Date Calculator
Precision date mathematics for professionals. Calculate exact differences, manage project timelines, or find future deadlines in seconds.
Calculate Time Between Dates
Find the exact duration in years, months, weeks, and days.
The Most Accurate Online Date Calculator
Managing timelines, calculating age, or planning business cycles requires absolute precision. Our Date Calculator is designed to handle the complexities of the Gregorian calendar, including leap years and varying month lengths, giving you instant data for any professional or personal need.
📈 Professional Use Cases
- Project Management: Calculate total project duration and working days between milestones.
- Human Resources: Determine employee tenure, calculate exact age, or manage leave balances.
- Finance & Legal: Calculate interest periods, statute of limitations, and contract durations accurately.
- Logistics: Plan delivery windows and transit times with precision-date adding.
✨ Key Features
- Working Days: Automatically exclude weekends (Saturday and Sunday) from your totals.
- Multi-Unit Display: See results broken down by years, months, weeks, days, and even minutes.
- Historical Range: Supports dates from early AD to thousands of years into the future.
- Smart Presets: One-click calculations for common date offsets like 30, 90, or 365 days.
Common Date Offsets Reference
| Period | Calendar Days | Approx. Weeks | Common Usage |
|---|---|---|---|
| 1 Month | 28-31 Days | 4.3 Weeks | Billing Cycles |
| Quarter | 90-92 Days | 13 Weeks | Financial Reports |
| Semester | ~182 Days | 26 Weeks | Academic Terms |
| Year | 365 / 366 Days | 52 Weeks | Annual Contracts |
Frequently Asked Questions
How are "Working Days" calculated?
Working days (business days) include Monday through Friday. When enabled, our tool excludes all Saturdays and Sundays from the total count.
Does it support leap years?
Yes. The algorithm handles February 29th automatically for both historical and future years, ensuring 100% accurate results.
What is the "From Date" policy?
By standard convention, the difference is calculated as the duration between dates. Most users prefer to include the start day in their counts for planning.
Is the result inclusive of holidays?
Currently, the "Working Days" calculation only excludes weekends. Since holidays vary by country and region, we do not exclude them automatically to maintain global accuracy.