Timesheet Hours Calculator
The Timesheet Hours Calculator computes timesheet hours from the relation total hours = (clock out - clock in - break minutes / 60) x days worked. It takes 4 inputs (clock in time in decimal hours in h, clock out time in decimal hours in h, unpaid break per day in min, days worked in days) and returns the timesheet hours. Because this is a pure mathematical or physical formula rather than a jurisdiction-specific rule, the result never changes over time: the same inputs always produce the same answer, so you can rely on it whether you are checking homework, sizing a design, or sanity-checking another tool. Enter your values in the fields below and the result updates instantly; you can also share a permalink that pre-fills the exact calculation, which is useful for teaching, reports, or collaboration. For example, with clock in time in decimal hours = 8 h, clock out time in decimal hours = 16 h, unpaid break per day = 60 min, days worked = 5 days, the timesheet hours works out to 35, and the worked example further down the page shows every step so you can follow the arithmetic and reproduce it by hand. The method is the standard form documented by US OPM Federal Holidays and Leave, and the figure above each result carries the date it was last verified. This tool is general information and is not a substitute for professional engineering, medical, financial, or scientific advice; always check critical results against the primary source and your own judgement.
With Clock in time in decimal hours = 8 h, Clock out time in decimal hours = 16 h, Unpaid break per day = 60 min, Days worked = 5 days, the result is 35.
Applies to: any numeric inputs. Method source: US OPM Federal Holidays and Leave, checked 2026-06-23.
The formula
total hours = (clock out - clock in - break minutes / 60) x days worked
Worked example
With Clock in time in decimal hours = 8 h, Clock out time in decimal hours = 16 h, Unpaid break per day = 60 min, Days worked = 5 days:
- daily worked hours = (16 - 8) - 60 / 60 = 7.0000
- total = daily x days = 7.0000 x 5 = 35.0000
- Timesheet Hours = 35
This worked example is one of the automated golden-value tests this calculator must pass before it can publish.
What this assumes
- Inputs are real numbers in the units shown.
- The result is the exact value of total hours = (clock out - clock in - break minutes / 60) x days worked; general information, not professional advice.
Frequently asked questions
What formula does this use?
total hours = (clock out - clock in - break minutes / 60) x days worked, the standard form documented by US OPM Federal Holidays and Leave.
Does the result ever change over time?
No. This is a pure formula with no external rate, so the same inputs always give the same result.
Official sources and verification
- Method: US OPM Federal Holidays and Leave, checked 2026-06-23.
Reviewed by the CalculatorHub team, edited by James Graham, 2026-06-23. See our methodology. General information, not professional advice.