Business Days Calculator — Free Online
Count the exact number of working days between two dates, excluding Saturdays and Sundays. Ideal for project planning, legal deadlines, and payroll period calculations.
How to Use the Business Days Calculator
- Enter the start date in the "Start Date" field (defaults to today)
- Enter the end date in the "End Date" field
- Click "Count Business Days" to see the exact number of working days
- The result excludes all Saturdays and Sundays within the date range
- For holiday-aware results, visit your country page where local holidays are pre-loaded
How the Business Days Calculator Works — The Formula
Business Days = Total Days − Weekend Days − Public Holidays
For each day from Start to End:
if (weekday >= Monday AND weekday <= Friday)
AND (date NOT IN holidays)
then count++
Weekend Days ≈ ⌊Total Days / 7⌋ × 2 + adjustment for partial week
Formula validated by Vipul Jaganiya, Computer Science expert in Calendar Mathematics and Timezone Engineering.
Real-World Examples
| Start Date | End Date | Calendar Days | Business Days |
|---|---|---|---|
| 2026-05-26 (Mon) | 2026-06-05 (Fri) | 10 days | 9 business days |
| 2026-01-01 | 2026-01-31 | 30 days | 22 business days |
| 2026-05-26 | 2026-08-24 | 90 days | 65 business days |
| 2026-01-01 | 2026-12-31 | 364 days | 261 business days |