Work Hours Calculator

First, use the Work Hours Calculator to get the number of days between your start and end dates. For example, from March 1, 2024 to March 15, 2024, the calculator returns 14 days. Next, identify how many of those days are workdays. If the period runs Monday, March 4 to Friday, March 15, 2024, that is 10 workdays. Then multiply workdays by your daily hours. At 8 hours per day, 10 workdays equals 80 work hours. If you work 7.5 hours per day, 10 workdays equals 75 work hours. If your schedule includes weekends, such as a 5-day workweek with Saturday shifts, count those days too. For a mixed schedule, list each workday and its hours, then add them. The key is to separate calendar days from workdays before multiplying. If you need to convert hours back to days, divide total hours by your daily hours. For example, 96 hours divided by 8 equals 12 workdays. For quick date math, pair this with our date-difference-calculator to verify your day count.

Yes, the Work Hours Calculator returns total calendar days, which includes weekends and holidays. For example, from Monday, April 1, 2024 to Sunday, April 14, 2024, it returns 14 days. That 14-day span includes 10 weekdays and 4 weekend days. If you only work Monday through Friday, you would count 10 workdays, not 14. Holidays are also included in the day count unless you subtract them manually. Suppose your 14-day period includes Memorial Day on Monday, May 27, 2024. If you do not work that holiday, subtract 1 workday, leaving 9 workdays. At 8 hours per day, that is 72 hours instead of 80. To get an accurate work-hours total, start with the calculator's day count, subtract non-working weekend days and holidays, then multiply by daily hours. If your pay period crosses a month boundary, check your employer's holiday schedule. For a full date span including business-day logic, use our date-calculator alongside this one.

A biweekly pay period covers 14 calendar days. For a standard Monday-through-Friday schedule, that is 10 workdays. At 8 hours per day, 10 workdays equals 80 work hours per biweekly period. If you work 7.5 hours per day, it is 75 hours. If you work 10 hours per day, it is 100 hours, which would include 20 hours of overtime across the two workweeks (assuming a 40-hour weekly threshold). Over a year, there are 26 biweekly periods, so 80 hours times 26 equals 2,080 work hours, the standard full-time annual figure. If your biweekly period includes a paid holiday, your hours may still be 80 because holiday pay often counts toward the total. If the holiday is unpaid, your worked hours drop to 72 for that period. To check a specific period, enter the start and end dates in the Work Hours Calculator, confirm the day count is 14, then apply your daily hours. For annual totals, multiply your biweekly hours by 26.

Use the same day count from the calculator, but multiply by your part-time daily hours. Suppose the calculator returns 21 days for a three-week period from June 3 to June 23, 2024. If you work 4 hours per day, 5 days per week, that is 15 workdays times 4 hours, equaling 60 work hours. If you work 6 hours per day, 15 workdays times 6 equals 90 hours. If you work only 3 days per week at 8 hours per day, a 21-day period has 9 workdays, so 9 times 8 equals 72 hours. The trap is multiplying calendar days by daily hours. For example, 21 days times 4 hours equals 84, which overstates your hours because it counts weekends. Always count actual workdays first. If your schedule varies, list each day's hours and sum them. For part-time employees, overtime rules still apply in many US states after 40 hours per workweek, though some states use a daily threshold like 8 hours. Track weekly totals separately if you are near 40 hours. Use our date-difference-calculator to confirm the exact day span.

Calendar days are every day in the range, including weekends and holidays. Workdays are the days you are actually scheduled to work, usually Monday through Friday. The Work Hours Calculator returns calendar days. For example, from July 1, 2024 to July 31, 2024, it returns 30 calendar days. In that month, there are 22 workdays (Monday through Friday) and 8 weekend days, assuming no holidays. If you multiply 30 days by 8 hours, you get 240 hours, which is wrong for a standard schedule. The correct calculation is 22 workdays times 8 hours, equaling 176 work hours. The 64-hour difference comes from counting weekends as workdays. To avoid this, subtract weekend days from the calendar day count. If a holiday falls on a weekday, subtract 1 more workday. For July 2024, if July 4 (Thursday) is a holiday, workdays drop to 21, and hours drop to 168. This distinction matters for payroll, invoicing, and project estimates. For more date-based math, try our age-calculator or date-calculator.

Yes. Freelancers and project managers use the day count to estimate delivery dates and billable hours. Suppose a project requires 120 work hours and you work 6 hours per day. Divide 120 by 6 to get 20 workdays. If you work Monday through Friday, 20 workdays equals 4 weeks, or 28 calendar days including weekends. If you start on September 2, 2024, the Work Hours Calculator shows September 2 to September 30, 2024 is 28 days, so your deadline is around September 30. If you work 8 hours per day, 120 divided by 8 equals 15 workdays, or 3 weeks, finishing around September 20. For billing, if your rate is $75 per hour and you log 120 hours, the invoice total is $9,000. If you bill by the day at $600 per day, 15 days equals $9,000 as well. Always add buffer for scope changes; a 10% buffer on 120 hours adds 12 hours, or 1.5 extra workdays at 8 hours per day. For related financial estimates, see our mortgage-calculator.