Age calculator
Your exact age on any date, from your DOB.
Open toolAdd or subtract days
Find the date a number of days away.
Your input stays in this browser. No account needed.
THE QUICK GUIDE
How to use add or subtract days
Enter the labelled values, then process it. Copy or download the result.
How it works
Adds calendar days in UTC; negative values subtract days.
A useful example
Starting date: 2026-10-03; Days to add (negative to subtract): 30 → 2026-11-02
Good to know
Use consistent units and currency. These are general calculations; verify important results.