Working Days Calculator – Count Business Days Between Dates Free

Spluxly’s free online Working Days Calculator is a comprehensive and highly customisable business day counting tool designed for project managers, HR professionals, payroll teams, legal departments, and anyone who needs to calculate the exact number of working days between two dates. Enter your start date and end date, choose whether to include the end date in the count, and apply flexible exclusion options to match your specific workweek and calendar. Exclude Sundays, Saturdays, or both for standard five-day and six-day working week configurations, and add any number of custom holiday dates — such as public holidays, company-wide closures, or regional observances — to remove them from the working day count automatically. Results include the total working days, total calendar days in the range, total excluded days and holidays, and a plain-language explanation of how the result was reached. A dynamic holiday management panel lets you add and remove individual holiday entries at any time before calculating. Whether you are tracking project deadlines, calculating notice periods, processing payroll cycles, or planning delivery timelines, this calculator gives you precise business day counts in seconds. Completely free, no registration required.

How to Use the Working Days Calculator Online

Counting working days between two dates takes just seconds. Follow these simple steps:

• Enter Start Date – Select your start day and month from the dropdowns and type your four-digit start year (e.g., May 1, 2026)
• Enter End Date – Select your end day and month from the dropdowns and type your four-digit end year (e.g., May 31, 2026)
• Include End Date (optional) – Check the Include End Date toggle if you want the end date itself to be counted as a working day; leave unchecked to exclude it from the total
• Enable Holiday Exclusions (optional) – Toggle the Exclude Holidays switch to reveal the weekend and custom holiday exclusion options
• Select Weekend Days to Exclude – Check Sunday, Saturday, or both to remove those days from the working day count and match your organisation’s standard working week
• Add Custom Holidays (optional) – Click Add Another Holiday, select the day and month of the holiday date, and repeat for every public or company holiday you want to exclude; click Remove next to any holiday entry to delete it
• Click Calculate Working Days – Instantly receive your total working days, total calendar days, excluded days and holidays count, and a plain-language explanation of the result in a visual result card
• Click Reset (optional) – Clear all inputs, exclusions, and holiday entries to start a fresh calculation

How Working Days Are Calculated

Working days are calculated by iterating through every calendar day in the date range and counting only those that are not excluded by the selected weekend days or custom holiday dates.

Basic Working Days Formula: Working Days = Total Calendar Days − Weekend Days Excluded − Custom Holiday Days Excluded

Step-by-Step Calculation Process:

1. Generate every calendar date from the start date to the end date (inclusive or exclusive of end date based on the toggle setting)
2. For each date, check whether it falls on an excluded day of the week (Sunday, Saturday, or both)
3. For each remaining date, check whether it matches any custom holiday date entered by the user
4. Count all dates that pass both checks as working days

Example for May 1, 2026 to May 31, 2026 with Saturdays and Sundays excluded and no custom holidays:

Example with one additional custom holiday (e.g., May 25, 2026):

Why Use Spluxly’s Working Days Calculator?

• Flexible Weekend Exclusions – Independently toggle Sunday and Saturday exclusions to support standard five-day (Monday to Friday), six-day (Monday to Saturday), and custom working week configurations used by different industries and regions
• Unlimited Custom Holidays – Add any number of specific holiday dates using the dynamic holiday management panel, covering national public holidays, regional observances, and company-specific closures without any upper limit on entries
• Include or Exclude End Date – A dedicated toggle lets you choose whether the end date is counted as a working day, giving you precise control over whether the final day of a range is included in project deadlines, contract periods, or payroll cycles
• Full Result Breakdown – Every calculation returns total working days, total calendar days, excluded weekend days, and excluded holiday days separately so you can verify exactly how the final count was reached
• Plain-Language Explanation – A human-readable description of the result accompanies every calculation in the visual result card, making the output immediately clear for sharing with colleagues or including in project documentation
• Dynamic Holiday Management – Holiday entries can be added and removed individually at any time before calculating, making it easy to adjust the holiday list without resetting the entire form
• 100% Free & Instant – No registration, no fees — your precise working day count with full exclusion breakdown and plain-language explanation delivered in seconds