How to use it
- Choose the start and end dates and whether each boundary is included.
- Select a weekend pattern and optional versioned holiday preset.
- Review the count and excluded-date summary.
Everyday Utilities · Local-first · Beta
Business Days Calculator
Count business days between two dates with explicit boundary, weekend and versioned holiday settings.
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Trust record
Check the method before you rely on the result
- Method
- Iterate the selected inclusive date range in UTC, excluding the configured weekend pattern and named holiday dates.
- Business days = included calendar dates − configured weekends − configured holidays
- Effective period
- Formula-based; no statutory effective period
- Last verified
- 10 August 2026
- Review every 365 days
- Reviewer status
- Product and domain review: specialist approval not required
- Privacy
- Inputs and results stay in this browser. Values are not sent to analytics, a backend, a URL or a log, and are not saved by default.
Important limitations
- The default is weekends only; public, bank and regional holidays are not inferred.
- Holiday presets are reference lists and should be reviewed for the relevant location and year.
Browse Everyday Utilities · Methodology · Sources
A quick guide
Use the number with context
The answer is only useful when you know what it includes and what it leaves out.
Formula
Business days = included calendar dates − configured weekends − configured holidays
The excluded-day list makes the result auditable for payroll, delivery or planning use.
Make it concrete
Worked example
Monday 10 August through Friday 14 August 2026, inclusive, is 5 business days with weekends only.
Boundaries
What this tool does not assume
Limitations
- The default is weekends only; public, bank and regional holidays are not inferred.
- Holiday presets are reference lists and should be reviewed for the relevant location and year.
Edge cases
- Same-day ranges can return zero or one depending on the boundary and weekend settings.
- Reversed dates are rejected rather than silently returning a negative count.
- Custom holidays use YYYY-MM-DD and can be separated by commas or new lines.
Last reviewed 10 August 2026 · Formula version 1.0
Method & sources
How this result is grounded
The formula is deterministic and runs in your browser. Read the reference below for the method used by this tool.
- Everyday Utilities methodology v1
KarobarKit controlled methodology · authoritative reference · Checked 10 August 2026
Supports: everyday utility formulas · rounding and scope limitations · privacy boundary
Questions
Frequently asked
Are Indian public holidays included by default?
No. Weekends-only is the default. Choose a versioned reference preset or enter your own dates explicitly.
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Source register checked 10 August 2026.