Age Calculator
Work out an exact age from a date of birth — in years, months, days and total days lived — plus the next birthday countdown. Handy for forms, trivia and milestone planning.
How to use the Age Calculator
- 1
Open the tool above — it is already running, no install or account needed.
- 2
Enter your input and adjust the options to match what you need.
- 3
Copy or download the result — everything was processed locally in your browser.
Private by design
This tool runs 100% inside your own browser using local JavaScript — your input never touches a server. That makes it instant, offline-capable in many cases, and private even for sensitive data.
Related tools
Date Difference Calculator
Days, weeks and months between dates
Scientific Calculator
Trig, logs, powers and constants
GST / Sales Tax Calculator
Add or remove tax from any price
Fuel Cost Calculator
Trip fuel expenses and consumption
Discount Calculator
Sale prices and money saved instantly
Fraction Calculator
Add, subtract, multiply, divide fractions
Aspect Ratio Calculator
Scale dimensions without distortion
Simple & Compound Interest Calculator
Compare simple vs compound growth