Working Hours Calculator

Last reviewed: October 14, 2026

Add up the total working hours over any date range with full control over daily start and end times, lunch break, workdays of the week, and which country's holidays should be excluded. The result includes a week-by-week table so you can verify your numbers against a timesheet or invoice.

Use it to bill time, estimate the effort in a project plan, size a leave entitlement or document the hours behind a report. For pure day counts (no hours), use the business days between dates calculator.

Start date

End date

Start time

End time

Lunch break (minutes)

Holiday Calendar

Workdays

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Worked example: a contractor billing June 2026

A contractor bills 9:00 to 18:00 with a 60-minute lunch, 8 hours a day, Monday to Friday, from 1 June to 30 June 2026, with the United States selected. June 2026 has 22 weekdays, and the calculator excludes the federal holiday on one of them: Juneteenth (Friday, June 19). It returns 21 workdays × 8 hours = 168 hours, which at $200 an hour is $33,600.

Worked example: a quarter's scheduled hours

An employee scheduled 9:00 to 17:00 with a 30-minute lunch, 7.5 hours a day, Monday to Friday, needs the hours for the first quarter of 2026, 1 January to 31 March, with the United States selected. The quarter has 64 weekdays, and 3 of them are federal holidays: New Year's Day (Thursday, January 1); Martin Luther King Jr. Day (Monday, January 19); Presidents' Day (Monday, February 16). The calculator returns 61 workdays × 7.5 hours = 457.5 hours.

Different work-week conventions

Picking a country sets the workday buttons to the working week the site uses for it: Monday to Friday for 21 of the 25 countries, Sunday to Thursday for Saudi Arabia, Qatar and Egypt, and Sunday to Friday for Israel, where the site counts the operating days of ZAHAV, the Bank of Israel's payment system, and so treats Saturday as the only weekly rest day. A Saudi royal order of 23 June 2013 set the official working days of ministries, government bodies and financial institutions at Sunday to Thursday, with Friday and Saturday as the weekly holiday; Qatar's Emiri Decision No. 57 of 2025 sets the working days in the State at Sunday to Thursday; and Egypt's Circular No. 1 of 2006 unified the weekly holiday of the State's administrative units on Friday and Saturday. The UAE's federal government works Monday to Friday, closing at 12:00 on Fridays, with Saturday and Sunday as its weekend since 1 January 2022. The buttons accept any other pattern your contract or rota sets, and once you change one by hand, picking another country leaves your choice alone. A copied address carries the workdays and counts as a choice made by hand: after opening one, a change of country changes the holidays and leaves the buttons as they are.

Half-day holidays and observed days

The calculator treats every holiday in the selected country's data as a full day off; the data has no half-day entries, so if you work part of a listed holiday, add those hours back by hand. A holiday that falls on a day you have not marked as a workday is skipped once, as a non-working day, so it is never counted twice. Where a country's data lists an observed weekday, that weekday is skipped like any other holiday: the US federal calendar, for example, takes the Friday off when a holiday falls on a Saturday and the Monday when it falls on a Sunday.

For informational purposes only

This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.

Frequently Asked Questions

How does the calculator handle holidays?

Each holiday in the selected country's data that falls on a day you marked as a workday removes that day's hours from the total, and the result lists every holiday it excluded. A holiday on a day you do not work is counted once, as a non-working day. If you take only some of the listed holidays, choose "No holidays (weekends only)" as the country and subtract the days you take off by hand. The data has no half-day entries.

Can I model a 4-day work week or a Sun-Thu schedule?

Yes. The Workdays buttons take any combination of days, so a Monday-to-Thursday week is the Friday button switched off. Choosing Saudi Arabia, Qatar or Egypt as the country switches the workdays to Sunday to Thursday, the week the site uses for those countries. Choosing Israel sets Sunday to Friday, the week of the Bank of Israel's payment system; for a Sunday-to-Thursday week there, switch the Friday button off. The hours per day come from your start, end and lunch inputs and apply to every day you mark as a workday.

What happens if my end time is before my start time (e.g. an overnight shift)?

The calculator does not wrap past midnight: a day whose end time is before its start time counts zero hours. For a shift that crosses midnight, mark the days on which the shift starts as workdays, read the workday count from the result and multiply it by the shift length (8 hours for 22:00 to 06:00 with no break).

Does it account for daylight saving time?

Hours per day are the difference between the clock times you enter, less the lunch break, so a 9:00 to 17:00 day with no break is 8 hours on every date, including the days the clocks change. If a shift actually spans a clock change, the time worked that day differs from what the calculator shows by the length of the change; adjust that day by hand.

Can I export the weekly breakdown?

There is no export button. The weekly table can be selected and copied from the page; it shows the first 26 weeks that contain a workday, while the totals above it always cover the whole range. Once you change an input, the page address holds every input, so copying the URL then keeps the calculation; an address without them opens on today and the 30 days after it. For a week-by-week list longer than 26 weeks you can run the range in parts.

Sources for these rules

Royal Order: Weekly Holiday on Friday and Saturday (23 June 2013) (Saudi Press Agency)
Emiri Decision No. 57 of 2025 on working days and official holidays (Al Meezan, the Qatari Legal Portal)
Circular No. 1 of 2006 unifying the weekly holiday on Friday and Saturday (archived copy) (Egyptian Government Portal)
Business days of the ZAHAV RTGS system, 2026: operating days Sunday through Friday; the banking business day ends at 18:30, and at 14:00 on Fridays and holiday eves (Bank of Israel)
Working hours in the public sector (UAE Government Portal)
Federal Holidays: a Saturday holiday is observed on the preceding Friday (5 U.S.C. 6103(b)), a Sunday holiday on the following Monday (E.O. 11582, section 3(a)) (U.S. Office of Personnel Management)

Checked October 11, 2026. All sources