Time Duration Calculator – Work Hours & Time Math
Calculate time between hours, add/subtract time, convert units (seconds/minutes/hours/days), and track weekly work hours. Perfect for timesheets, billing, payroll with decimal hours format and break time deduction.
Advertisement
Ad blocked by browser
Calculate Time Between
Examples of Real-World Usage
Discover how professionals use this tool to solve real problems and boost productivity.
Freelance Time Tracking
Track billable hours for client projects. Calculate time spent with break deductions, get decimal hours for invoicing, and maintain accurate time logs.
Employee Timesheets
Create accurate timesheets for payroll. Enter clock-in/out times, subtract lunch breaks, get decimal hours that match payroll system formats.
Project Time Management
Track time spent on tasks and projects. Calculate meeting durations, development time, and total project hours for better planning and estimation.
Shift Work Planning
Calculate shift durations for rotating schedules. Handle overnight shifts, multiple breaks, and get accurate work hours for different shift patterns.
School Schedule Planning
Calculate class durations, study time, and total school hours. Plan homework time and track time spent on different subjects.
Workout Time Tracking
Track workout durations, rest periods between sets, and total exercise time. Convert between formats for fitness apps and training logs.
Meeting Duration Analysis
Calculate meeting lengths, track time spent in discussions, and analyze if meetings are efficient. Copy durations to meeting notes.
Travel Time Calculation
Calculate travel times, commute durations, and journey lengths. Add or subtract time for connections, delays, and layovers.
Cooking & Baking Timers
Calculate total cooking time, add prep time to cook time, convert recipe times between units, and plan meal preparation schedules.
Event Planning
Calculate event durations, schedule breaks and segments, plan timings for conferences, weddings, and presentations with accurate time math.
Complete Time Calculation Suite
Everything you need for time calculations: duration between times, add/subtract operations, unit conversions, and weekly work hours tracking. Includes decimal hours format perfect for payroll and billing.
Time Between Calculator
Calculate exact duration between start and end times. Perfect for tracking work hours, meeting lengths, and time spent on tasks. Includes break time deduction.
Add/Subtract Time
Add or subtract hours, minutes, and seconds from any time. Calculate future or past times for scheduling and planning.
Time Unit Converter
Convert between seconds, minutes, hours, and days. Real-time conversion with high precision up to 6 decimal places.
Weekly Work Hours Tracker
Track work hours for each day of the week with customizable start/end times and break periods. Calculate total weekly hours automatically.
Decimal Hours Format
View time in decimal format (e.g., 7.5 hours) - perfect for payroll, billing, and timesheet submissions.
Break Time Deduction
Automatically subtract lunch breaks and rest periods from total work time. Get accurate billable or payable hours.
Multiple Time Formats
Results shown in hours-minutes-seconds format, decimal hours, total minutes, and total seconds. Choose what you need.
Copy to Clipboard
One-click copy of any calculation result. Easy sharing in timesheets, reports, emails, and documents.
Real-Time Calculations
Unit conversions update instantly as you type. No need to click calculate buttons for conversions.
Overnight Shifts Support
Automatically handles time calculations that span across midnight. Perfect for night shift workers.
Average Hours Per Day
In weekly tracker, see average work hours per day. Helps maintain work-life balance and track workload.
No Installation Required
100% browser-based, no downloads or sign-up needed. All calculations happen locally for instant results.
How to Use the Time Duration Calculator – Work Hours & Time Math
Follow these easy steps to get started with Time Duration Calculator – Work Hours & Time Math and achieve your goals quickly.
Select Calculator Type - Choose from four tabs: Time Between (duration calculator), Add/Subtract (time math), Convert Units (unit conversion), or Weekly Hours (work tracker).
Enter Your Times - Click on time inputs to select hours and minutes using the time picker, or type times directly in HH:MM format.
Add Break Time (Optional) - For Time Between calculator, enter break time in minutes to subtract from total duration. Common for lunch or rest breaks.
View Multiple Formats - Results display in hours/minutes/seconds, decimal hours, total minutes, and total seconds. Use whichever format you need.
Copy Results - Click 'Copy' button on any result card to copy the duration or time to your clipboard for easy sharing.
Use Unit Converter - Switch to Convert Units tab to convert between seconds, minutes, hours, and days. Results update in real-time as you type.
Track Weekly Hours - In Weekly Hours tab, check/uncheck days, set start/end times, add break minutes for each day. Total updates automatically.
Add or Subtract Time - Use Add/Subtract tab to calculate what time it will be after adding hours/minutes, or what time it was before subtracting.
Frequently Asked Questions
Find answers to commonly asked questions about our tools and services.
Still have questions?
Can't find what you're looking for? We're here to help you get the answers you need.