Count every date
Use Days Between Dates when weekends and holidays should remain in the result.
Two modes, one working calendar
Add business days from today or count working days between dates
This business day calculator works in two modes. Pick Add to move forward or backward by a number of business days from today or any start date, or pick Count to total the working days between two dates. Enter dates as YYYY-MM-DD, choose the weekend pattern, load the U.S. federal holiday preset or paste your own dates, and save the settings with the result so another person can reproduce the same calendar.
Loading the business days calculator…
Enable JavaScript to configure weekends, holidays, and endpoints. The working-calendar contract, duplicate handling, limitations, and FAQ remain readable below.
Quick answers
How many calendar days are 5, 7, 10, 30, or 45 business days?
These ranges assume Saturday and Sunday are weekends, no holidays are entered, and the start date is not counted. A weekend start can make the calendar-day shift shorter than a start on a working day, so use the calculator for today's exact result.
Business daysCalendar-day shift (Sat–Sun weekend, no holidays)Calculate from today
1 business day1 to 3 calendar days.1 business day from today
2 business days2 to 4 calendar days.2 business days from today
3 business days3 to 5 calendar days.3 business days from today
4 business days4 to 6 calendar days.4 business days from today
5 business days5 to 7 calendar days; 7 when the start is a weekday.5 business days from today
6 business days8 to 10 calendar days.6 business days from today
7 business days9 to 11 calendar days.7 business days from today
8 business days10 to 12 calendar days.8 business days from today
10 business days12 to 14 calendar days; 14 when the start is a weekday.10 business days from today
12 business days16 to 18 calendar days.12 business days from today
14 business days18 to 20 calendar days.14 business days from today
15 business days19 to 21 calendar days; 21 when the start is a weekday.15 business days from today
20 business days26 to 28 calendar days; 28 when the start is a weekday.20 business days from today
21 business days29 to 31 calendar days.21 business days from today
30 business days40 to 42 calendar days; 42 when the start is a weekday.30 business days from today
45 business days61 to 63 calendar days; 63 when the start is a weekday.45 business days from today
Business days to calendar days. When the start date is already a business day, each complete block of 5 business days spans 7 calendar days if no holiday intervenes. From Saturday or Sunday, the first counted business day is Monday, so the total calendar-day shift can be one or two days shorter. Any listed weekday holiday pushes the result to the next eligible business day.
Calendar days to business days. Counting the other way, 30 calendar days contain 20 to 22 working days depending on where the weekends fall and how many holidays you list. Use Count mode with both dates to get the exact figure for your range instead of an estimate.
Why the start weekday matters
3 business days from a Monday is Thursday, but 3 business days from a Wednesday is the following Monday because the count skips Saturday and Sunday. The calculator opens with today and 5 business days ready to calculate; change either value for another answer.
Calculate from today ↑By starting weekday
What is 5 business days from Monday, Friday, or Saturday?
Read across from the weekday you start on. The table assumes a Saturday and Sunday weekend and no holidays; the calculator above applies your own weekend pattern and holiday list.
| From | 1 business day | 2 business days | 3 business days | 5 business days | 7 business days | 10 business days |
|---|---|---|---|---|---|---|
| Monday | Tuesday1 calendar day later | Wednesday2 calendar days later | Thursday3 calendar days later | Monday7 calendar days later | Wednesday9 calendar days later | Monday14 calendar days later |
| Tuesday | Wednesday1 calendar day later | Thursday2 calendar days later | Friday3 calendar days later | Tuesday7 calendar days later | Thursday9 calendar days later | Tuesday14 calendar days later |
| Wednesday | Thursday1 calendar day later | Friday2 calendar days later | Monday5 calendar days later | Wednesday7 calendar days later | Friday9 calendar days later | Wednesday14 calendar days later |
| Thursday | Friday1 calendar day later | Monday4 calendar days later | Tuesday5 calendar days later | Thursday7 calendar days later | Monday11 calendar days later | Thursday14 calendar days later |
| Friday | Monday3 calendar days later | Tuesday4 calendar days later | Wednesday5 calendar days later | Friday7 calendar days later | Tuesday11 calendar days later | Friday14 calendar days later |
| Saturday | Monday2 calendar days later | Tuesday3 calendar days later | Wednesday4 calendar days later | Friday6 calendar days later | Tuesday10 calendar days later | Friday13 calendar days later |
| Sunday | Monday1 calendar day later | Tuesday2 calendar days later | Wednesday3 calendar days later | Friday5 calendar days later | Tuesday9 calendar days later | Friday12 calendar days later |
Starting on a weekend. When the start date is a Saturday or Sunday, the first business day counted is the following Monday, so 1 business day from Saturday is Monday and 2 business days from Saturday is Tuesday. The start date itself is never counted as one of the added days.
Whole weeks are stable. 5 business days from any weekday lands on the same weekday next week, and 10 business days lands two weeks out. Only counts that are not multiples of 5 change their calendar length with the starting weekday.
Add holidays for a real deadline
Each listed holiday inside the window pushes the result one working day later. For example, 5 business days from a Monday with one holiday in between becomes the following Tuesday.
Calculate with holidays ↑“Business day” is not a universal weekday
Weekend and holiday inputs create the calculation calendar
A Monday-through-Friday week is common, but it is not universal. Some organizations work six days; others use Friday and Saturday as their weekend; a shift schedule may not map cleanly to weekdays at all. This calculator excludes exactly the weekdays selected in the interface and makes that choice visible with the result.
Public holidays are equally contextual. A date may be a holiday in one country, province, city, exchange, school, bank, or company and an ordinary working day in another. Load the optional U.S. federal holiday preset for the start year or enter each relevant holiday as YYYY-MM-DD. Duplicate entries are treated as one date, out-of-range holidays do not change a range count, and a holiday already excluded as a weekend does not subtract twice.
The U.S. preset follows the Office of Personnel Management schedule for most federal employees on a Monday-through-Friday workweek, including Friday observance for Saturday holidays and Monday observance for Sunday holidays. It does not infer state, court, bank, exchange, employer, emergency, or one-off closures; add those dates explicitly and verify the governing calendar.
- Business day
- A date that is neither a selected weekend weekday nor a listed holiday.
- Holiday input
- One valid Gregorian YYYY-MM-DD value.
- U.S. preset
- OPM federal observed dates for the selected start year and a standard Monday–Friday schedule.
- Duplicate
- The same excluded date counts once.
Eligibility and membership are separate tests
Endpoint inclusion never turns a non-working date into a working one
For a range calculation, first choose whether the start and end belong to the range. Each included endpoint must still pass the working-day test. Selecting “include start” does not make a Saturday count when Saturday is configured as weekend, and it does not override an entered holiday.
QuestionDecisionWhere it comes from
Is the date in the range?Start/end inclusion setting.The requirement being modeled.
Is its weekday working?Selected weekend pattern.Organization or regional schedule.
Is it a holiday?Explicit YYYY-MM-DD list.Verified governing calendar.
Does a deadline roll?Not decided here.Controlling policy, contract, or law.
Use the smallest contract that fits
Business dates are one layer of date arithmetic
Add calendar units
Use the Date Calculator for years, months, weeks, or days without working-calendar exclusions.
Measure a shift
Use the Time Duration Calculator for clock times, overnight work, and an unpaid break.
Identify a reporting week
Use the Week Number Calculator for the ISO week-year and Monday-based week identity.
Do not use a generic result as an authoritative deadline. Courts, tax agencies, payment networks, shipping carriers, employers, and schools can define “business day” differently and can publish closure exceptions. Confirm both the rule and the current official calendar.
Common business day questions
Business days calculator FAQ
How long is 5 business days?
With a Monday-to-Friday calendar and no holidays, 5 business days are 5 to 7 calendar days after the start date. The shift is 7 calendar days when the start is a weekday, 6 from Saturday, and 5 from Sunday because the start date is not counted.
What date is 7 business days from today?
Seven business days from today is 9 to 11 calendar days later depending on the starting weekday: from a Monday it is the Wednesday of the following week, and from a Thursday it is the Monday two weeks out. Select Add, enter 7, and the calculator shows the exact date for today or any start date.
How long is 30 business days?
With Saturday and Sunday excluded and no holidays, 30 business days are 40 to 42 calendar days after the start date. The shift is exactly 42 calendar days when the start date is Monday through Friday.
How long is 45 business days?
With Saturday and Sunday excluded and no holidays, 45 business days are 61 to 63 calendar days after the start date. The shift is exactly 63 calendar days when the start date is Monday through Friday.
How do I count business days between two dates?
Select Count, enter the start and end dates as YYYY-MM-DD, choose whether each endpoint is included, and the result lists the working days together with the weekend and holiday dates that were skipped.
Is Saturday a business day?
Not under the default Saturday and Sunday weekend, but the setting is yours to change. Some organizations work six days and some regions rest on Friday and Saturday, so choose the weekend pattern that matches the calendar you are modeling.
Does the calculator include public holidays automatically?
No holiday calendar is selected automatically. You can load the U.S. Office of Personnel Management federal holiday schedule for the start year, including its standard Monday-to-Friday observed dates, or enter other governing holidays as YYYY-MM-DD values. Verify state, court, bank, market, employer, and one-off closures separately.
What if a holiday falls on a weekend?
That date is excluded once and is not double-counted. The U.S. federal preset supplies the standard observed weekday from the OPM schedule. For a manual calendar, enter an observed weekday as its own YYYY-MM-DD value.
Are the start and end dates included?
The selected endpoint options control whether an otherwise eligible start or end date counts. A weekend or listed holiday remains excluded even when its endpoint option is selected.
Can this result establish a filing or payment deadline?
No. Deadline rules may specify cutoff times, jurisdictions, emergency closures, observed holidays, service methods, and rollover behavior. Confirm the controlling rule and official calendar before relying on a date.