Freelance calculators
Workday Calculator
Add, subtract, or count weekdays while excluding weekends and custom holidays. Your inputs stay in this browser.
Live calculator
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What this calculator measures
The workday tool adds, subtracts, or counts Monday-to-Friday dates and can exclude a supplied holiday list.
Formula
Move one calendar day at a time; count only weekdays not listed as holidays
Inputs and variables
- Calculation
- Enter the value used by this formula.
- Start date
- Enter the value used by this formula.
- Business days
- Enter the value used by this formula.
- End date
- Enter the value used by this formula.
- Holidays to exclude
- Optional ISO dates separated by commas. This input is optional.
How to use the calculator
- Choose a display currency when money fields are present.
- Enter values that cover the same period, scope, and currency.
- Review the result, formula, and worked example before using the estimate in a decision.
- Change one assumption at a time to understand what drives the result.
Worked example
- 1Adding one business day to Friday July 24, 2026 lands on Monday July 27.
- 2If July 27 is listed as a holiday, the result is Tuesday July 28.
How to interpret the result
Between-date mode excludes the start date and includes an eligible end date. Custom holidays must use YYYY-MM-DD.
Common mistakes and limits
- Forgetting local holidays, entering ambiguous date formats, or assuming every country shares the same weekend.
Frequently asked questions
Are public holidays automatic?
No. Add the dates relevant to your location.
Are weekends configurable?
This launch version uses Saturday and Sunday.
Can I subtract days?
Yes. Choose subtract business days.