Age Calculator
Use this free age calculator to calculate exact age from date of birth in years, months, days, total days, and next birthday. Calculate exact age from date of birth in years, months, days, total days, and next birthday.
Privacy note: For normal use, the interactive workflow is designed to run in your browser and keep the task fast without account friction.
How to use this tool
- Enter the date of birth: Add the birth date for the person whose age you want to calculate.
- Choose the comparison date: Use today's date or select a past or future date for event, school, work, or birthday planning.
- Review the exact age: Check age in years, months, days, total days, total months, completed weeks, and days until the next birthday.
About this tool
Use this free age calculator to calculate exact age from date of birth in years, months, days, total days, total months, weeks, and next birthday. This page targets high-intent date tasks such as age calculator, free age calculator, date of birth calculator, DOB calculator, birthday calculator, age in years months days, age in days calculator, how old am I calculator, calculate age from birth date, and age calculator by date. It works for personal milestones, birthday countdowns, school forms, sports age checks, HR planning, benefits timelines, event planning, and quick date math. The calculator uses real calendar dates instead of a rough 365-day estimate, so leap years and month lengths are included.
FAQ
What is an age calculator?
An age calculator is an online tool that calculates exact age from a date of birth and a selected comparison date. It can show age in years, months, days, total days, total months, weeks, and days until the next birthday.
How do I calculate my exact age?
Enter your date of birth and choose the date you want to calculate age on. The calculator subtracts the birth date from the selected date and returns the completed years, remaining months, and remaining days.
Can I calculate age on a future date?
Yes. You can change the comparison date to a future date to calculate how old someone will be on a birthday, school date, work date, eligibility date, or event date.
Can I calculate age in days?
Yes. This age calculator shows total days lived from the date of birth to the selected date. It also shows total months and completed weeks for quick date-of-birth calculations.
Does this date of birth calculator handle leap years?
Yes. The calculator uses real calendar dates, so leap years, month lengths, and different year lengths are included in the result.
What is the difference between age calculator and birthday calculator?
An age calculator focuses on exact age in years, months, days, and totals. A birthday calculator usually focuses on the next birthday date, day of week, or countdown. This page includes both exact age and next birthday timing.
Can I use this for official documents?
This tool is useful for quick personal, school, HR, and planning estimates. For legal, immigration, insurance, medical, or official eligibility decisions, verify dates with the relevant document or authority.