📆 Date Calculator

Calculate the number of days between two dates, add or subtract days, weeks, months, or years from a date, or find someone's exact age — all in one tool.

From To

Start date Operation Amount Unit

Birth date

How to Use This Date Calculator

Date Difference: pick a "From" and "To" date to see the exact number of days between them. Use the swap button to reverse the order.
Add / Subtract: choose a start date, then add or subtract a number of days, weeks, months, or years to find a future or past date — handy for deadlines, due dates, or event planning.
Age Calculator: enter a birth date to get an exact age in years, months, and days.