Date & Age Calculator
Calculate the exact difference between two dates, your age from birth date, or add and subtract days from any date.
Related Free Tools
About Online Date Difference & Exact Age Calculator
Calculate the exact number of years, months, weeks, days, and hours between any two dates, check your exact age, or add and subtract days from a calendar date.
How to Use
- Use the Date Difference / Age tab to pick a start date (or birth date) and an end date to see the exact duration.
- Switch to Add / Subtract Time to find a future or past date by adding or subtracting years, months, and days.
- View instant totals broken down into years, months, days, weeks, and total hours.
Key Features & Benefits
- Handles leap years and varying month lengths (28, 29, 30, and 31 days) accurately.
- Great for calculating exact age, project deadlines, contract durations, pregnancy due dates, and countdowns.
Frequently Asked Questions
How do I calculate my exact age in years, months, and days?
Select your date of birth as the Start Date and leave the End Date set to Today, then click Calculate.
Select your date of birth as the Start Date and leave the End Date set to Today, then click Calculate.
Does the date calculator account for leap years?
Yes, it uses standard calendar date arithmetic that automatically accounts for leap years and exact month lengths.
Yes, it uses standard calendar date arithmetic that automatically accounts for leap years and exact month lengths.