Time duration
Time Duration Calculator
Calculate hours, minutes, decimal time, and break-adjusted totals between two times or two dates with the same refined tool layout as Pomodoro.
Interactive time duration
Break deduction
Subtract lunch or unpaid break time from the total automatically.
Net working time
Add a break if needed
Quick presets
Live result dashboard
Instant output for payroll, planning, and billing
8.50 decimal hours
8 hours and 30 minutes
Built for real-world time calculations
Timesheets & payroll
Calculate work hours and deduct break time for payroll-ready totals.
Overnight shifts
Handle late-night schedules like 10 PM to 6 AM without manual math.
Project planning
Measure elapsed time between milestones, deadlines, and delivery windows.
Freelance billing
Use decimal hours for invoices, retainers, and billable-hour reporting.
Continue with other calculators
Explore the rest of the date and time toolset with the same clean workflow.
Everything you need in a time duration
Work Hours & Payroll
Quickly total hours worked and subtract break times to get a clean duration for payroll and timesheets.
Overnight Shifts
If end time is earlier than start time, it calculates as an overnight span correctly without errors.
Date to Date Mode
Measure long elapsed durations between specific calendar dates and times for tracking projects.
Decimal Hours
Get precise decimal readouts (like 8.25 hours) ready for immediate insertion into billing/invoice software.
Break Deduction
Enter your unpaid break duration and the calculator immediately provides net working hours.
How to use the time duration
Select mode
Choose between 'Time to Time' for daily shifts, or 'Date to Date' for longer spans.
Enter boundaries
Input your start and end times (and dates if applicable).
Subtract breaks
Optional: type in any unpaid lunch or break minutes.
Who uses this time duration?
Timesheets
Calculate exact daily shift durations for logging work hours.
Freelancing
Find exact billable decimal hours for invoicing clients.
Project Mgmt
Track exact elapsed turnaround times for specific project tasks.
Why use ClockUnit instead of an app?
Tracking elapsed time accurately is harder than it looks, especially when spans cross over midnight or cover multiple days. ClockUnit's duration calculator handles all the time-math so you don't have to.
Whether you're tracking work hours, measuring a sleep cycle, or timing a project phase, our tool provides an instant, accurate breakdown in total hours, minutes, and seconds.