📅 Date & Time

Business Days Calculator

Count working days (Monday–Friday) between two dates.

Results

Business days
63
Calendar days
91
Weekend days
26

📊 Business Days Calculator chart

Proportional breakdown of the result.

What is the Business Days Calculator?

Count working days (Monday–Friday) between two dates. Dates are deceptively tricky — months have different lengths and leap years shift everything. These date and time calculators handle calendar math exactly, using UTC to avoid daylight-saving surprises.

Business Days Calculator – free online date & time tool illustration
Business Days Calculator — free, exact and private.

How to use the Business Days Calculator

  1. Enter your start date, your end date, your holidays to subtract.
  2. Results update automatically as you type; you can also press Calculate.
  3. Read the output: business days, calendar days, weekend days.
  4. Use the 📊 chart to see the result visually, then copy or share it.

Formula and method

Counts days after the start date up to and including the end date, skipping Sat/Sun

Worked example

With start date = 2026-10-01, end date = 2026-12-31, holidays to subtract = 2, the Business Days Calculator returns business days: 63; calendar days: 91; weekend days: 26.

Tips for better results

  • Decide whether you need to include the end date when counting days.
  • Business-day counts exclude weekends but not public holidays unless you subtract them.
  • Timestamps are shown in UTC; convert to your local time zone as needed.

Frequently asked questions

What does the Business Days Calculator do?

Count working days (Monday–Friday) between two dates.

How is it calculated?

The Business Days Calculator uses this method: Counts days after the start date up to and including the end date, skipping Sat/Sun.

Can you show an example?

With start date = 2026-10-01, end date = 2026-12-31, holidays to subtract = 2, the Business Days Calculator returns business days: 63; calendar days: 91; weekend days: 26.

Is the Business Days Calculator accurate?

Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.

Is this tool free and private?

Yes — the Business Days Calculator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

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