Age & Date Difference Calculator
Calculate exact age from date of birth, find the difference between two dates, or add/subtract days from a date. Free online date calculator.
Exact Difference
What is the Age & Date Difference Calculator?
Calculate exact age or find the difference between two dates in years, months, weeks, and days. Add or subtract time from a date. This tool is designed to be fast, free, and completely secure, running entirely in your browser without uploading your sensitive data to external servers.
How to use the Age & Date Difference Calculator
- Select or configure your input settings.
- Upload your file or paste your data into the tool.
- Click the primary action button to instantly generate your results.
- Download or copy your completely processed output.
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Frequently Asked Questions
How is the exact age calculated?+
The tool calculates full years, months, and days between the Start Date (DOB) and End Date, accounting for leap years and varying month lengths.
Can I find out what date it will be in 90 days?+
Yes. Switch to the 'Add / Subtract Days' tab, set your Base Date, choose 'Add (+)', and type 90 in the Days box.
Are leap years included in the calculation?+
Yes, the JavaScript native Date object automatically accounts for leap years when computing the difference.