr	108 mo
10 yr	120 mo
15 yr	180 mo
20 yr	240 mo
25 yr	300 mo
30 yr	360 mo
40 yr	480 mo
50 yr	600 mo
75 yr	900 mo
100 yr	1,200 mo
250 yr	3,000 mo
500 yr	6,000 mo
1,000 yr	12,000 mo
5,000 yr	60,000 mo
10,000 yr	120,000 mo

Unit definitions

What is a year?

For duration conversion the year is treated as the Julian year of 365.25 days, which averages in the leap day. It is close to the actual mean calendar year and suitable for interest, age, and long-span estimates. For exact dates, use a calendar-aware date calculator.

What is a month?

For duration conversion the month is treated as an average of 30.4375 days (365.25 ÷ 12), since calendar months vary from 28 to 31 days. This average is suitable for rough estimates such as loan terms or subscription lengths, not exact calendar arithmetic. Use a date calculator for precise month differences.

Frequently asked questions

How many months are in one year?

One year equals 12 months (1 yr = 12 mo).

How do I convert years to months?

Multiply the value in years by 12. For example, 10 yr × 12 = 120 mo.

Which is bigger — a year or a month?

A year is bigger: one year contains 12 months.

Is this year to month converter free?

Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.

Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.