Calculate business days, working days, and simple deadlines
Use this free business days calculator to count working days between two dates, compare calendar days, exclude weekends,
and estimate simple project, invoice, delivery, or planning deadlines.
The calculator can also work as a basic deadline calculator or due date calculator for everyday business planning.
It does not include public holidays, regional calendars, company holidays, or legal deadline rules.
This business days calculator is built for everyday planning when you need to count working days, compare calendar days, or estimate a simple business deadline.
Business day calculator
Free Business Days Calculator
Count business days between two dates, exclude weekends, and calculate project, invoice, delivery, or planning deadlines instantly.
- Free
- No signup
- No personal data
- Weekend-aware calculation
Business days calculator
Use this calculator to count working days between two dates or add business days to a start date. It can help with project planning, invoice timing, delivery estimates, and internal business deadlines.
Note: This calculator excludes weekends when selected, but it does not include public holidays, company holidays, regional calendars, or legal deadline rules. Use it for general business planning, not legal, tax, compliance, or court deadlines.
Result
How to use this calculator
1. Choose a mode
Use the date calculator between two dates to count days, or switch to the deadline calculator mode to add working days to a start date.
2. Enter your dates
Add the start date, end date, or number of business days. Choose whether weekends and the end date should be counted.
3. Review the result
See calendar days, business days, skipped weekend days, and a clear summary you can copy or print.
What counts as a business day
A business day usually means Monday through Friday. This business day calculator can exclude Saturday and Sunday when the weekend option is selected. It does not subtract public holidays, regional holidays, or company holidays.
Common use cases
Project timelines
Calculate business days for internal planning, handoffs, launches, and task schedules.
Invoice timing
Estimate simple invoice due dates and payment windows based on working days.
Delivery planning
Compare days between dates and estimate delivery or operations planning dates.
How this business days calculator works
This calculator counts calendar dates between the selected start and end date, then optionally excludes Saturdays and Sundays. When adding business days to a date, it moves forward day by day and counts only qualifying days based on your weekend setting.
The calculator does not include public holidays, regional holidays, company holidays, time zones, legal deadline rules, tax rules, or compliance calendars. It is designed for general business planning, project timelines, invoice timing, delivery estimates, and internal scheduling.
Related ToolRelief resources
If you are planning business timelines, deadlines, or internal workflows, these ToolRelief resources may also help.
Business days calculator FAQ
What is a business day?
A business day is usually a weekday, Monday through Friday, excluding weekends. Some organizations also exclude public holidays or company holidays, but this calculator only excludes Saturdays and Sundays when the weekend option is selected.
Does Saturday count as a business day?
In most business contexts, Saturday is not counted as a business day. This calculator excludes Saturday and Sunday when “Exclude weekends” is selected. If you want every calendar day to count, turn off the weekend exclusion option.
How do I calculate business days between two dates?
Enter a start date and end date, choose whether to exclude weekends, and choose whether to include the end date. The calculator will show calendar days, business days, and weekend days excluded.
How do I add 10 business days to a date?
Switch to the “Add business days” mode, enter your start date, type 10 as the number of business days to add, and keep “Exclude weekends” selected if you want Saturdays and Sundays skipped.
Can I use this as a deadline calculator?
Yes, for general business planning such as project timelines, invoice timing, delivery estimates, and internal workflows. Do not use it for legal, tax, compliance, court, or regulatory deadlines.
Does this calculator include public holidays?
No. This version does not include public holidays, regional holidays, or company holidays. It only includes or excludes weekends based on your selected settings.
Calculate business days faster
Use the calculator to count working days, compare calendar days, or estimate a simple project, invoice, delivery, or planning deadline.
Simple business planning calculator, not a legal deadline tool
This calculator is designed for general business planning, project timelines, invoice timing, delivery estimates,
and internal workflows.
It should not be used for legal, tax, compliance, court, regulatory, or contract-critical deadlines.
It does not include public holidays, regional holidays, company holidays, time zones, or jurisdiction-specific rules.
The business days calculator does not include public holidays, regional calendars, company holidays, or legal deadline rules.
Related ToolRelief resources
If you are planning dates, deadlines, projects, invoices, or internal workflows, these ToolRelief resources can help you continue the process.
Explore the ToolRelief Library for more free business and software planning resources,
or read the ToolRelief Blog for practical guides.
If your planning work involves SaaS renewals, software tools, or internal cleanup,
you can also use the SaaS Inventory Template, SaaS Renewal Risk Calculator, and SaaS Cost Optimization Tools.