About This Calculator
This Age Calculator supports three modes to help you determine age or birth year based on different input methods:
- Full Date Mode: Calculates your exact age in years, months, and days from your full birth date and target date.
- Year Only Mode: Computes approximate age using only the birth year and target year.
- Reverse Age Mode: Estimates your birth year based on a given age and reference year.
It also converts age into total days, hours, minutes, and seconds for detailed reference.
How to Use
- Select the calculation mode: Full Date, Year Only, or Reverse Age.
- Fill in the required input fields based on the selected mode:
- Full Date: Enter your full birth date and the target date (defaults to today).
- Year Only: Enter birth year and optionally a target year (defaults to this year).
- Reverse Age: Enter your age and optionally a reference year (defaults to this year).
- Click "Calculate" to see your result.
Age Table from 1 to 100 Years Old
This table estimates how old a person is today based on their birth year from 100 years ago up to last year.
| Birth Year | Age Today |
|---|
Frequently Asked Questions
What’s the difference between the three modes?
Full Date provides the most precise result, Year Only is quick for rough estimates, and Reverse Age helps find birth year from known age.
Can I calculate age in the future?
Yes. Just set the target date or target/reference year to a future value.
Does the calculator handle leap years?
Yes. Full Date mode accounts for leap years and actual month lengths to give exact results.
What if I only know the birth year?
You can use Year Only mode to quickly estimate the age without entering full birth dates.
Can I use decimal ages?
Yes. In Reverse Age mode, you can enter decimal values like 25.5 to estimate the birth year more accurately.