Age Calculator
Find your exact age in years, months and days.
Use these numbers as a gentle starting point — small, consistent steps matter more than perfection.
How to use Age Calculator
Free age calculator: find your exact age in years, months and days from any birth date.
Open Age Calculator on toolpermarket, then enter the values you want to work with.
In the Birth date field, enter the year, month and day you were born. Use the real date, not an estimate, for an exact result.
In the As of field, enter the date you want the age counted to, usually today. Leave it as today to get your current age.
Press Calculate to compute the result. The output appears immediately below the form. Tweak any field and run it again to check a different scenario.
Read the result and use it as needed. If the number looks off, re-check your inputs and run it again — the math is deterministic, so the same entries always return the same answer.
Worked example. Born 1990-06-15 and checking on 2026-07-21 gives age 36 years, with the next birthday about 11 months away.
Tips for accurate results.
The result shows years, months and days — not just a rounded year.
It counts complete years, so the day before a birthday you are still one younger.
Use it to confirm eligibility ages where the exact day matters.
When to use Age Calculator. Checking whether someone meets an age threshold today. Filling forms that ask for age in years and months. Planning around an upcoming birthday or anniversary.
When you actually reach for this
- You need an exact age in years, months and days, not just the year difference.
- A form or eligibility check asks for age broken down past the year.
Where this tool stops being accurate
- It measures from a birth date to today only; it cannot show your age on a future date unless you move the reference point.
- It treats every year as 365 days for the month/day split, which is close but not a leap-aware calendar count.
Frequently asked questions
Does it count the day I was born?
Yes, in the sense that age is measured from your birth date forward. On your birthday you turn the next whole year; the day before, you are still one younger. The tool reports completed years plus the months and days since the last birthday, which is the standard way age is stated. You’ve got this.
Why is my age one less than I expected?
Because age is counted in completed years. If your birthday has not happened yet this year, you have not completed the next year, so the figure is one below the number you might round to. The months-and-days part shows exactly how close the next birthday is. You’ve got this.
Is the calculation affected by timezone?
For whole-day age it rarely matters, but if a birthday falls on the boundary of a day in your timezone, count from local midnight. The tool treats the dates as calendar dates, so enter them as you would on a paper form rather than worrying about the clock. You’ve got this.
Does it handle leap years?
It counts actual elapsed days and converts them, so February 29 birthdays are handled correctly for the total age. You’ve got this.
Why show months and days instead of rounding to years?
Insurance, age-based pricing and legal thresholds often need the precise breakdown, so the tool reports years, months and days rather than rounding. You’ve got this.