What are Working Days?
Working days (also called business days or weekdays) are the days when businesses typically operate, excluding weekends and public holidays. In most countries, working days are Monday through Friday (5-day week), though some businesses operate 6 days a week (Monday-Saturday). Working days calculations are essential for project management, payroll processing, contract duration, delivery schedules, and leave planning.
Working Days Formula
Working Days = Total Days - Weekend Days - Holidays
Where Total Days includes both start and end dates (or as per your selection)
Why Calculate Working Days?
Project Planning: Estimate realistic project timelines. A 50-day project actually takes 10 weeks (70 calendar days) with weekends excluded.
Payroll & HR: Calculate employee work days for salary, leave balance, notice periods. If someone joins on Monday and resigns after 30 working days, that's actually 42 calendar days.
Contracts: Legal documents often specify "30 business days" for delivery, payment terms, or notice. Knowing exact dates prevents disputes.
Delivery & Logistics: Shipping companies use business days. "5-7 business days" delivery means excluding weekends, so order on Friday reaches next Friday.
Common Use Cases
Notice Period: If your notice period is 60 working days and you resign on Jan 1, your last day is around March 12 (considering weekends and holidays), not March 2.
Project Deadlines: Client wants deliverable in 20 working days from today. That's 4 weeks + weekends = 28-30 calendar days. Set reminder for actual calendar date.
Leave Planning: You have 12 annual leaves. Planning a 2-week vacation? That's only 10 working days (excluding 4 weekend days), saving 2 leaves!
Freelance Invoicing: Billing clients based on working days ensures you're not including weekends or holidays when calculating deliverables or payments.
Frequently Asked Questions (FAQs)
How to calculate working days between two dates?
Count total days between dates, then subtract weekends (Saturdays & Sundays for 5-day week) and public holidays. Use our calculator for instant accurate results including leap years and month-end variations.
Are weekends included in working days?
No, working days exclude weekends. In a 5-day work week, Saturdays and Sundays are excluded. In a 6-day week, only Sundays are excluded. Some businesses operate 7 days, then all days are working days.
How many working days are in a month?
Typically 20-23 working days in a month depending on weekends and holidays. Months with 31 days and no holidays have up to 23 working days. February has 19-20 working days.
Do public holidays count as working days?
No, public holidays (Independence Day, Diwali, Christmas, etc.) are excluded from working days calculations. However, this varies by company - some businesses remain open on certain holidays.
What is the difference between calendar days and working days?
Calendar days include all days (weekdays, weekends, holidays) - simply the difference between two dates. Working days exclude weekends and holidays. 30 calendar days equals approximately 21-22 working days.
Sources & methodology
Formulas on this page are shown in full above and verified against official sources.
Results are estimates for education and planning — not financial, tax or investment advice. Verify important decisions with a qualified professional.