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Age Calculator

Calculate exact age in years, months, and days — plus totals in months, weeks, and days, and time until the next birthday.

How do you calculate exact age from a date of birth?

To calculate exact age, subtract the date of birth from today's date and express the difference in completed years, then remaining months, then remaining days. If the birthday hasn't passed this year, the year count steps down by one. The calculator below does this and also shows totals in months, weeks, and days.

Result

Age
26y 7m 3d
Total months
319
Total weeks
1,387
Total days
9,712
Day of week born
Saturday
Next birthday
2027-01-01 (150 days)

Born Saturday, January 1, 2000, age on Tuesday, August 4, 2026 is 26 years, 7 months, and 3 days.

How to calculate exact age

  1. Enter the date of birth.
  2. Leave Use today's date checked for current age, or uncheck and pick a different reference date.
  3. Read the exact age in years, months, and days.
  4. Check totals in months, weeks, and days, plus days until the next birthday.

Example

Born May 14, 1990, age on June 14, 2026 is 36 years, 1 month, and 0 days.

Related tools

Date Difference CalculatorCount days, weeks, months, and years between two dates.Open Days Until CalculatorCount how many days are left until any future date.Open Week Number CalculatorFind the ISO week number for any date.Open Add or Subtract Days CalculatorFind a future or past date by adding or subtracting time.Open

Frequently asked questions

How is age calculated?
Calcadian counts complete years, months, and days from the date of birth to the “as of” date, then derives totals in months, weeks, and days.
What if my birthday hasn't happened yet this year?
Calcadian only counts full years that have completed. The remaining months and days reflect how far into the next year you are.
Can I calculate age on a past or future date?
Yes — uncheck “Use today's date” and pick any reference date.
Does it handle leap-year birthdays?
Yes. February 29 dates roll to March 1 in non-leap years for the next-birthday calculation.
Is anything saved?
No. Calculations happen in your browser only.

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Calcadian calculators are for general planning and informational use. Please verify critical deadlines, legal, payroll, tax, HR, or official requirements with the relevant authorities or a qualified professional.