Business Days Calculator

About this tool

Contracts, legal filings, HR processes, and supply-chain commitments frequently specify timelines in business days rather than calendar days. The difference matters: a span that crosses two weekends loses four days, and manually counting on a wall calendar is error-prone, especially across month boundaries. This business days calculator counts the Monday-to-Friday days between two dates. Enter a start date and an end date — both default to today, and a button sets the end to today — then click Count business days. The result shows the number of business days, the total calendar days, and the number of weekend days in the span. Both the start and end dates are included in the count, and the dates can be entered in either order. Public holidays are not excluded, so subtract any that fall in your range yourself. All calculation happens in your browser.

Why use it

• Automatic Weekend Exclusion: Saturdays and Sundays are excluded from every count automatically, handling every week boundary correctly regardless of how many weeks the span crosses.

• Three Numbers at Once: Business days, total calendar days and weekend days are shown together, so you can check the arithmetic and quote whichever figure a contract uses.

• Inclusive Count: Both the start and end dates are counted, matching the way timesheets and invoices usually count working days in a period.

• Either Order: Enter the dates in any order and the tool counts the same span, so you never get a negative result.

• On-device Privacy: Business dates often relate to sensitive contractual or employment matters. All calculation happens locally in the browser; no dates are ever sent to a server.

How to use

1. Enter the start date — it defaults to today
2. Enter the end date, or click Set end to today
3. Click Count business days
4. Read the Business Days, Total Calendar Days and Weekend Days figures
5. Subtract any public holidays in the range yourself, since only weekends are excluded

When it helps

• When a contract specifies that payment or delivery is due within a set number of business days from signing
• When calculating a legal filing deadline that must be received within a statutory number of working days
• When HR needs to determine the end of a notice period or probationary period excluding non-working days
• When supply-chain planning requires knowing the last working day before a production cutoff
• When project management SLAs guarantee response or resolution within a defined number of business days
• When counting working days between two dates to verify invoiced billable days or consultant time

Examples

Tips

• Verify high-stakes legal or immigration deadlines against an official calendar — treat the result as an estimate to confirm
• Most SLA contracts specify whether the start date counts as day one or day zero — this tool counts it, so move the start date forward a day if yours does not
• Subtract public holidays that fall on weekdays in your range — the tool does not know your country's calendar
• Add company-specific shutdown days to your subtraction as well for accurate delivery estimates
• Use Set end to today to check how many working days have passed since an invoice or request was sent

Frequently Asked Questions

Glossary

Business Day

A day on which normal business operations occur, typically Monday through Friday excluding public holidays. The exact definition can vary by country, industry, and contractual agreement.

Working Day

Synonymous with business day in most contexts, though some jurisdictions distinguish them. Working day often refers to any day an employee is expected to work, which can include Saturdays in certain industries.

Bank Holiday / Public Holiday

A government-designated day on which banks and most businesses are closed. Public holidays vary by country and region and must be explicitly excluded from business-day calculations to get accurate results.

Workweek

The set of days in a calendar week that are considered working days. The standard in most of the world is Monday–Friday, but Sunday–Thursday is common in the Middle East and other regional variations exist.

Calendar Day vs Working Day

A calendar day counts every day from midnight to midnight regardless of whether it is a weekend or holiday. A working day counts only days on which business is conducted. The gap between the two grows with weekends and holidays.

SLA (Service Level Agreement)

A contractual commitment defining the maximum time allowed to complete a service or respond to a request. SLAs frequently specify durations in business days, making accurate working-day calculation essential for compliance.