Months to Years Converter

To convert months to years, divide the number of months by 12. For example, 30 months ÷ 12 = 2.5 years, which is 2 years and 6 months. Use the converter below or find any number from 1 to 120 in the chart.

Months to years converter

How to convert months to years

There are 12 months in a year, so:

  • Years (decimal) = months ÷ 12. 30 months ÷ 12 = 2.5 years.
  • Years and months: divide by 12; the whole number is the years and the remainder is the months. 30 ÷ 12 = 2 remainder 6, so 30 months is 2 years and 6 months.
  • Years to months = years × 12. 2.5 years × 12 = 30 months.

Common conversions

MonthsYears and monthsYears (decimal)
66 months0.5 (half a year)
181 year 6 months1.5 (a year and a half)
242 years2
302 years 6 months2.5
363 years3
423 years 6 months3.5
484 years4
605 years5
847 years7
12010 years10

Decimal years explained

Decimal years are useful in calculations, but they are easy to misread. 2.5 years is 2 years and 6 months, not 2 years and 5 months. These fractions come up most often:

DecimalMonths
0.25 years3 months
0.5 years6 months
0.75 years9 months
0.33 yearsabout 4 months
0.67 yearsabout 8 months
0.08 yearsabout 1 month

Months to years chart (1 to 120 months)

MonthsYears and monthsYears (decimal)
11 month0.08
22 months0.17
33 months0.25
44 months0.33
55 months0.42
66 months0.5
77 months0.58
88 months0.67
99 months0.75
1010 months0.83
1111 months0.92
121 year1
131 year 1 month1.08
141 year 2 months1.17
151 year 3 months1.25
161 year 4 months1.33
171 year 5 months1.42
181 year 6 months1.5
191 year 7 months1.58
201 year 8 months1.67
211 year 9 months1.75
221 year 10 months1.83
231 year 11 months1.92
242 years2
252 years 1 month2.08
262 years 2 months2.17
272 years 3 months2.25
282 years 4 months2.33
292 years 5 months2.42
302 years 6 months2.5
312 years 7 months2.58
322 years 8 months2.67
332 years 9 months2.75
342 years 10 months2.83
352 years 11 months2.92
363 years3
373 years 1 month3.08
383 years 2 months3.17
393 years 3 months3.25
403 years 4 months3.33
413 years 5 months3.42
423 years 6 months3.5
433 years 7 months3.58
443 years 8 months3.67
453 years 9 months3.75
463 years 10 months3.83
473 years 11 months3.92
484 years4
494 years 1 month4.08
504 years 2 months4.17
514 years 3 months4.25
524 years 4 months4.33
534 years 5 months4.42
544 years 6 months4.5
554 years 7 months4.58
564 years 8 months4.67
574 years 9 months4.75
584 years 10 months4.83
594 years 11 months4.92
605 years5
615 years 1 month5.08
625 years 2 months5.17
635 years 3 months5.25
645 years 4 months5.33
655 years 5 months5.42
665 years 6 months5.5
675 years 7 months5.58
685 years 8 months5.67
695 years 9 months5.75
705 years 10 months5.83
715 years 11 months5.92
726 years6
736 years 1 month6.08
746 years 2 months6.17
756 years 3 months6.25
766 years 4 months6.33
776 years 5 months6.42
786 years 6 months6.5
796 years 7 months6.58
806 years 8 months6.67
816 years 9 months6.75
826 years 10 months6.83
836 years 11 months6.92
847 years7
857 years 1 month7.08
867 years 2 months7.17
877 years 3 months7.25
887 years 4 months7.33
897 years 5 months7.42
907 years 6 months7.5
917 years 7 months7.58
927 years 8 months7.67
937 years 9 months7.75
947 years 10 months7.83
957 years 11 months7.92
968 years8
978 years 1 month8.08
988 years 2 months8.17
998 years 3 months8.25
1008 years 4 months8.33
1018 years 5 months8.42
1028 years 6 months8.5
1038 years 7 months8.58
1048 years 8 months8.67
1058 years 9 months8.75
1068 years 10 months8.83
1078 years 11 months8.92
1089 years9
1099 years 1 month9.08
1109 years 2 months9.17
1119 years 3 months9.25
1129 years 4 months9.33
1139 years 5 months9.42
1149 years 6 months9.5
1159 years 7 months9.58
1169 years 8 months9.67
1179 years 9 months9.75
1189 years 10 months9.83
1199 years 11 months9.92
12010 years10

When people count in months

  • Babies and toddlers. Ages are often given in months until about age 2 or 3, so “30 months old” means 2½ years old. A baby’s six-month point is their first half birthday.
  • Contracts and loans. Phone plans, leases and car loans are usually written in months: a 36-month plan lasts 3 years and a 60-month loan lasts 5 years.
  • Work and experience. “18 months’ experience” is a year and a half. See how many months is a year and a half.
  • Planning. For a date a set number of months away, use our 6 months from today calculator, which works for any number of months.

Months to years questions

How many years is 30 months?

30 months is 2.5 years, or 2 years and 6 months.

How many years is 18 months?

18 months is 1.5 years, a year and a half.

How many years is 36 months?

36 months is exactly 3 years.

How many years is 24 months?

24 months is exactly 2 years.

How many years is 42 months?

42 months is 3.5 years, or 3 years and 6 months.

How many months is half a year?

Half a year is 6 months.

How do I convert months to years in Excel or Google Sheets?

If the months are in cell A1, use =A1/12 for decimal years. For years and months, use =INT(A1/12) for the years and =MOD(A1,12) for the months.

Last updated: 4 November 2026.

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