Timesheet calculator
Split the week's hours across projects, get per-project and per-day totals in decimal hours, and add rates for a billable figure. Free, no signup, and nothing leaves your browser.
| Project | Mon | Tue | Wed | Thu | Fri | Sat | Sun | Rate | Total |
|---|---|---|---|---|---|---|---|---|---|
| 20.00 | |||||||||
| 20.00 | |||||||||
| Daily total | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 | — | — | 40.00 |
How do you calculate a weekly timesheet?
Record hours per project per day in decimal form, add each row for a per-project total, add each column for a daily total, and add either one for the week. Multiplying a project total by its hourly rate gives the amount to invoice.
What is 15 minutes on a timesheet?
0.25. Timesheets use decimal hours rather than minutes, so quarter-hour increments are 0.25, 0.5 and 0.75. 15 minutes is 0.25, 30 minutes is 0.5, 45 minutes is 0.75, and 20 minutes is 0.33.
Should I round timesheet entries?
Most firms round to the nearest 6 or 15 minutes. Rounding to 15 is common in payroll and legal in the US as long as it is neutral over time rather than always in the employer’s favour. Rounding to 6 minutes, or a tenth of an hour, is the norm in legal and consulting billing.
Why do my timesheet totals never match the day I remember?
Because a timesheet filled in on Friday is a reconstruction, and reconstruction smooths the week. The blocks you remember are the ones with clean boundaries. Interruptions, context switches and the twenty minutes lost getting back into a task rarely make it onto the sheet, which is why recorded totals and remembered totals diverge in a consistent direction.
Quarter-hour reference
Timesheets are filled in decimal hours, which is why 15 minutes is 0.25 rather than 0.15. The full set of quarter and tenth-hour values:
| Time | Decimal | Time | Decimal |
|---|---|---|---|
| 6 minutes | 0.1 | 1 hr 15 | 1.25 |
| 15 minutes | 0.25 | 1 hr 30 | 1.5 |
| 20 minutes | 0.33 | 1 hr 45 | 1.75 |
| 30 minutes | 0.5 | 7 hr 30 | 7.5 |
| 45 minutes | 0.75 | 7 hr 45 | 7.75 |
| 50 minutes | 0.83 | 8 hr 15 | 8.25 |
The Friday afternoon problem
Almost nobody fills a timesheet in as they work. It gets done at the end of the week from calendar entries, commit history and memory, and each of those covers a different slice of what happened.
The result is not random noise. It is a systematically tidier week than the one you had, because the hours that are hardest to reconstruct are exactly the fragmented ones. A tool that records as you go produces a messier sheet, which is the point.
Or stop filling these in
A calculator can only add up what you remembered to write down, and what you write down a week later is smoother and more purposeful than the week was. Cronus records which app and window you were in and works out what the time was in service of, automatically. No timer to start, so the chaotic days produce a record instead of a gap.
$6 a month after a 21-day free trial. It never captures your screen.
Related: time card calculator, minutes to decimal converter, and time tracking for freelancers.