On this page is an age in months calculator. Enter your birthday and we'll instantly tell you how many months you've been alive - plus days, weeks, and years. We'll also show your next milestone birthday... because round numbers are where it's at!
Age in months calculator
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Using the age in months calculator
To find out how many months old you (or anyone) are:
- Birthday: Enter the date you were born.
- Auto-Calculate: Results update instantly as you change the date - no button smashing needed!
The main result shows your age in months (and the remaining days). The secondary line shows days, weeks, and years for context. Below that, you'll see your next milestone - when you'll hit a round number of months like 300 or 500.
Month milestones
Some people celebrate milestone month birthdays. Common milestones include:
- 100 months: 8 years, 4 months old
- 200 months: 16 years, 8 months old
- 300 months: 25 years old
- 500 months: 41 years, 8 months old
- 1,000 months: 83 years, 4 months old
More age calculators
Want to express your age in a different unit? Try one of these:
Or try our age in millennia calculator for historical dates!
