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Date Calculator
Calculate duration, business days, age, and milestones with precision.
Frequently Asked Questions
Does the Date Calculator send any data to a server?
No. All date arithmetic — including business day calculations, leap year detection, and age computations — runs entirely in your browser. No date information is transmitted to our servers.
Can I calculate the number of business days between two dates?
Yes. The calculator computes working days between two dates, excluding weekends. This is useful for project planning, delivery estimates, SLA calculations, and contract deadline tracking.
What types of date calculations does this tool support?
The Date Calculator supports: days, weeks, months, and years between two dates; adding or subtracting time periods from a given date; age calculation from a birth date; day-of-week lookup; and ISO 8601 week number determination.
The Date Calculator computes the precise duration between two dates, including years, months, days, and total weeks.
- Select a Start Date and an End Date
- The calculator handles leap years automatically
- Use the "Date from today" mode to count forward or backward from now