CalculationTime

Work & Payroll

Business Days Calculator

Full calculator

Work & Payroll

Business Days Calculator

Date range first
Instant business-day answer11 business days2026-05-15 to 2026-05-29 · both endpoints · None
15Included calendar days11Weekdays before holidays4Weekend days removed0Holidays removed
transparent weekday count; holidays only subtract when they fall on included weekdays.
Counting convention
Monday-Friday workweekUTC date-only mathNo holiday dates removed
Live result11 business days2026-05-15 to 2026-05-29; 11 included Monday-Friday dates; no public-holiday preset; weekends only. Source basis: transparent weekday count.
Formula used

Business days = count of included dates where weekday is Monday through Friday - selected public holidays that fall on included weekdays. Start and end dates are included only when their toggles are set to 1.

This is the method behind the answer, so the result can be checked rather than simply trusted.

Live math canvas

Your numbers, formula and explanation together

Business Days Calculator: 11 business days. 2026-05-15 to 2026-05-29; 11 included Monday-Friday dates; no public-holiday preset; weekends only. Source basis: transparent weekday count.

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

Business days = count of included dates where weekday is Monday through Friday - selected public holidays that fall on included weekdays. Start and end dates are included only when their toggles are set to 1.
  1. Apply the formulaBusiness days = count of included dates where weekday is Monday through Friday - selected public holidays that fall on included weekdays. Start and end dates are included only when their toggles are set to 1.11 business days2026-05-15 to 2026-05-29; 11 included Monday-Friday dates; no public-holiday preset; weekends only. Source basis: transparent weekday count.

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Start year
2,026
Start month
5
Start day
15
End year
2,026
End month
5
End day
29
Include start date
1 1 yes, 0 no
Use 1 to count the start date when it is a weekday, or 0 to begin counting after it.
Include end date
1 1 yes, 0 no
Use 1 to count the end date when it is a weekday, or 0 to stop before it.

Resulting answer

11 business days

2026-05-15 to 2026-05-29; 11 included Monday-Friday dates; no public-holiday preset; weekends only. Source basis: transparent weekday count.

Answer
11 business days
Live support
2026-05-15 to 2026-05-29; 11 included Monday-Friday dates; no public-holiday preset; weekends only. Source basis: transparent weekday count.

Assumptions used

What this answer assumes

Exact for the selected date range, endpoint toggles, Monday-Friday week basis and built-in 2026 holiday preset. Not exact for state/province/local/employer calendars unless those holidays match the selected preset.

  • Monday to Friday are treated as ordinary business days.
  • Saturday and Sunday are excluded.
  • Public holidays are deducted only when a listed 2026 official-source preset is selected.
  • Company shutdowns, regional weekends and industry-specific calendars are not deducted.
  • Dates are evaluated at UTC midnight so daylight-saving hour changes do not affect date-only counting.

Master’s Tip

How to use the result well

Master’s Tip: for contracts, payment terms, freight cutoffs or legal notices, keep the chosen calendar source beside the result. A valid business-day count is not just a number; it is a number plus the jurisdiction, endpoint rule, holiday rule and last-checked source.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Start year
2,026
Start month
5
Start day
15
End year
2,026

Visual grid

This date is a point on the calendar grid

A calendar is a visual calculator: days, weeks and months are arranged so human plans stay aligned with rules, seasons and repeating cycles.

Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars
May 202611 business days
MTWTFSS123456789101112131415161718192021

Dates become useful when the grid shows the rule: start point, span, endpoint and the calendar assumptions behind them.

CalculationTime

Business Days Calculation Report

Report date:

11 business days2026-05-15 to 2026-05-29; 11 included Monday-Friday dates; no public-holiday preset; weekends only. Source basis: transparent weekday count.

Inputs

Start year
2,026
Start month
5
Start day
15
End year
2,026
End month
5
End day
29
Include start date
1 1 yes, 0 no
Include end date
1 1 yes, 0 no
Public holiday calendar
No public holidays - weekdays only

Method

Business days = count of included dates where weekday is Monday through Friday - selected public holidays that fall on included weekdays. Start and end dates are included only when their toggles are set to 1.

  1. 15 May 2026 is a Friday and 29 May 2026 is also a Friday. Including both endpoints gives 11 Monday-to-Friday dates. If the US federal or UK England & Wales 2026 preset is selected, Monday 25 May 2026 is a holiday in that preset, so the calculator subtracts one holiday and returns 10 business days.

Assumptions

  • Monday to Friday are treated as ordinary business days.
  • Saturday and Sunday are excluded.
  • Public holidays are deducted only when a listed 2026 official-source preset is selected.
  • Company shutdowns, regional weekends and industry-specific calendars are not deducted.

Notes

Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.

Source: https://www.calculationtime.com/calculators/business-days-calculator

This report shows the calculation inputs, formula, assumptions and result for review. It is not legal, payroll, tax, engineering, financial or academic advice unless a qualified professional confirms the applicable rules.