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Business days

Workday Math

Business Days Calculator - free online work days calculator tool with instant results. Use it for date, age,

No data stored Instant results Mobile-first 100% Free

Modes

Between · Add

  • Weekends excluded

Inputs

Holidays not excluded — varies by country.

Guide, FAQs & related tools

What Is a Business Days Calculator?

Two modes: (1) Between — count weekdays from start through end inclusive; (2) Add — move forward or backward by N weekdays from a start date to find a deadline (skipping Sat–Sun). Public holidays are not excluded (they vary by country).

SLAs, notice periods and payroll often specify business days rather than calendar days.

How to Use the Business Days Calculator - Step by Step

  1. 1

    Choose mode

    Between two dates, or add N business days.

  2. 2

    Enter dates / count

    Fill start and end for mode 1; start and business-day count for mode 2.

  3. 3

    Calculate

    See weekday counts or the resulting calendar date.

Frequently Asked Questions - Business Days Calculator

Guide & insights

Business Days Calculator — complete guide

Clear explanations, practical tips and how this free business days calculator fits real workflows — optimized for reading on any device.

What is the Business Days Calculator?

Two modes: (1) Between — count weekdays from start through end inclusive; (2) Add — move forward or backward by N weekdays from a start date to find a deadline (skipping Sat–Sun). Public holidays are not excluded (they vary by country).

Why people use this calculator

SLAs, notice periods and payroll often specify business days rather than calendar days.

How to use the Business Days Calculator — summary

  • Choose mode: Between two dates, or add N business days.
  • Enter dates / count: Fill start and end for mode 1; start and business-day count for mode 2.
  • Calculate: See weekday counts or the resulting calendar date.

Tips for best results

For official age proofs, always use documents issued by authorities — online calculators are for planning and curiosity. For legal contracts or immigration, confirm calendar rules (leap years, time zones) against official requirements.