TimesheetCalculator
Keep track of time spent across several projects in one simple Timesheet Calculator. Name each row, set its start and end times, and every line gets its own hours plus a grand total for the whole sheet — project names included.
Project Timesheet
One row per project or task — set the start and end times and the hours follow.
How the Timesheet Calculator Works
Project hours tracked in four easy steps.
Name Your Projects
Type a project or task name on each row so the totals are easy to read back later.
Enter Start & End
Set the start time and end time for each entry. 24-hour times work, and so do overnight shifts.
Add More Rows
Press "+ Add Row" for every extra project or task — the sheet grows with your period.
Review Grand Total
Every row shows its own individual duration, and the grand total below adds them up in HH:MM and decimal hours.
What Is a Timesheet Calculator?
What project-based time tracking is and why it helps.
Project-level time tracking
A Timesheet Calculator puts the hours you spend on several projects or tasks into one view. A plain time difference tool handles one gap; a timesheet keeps many labelled entries, times each one and adds them into a grand total.
It works like a paper timesheet with the sums done for you — automatic calculations instead of mental arithmetic and conversion slips.
Per-row and aggregate calculations
Each row measures the time between its own start and end, using base-60 arithmetic: 9:00 to 12:30 is 3 hours 30 minutes, not 3.30. The grand total then adds every row, carrying spare minutes into hours.
Decimal hours for payroll
Payroll usually wants decimal hours, so the total is converted for you: 7h 30m is 7.50. That avoids the classic slip of typing 7.30 when you mean seven and a half hours.
When to Use a Timesheet Calculator
Where project-based time tracking earns its keep.
Freelance & Consulting
Keep billable hours for several clients on one sheet — one row per client or project — and invoice from the grand total.
Team Management
Gather team members' daily time entries, see how hours split across projects and check the total against the planned workload.
Project Budgeting
Compare estimated vs. actual hours. If design was budgeted at 20 hours and the timesheet shows 28, you can see exactly where scope crept.
Academic Research
Record lab hours, research and writing time. Many grants ask for time logs in research funding reports.
Maintenance & Field Work
Log service call durations across job sites, one call per row, to guide scheduling and billing.
Legal Time Tracking
Track billable hours per client matter; the decimal output suits legal billing in 6-minute increments (0.1 hour).
Timesheet Calculator FAQ
Common questions about the Timesheet Calculator, answered.
There is no limit. Every row is a separate project or task with its own start time, end time and duration — press "+ Add Row" whenever you need another line.
Yes. When a row's end time is earlier than its start time, the entry is treated as crossing midnight, so 10:00 PM to 6:00 AM counts as 8 hours.
There is no file export, because everything runs inside your browser. Use the Copy button on the summary to grab the totals, or print the page (Ctrl+P or Cmd+P) and save it as a PDF.
Each row's duration is the gap between its start and end time, and the grand total adds every row together. It is shown both in HH:MM and in decimal hours.
Yes — add a row per day, or per task, and the grand total covers the whole week. If you also need break deductions and overtime, the Time Card Calculator is built for that.
No. The calculations happen on your device and nothing is uploaded. Refreshing or closing the tab clears the rows, so note or copy your totals before you leave.
Divide the minutes by 60 and round to one decimal place. In 6-minute billing, 1–6 minutes is 0.1 hour, 7–12 minutes is 0.2, and so on, so 25 minutes bills as 0.4 and 45 minutes as 0.8.