Working Hours Calculator Calculate total working hours from start/end times minus break duration.

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Working Hours Calculator

Calculate total working hours from start/end times minus break duration.

Enter Times

Set your start time and end time.

Add Break

Enter your break duration in minutes.

View Results

See total working hours, decimal hours, and optional earnings.

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What Is Working Hours Calculator?

The Working Hours Calculator determines your total working hours by computing the difference between clock-in and clock-out times, then subtracting break duration. It displays results in hours and minutes, decimal hours (for timesheet entry), total time before breaks, and break duration. An optional hourly rate field lets you estimate daily, weekly, and monthly earnings based on the calculated hours. The calculator handles overnight shifts (where the end time is earlier than the start time) by automatically adding 24 hours. This is essential for freelancers tracking billable hours, employees verifying timesheets, and managers overseeing work schedules.

Why Use Working Hours Calculator?

Simple start/end time calculation with break deduction
Shows both hours:minutes and decimal hours for timesheet compatibility
Optional earnings calculation with weekly/monthly projections
Handles overnight shifts automatically
Clean, distraction-free interface
No account needed — instant calculations

Common Use Cases

Freelance Billing

Calculate billable hours for client invoicing.

Timesheet Verification

Verify daily hours before submitting timesheets.

Shift Planning

Calculate effective working hours for different shift configurations.

Overtime Tracking

Determine if daily hours exceed overtime thresholds.

Earnings Estimation

Estimate daily and projected earnings based on hours worked.

Technical Guide

The calculator converts start and end times to minutes past midnight, computes the difference, and handles overnight shifts by adding 1440 minutes (24 hours) when the difference is negative. The break duration is subtracted from the total to get net working minutes. Decimal hours are computed as workMinutes / 60 rounded to 2 decimal places, matching the format used by most timesheet systems. The earnings projection uses workHours × hourlyRate for daily, daily × 5 for weekly, and daily × 5 × 4.33 for monthly (52 weeks / 12 months ≈ 4.33 weeks per month). All calculations use integer minute arithmetic to avoid floating-point precision issues.

Tips & Best Practices

1
The decimal hours format is what most timesheet systems require
2
For overnight shifts (e.g., 11 PM to 7 AM), the calculator automatically adds 24 hours
3
Enter 0 for break minutes if you didn't take a break
4
The monthly estimate uses 4.33 weeks per month (52/12) for accuracy
5
Use the Time Card Calculator for multi-day tracking with overtime

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Frequently Asked Questions

Q How are decimal hours calculated?

Decimal hours divide the total minutes by 60. So 7 hours 30 minutes = 7.50 decimal hours. This format is used by most payroll and timesheet systems.

Q Does it handle overnight shifts?

Yes, if the end time is before the start time (e.g., 10 PM to 6 AM), 24 hours are automatically added to get the correct duration.

Q How is the monthly estimate calculated?

Monthly earnings = daily earnings × 5 workdays × 4.33 weeks per month (52 weeks ÷ 12 months).

Q Can I enter multiple breaks?

Enter the total combined break time in minutes. For example, two 15-minute breaks = 30 minutes.

Q Is this tool accurate for payroll?

The calculations are mathematically accurate. However, always verify with your employer's timekeeping system, which may have different rounding rules.

About This Tool

Working Hours Calculator is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.