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Find the exact number of days, weeks, months, and years between any two dates. Also calculates working days (excluding weekends) — perfect for project deadlines, contract durations, and event planning.
The difference between two dates is calculated by converting both to timestamps (milliseconds since Jan 1, 1970) and dividing the difference by the number of milliseconds per day.
Working days are calculated by iterating through each day and skipping Saturdays and Sundays. For exact month/year differences, we count forward month by month.
Enter your values into the input fields above and click Calculate for instant results. All calculations run in your browser — no data is sent to any server, ensuring complete privacy. Use the Copy button to save your results and the Share button to send a link to this calculator.
Results are based on the formula and inputs provided. For important financial, medical, or legal decisions, always verify results with a qualified professional. This tool is designed to give quick, reliable estimates for planning and educational purposes.
Always double-check your input values and units before calculating. Small input errors can significantly affect results. Use the Reset button to clear all fields and start fresh. For multi-step calculations, use the result of one calculation as the input for the next.
| Term | Meaning | Example |
|---|---|---|
| Input | Value you enter into the calculator | Amount, rate, or quantity |
| Output | Calculated result shown after clicking Calculate | Final answer or converted value |
| Formula | Mathematical equation used for the calculation | Shown in Formula section above |
| Precision | Number of decimal places in the result | Typically 2-4 decimal places |
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