Work Hours Calculator

Choose the right calculator for daily shifts, weekly timesheets, break deductions, gross estimates, and time differences. Free, fast, and no signup required.

Enter Your Work Times

Your Results

7.50 hrs
Total Work Hours
Start Time9:00 AM
End Time5:00 PM
Total Duration8h 0m
Break30 min
Net Work Hours7h 30m
Regular Pay$150.00
Overtime Pay$0.00
Total Pay$150.00

What is a work hours calculator?

Interactive shift anatomy

Gross time becomes net time

9:00 AMBreak5:00 PM

8.0h gross− 0.5h break= 7.5h net

A work hours calculator is a free online tool that computes your total daily or weekly net work hours — the actual paid time after subtracting unpaid breaks from your gross shift length. Often called a clock in clock out calculator, shift hours calculator, or time card calculator, it replaces manual math with instant, accurate results for any schedule.

Enter your start time, end time, and break deduction to see total hours in decimal format (e.g., 7 h 30 min = 7.50). The calculator also estimates gross amounts when you enter a rate and optional threshold. For weekly totals, use the timesheet calculator; for simple rate conversion, check the hourly rate calculator.

🔒 Your data stays private. All calculations are performed entirely in your browser — we never collect, store, or transmit any of your information.

How Work Hours Are Calculated

The universal formula behind every calculator on this site

Live formula

Watch hours flow through the calculation

Gross8.5h−Break0.5h=Net hours8.0h

In This Section

Net Work Hours = End Time − Start Time − Unpaid Breaks

  1. Record your clock-in time (e.g., 9:00 AM)
  2. Record your clock-out time (e.g., 5:30 PM)
  3. Subtract start from end: 5:30 PM − 9:00 AM = 8.5 gross hours
  4. Subtract unpaid breaks: 8.5 − 0.5 (30-min lunch) = 8.0 net work hours

This four-step process applies whether you use a time card calculator, a digital timesheet app, or this free online tool. The same formula works for overnight shifts — if your end time is earlier than your start time, the calculator adds 24 hours automatically.

Converting to Decimal Hours

Decimal hours are useful for spreadsheets and timesheets. Divide remaining minutes by 60: 7 hours 45 minutes = 7.75 decimal hours. Use our time duration calculator to convert any time span instantly.

Weekly & Monthly Totals

Add each day's net hours together for a weekly total. Our timesheet calculator does this automatically across 5–7 days. For monthly estimates, multiply weekly hours by the number of working weeks (typically 4.33).

Extra-Hour Estimate

To create an extra-hour estimate, enter the threshold and multiplier you want to use. The calculator separates hours above that threshold and applies your selected multiplier.

Part-Time Calculators

Specialized tools for part-time workers, freelancers, and flexible schedules

Tap-to-plan schedule

Build a part-time week

Toggle working days and adjust the shift length.

Planned weekly time18 hours
🕐

Part-Time Hours Calculator

Calculate your part-time work hours with flexible start/end times. Perfect for irregular schedules and shift-based work.

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💵

Part-Time Salary Calculator

Estimate your part-time earnings based on hours worked and hourly rate. Includes weekly, monthly, and annual projections.

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📅

Part-Time Shift Planner

Plan and track your part-time shifts across multiple days. Visualize your weekly schedule and total hours at a glance.

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Part-Time Hourly Rate Calculator

Find an effective hourly rate from a part-time gross amount and expected hours.

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Part-Time Weekly Planner

Organize your part-time work week and track hours across multiple jobs.

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Part-Time Overtime Calculator

Model extra-hour estimates with your own threshold, rate, and multiplier.

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Latest From Blog

Helpful guides for better time tracking and calculator setup

Choose your learning path

Pick a topic, get a reading route

→→Start with “How to Calculate Work Hours” →
Work Hours Guide

How to Calculate Work Hours Accurately

Learn the simple formula for calculating work hours, break deductions, decimal hours, weekly totals, and gross estimates.

Read guide →Timesheet Guide

How to Convert Minutes to Decimal Hours

Learn how to convert minutes to decimal hours with practical examples and tools.

Read guide →Break Tracking

Break Deductions in Timesheets

See how break entries change total work hours in the calculator.

Read guide →Extra-Hour Guide

Estimate Extra-Hour Pay

Model extra-hour calculations with editable thresholds, multipliers, and examples.

Read guide →
View all articles →

Who Uses a Work Hours Calculator?

Common use cases for employees, freelancers, and businesses

Find your use case

How will you use your hours?

Clock in/out→Subtract breaks→Verify my pay
👩‍💼

Employees

Track daily shifts, review timesheets, and check gross totals. Calculate your hours before saving.

💻

Freelancers

Log billable hours, multiply them by your agreed rate, and invoice clients accurately.

📊

Payroll Teams

Review multi-employee timesheets and weekly totals. The timesheet calculator handles summaries instantly.

🏢

HR Managers

Compare schedules, total team hours, and prepare time records for review.

🔄

Shift Workers

Handle overnight and rotating shifts. Our calculator correctly handles times that cross midnight automatically.

🕐

Part‑Time Workers

Track irregular schedules across multiple jobs and compare weekly totals with your selected threshold.

Frequently Asked Questions

Quick answers to common questions

How do I calculate my work hours?
Subtract your start time from your end time, then subtract any unpaid break time — that gives you your net work hours. For example, clocking in at 9:00 AM and out at 5:00 PM with a 30‑minute unpaid lunch gives 8.0 − 0.5 = 7.5 net hours. Use our Work Hours Calculator to do this instantly, including overnight shifts and multiple break periods.
How many hours did I work this week?
Add up each day’s net work hours after breaks to get your weekly total. Our Timesheet Calculator lets you enter daily start and end times for up to 7 days and produces the weekly total automatically.
How is extra-hour pay estimated?
The estimate equals hours above your selected threshold multiplied by your rate and chosen multiplier. The calculator lets you edit the threshold, multiplier, and rate used for the estimate.
How do I calculate my gross hourly amount?
Multiply your total net hours worked by your hourly rate. For example, 37.5 hours x $20/hr = $750 gross. The calculator above estimates this from a single shift. For other periods, total the relevant hours first. To find your hourly rate from a gross amount, use our Hourly Rate Calculator.
How do I convert minutes to decimal hours?
Divide the minutes by 60 and add to the whole hours. For example, 7 hours 45 minutes = 7 + (45 / 60) = 7.75 decimal hours. Common conversions: 15 min = 0.25, 30 min = 0.50, 45 min = 0.75. Use our Time Duration Calculator for instant conversion.
How do lunch breaks affect my work hours?
Breaks you enter are subtracted from the total shift. If you work 9 AM to 5 PM and enter a 1‑hour break, the result is 7 net hours.
Why are there separate country calculators?
Country pages provide familiar currency and language labels. The calculation itself uses the start time, end time, break, rate, threshold, and multiplier you enter.
Can I calculate pay for overnight shifts?
Yes. If your end time is earlier than your start time, our calculator assumes the shift crosses midnight and calculates accordingly — a 10 PM to 6 AM shift is correctly computed as 8 hours. This works on every calculator tool including the Work Hours Calculator, Timesheet Calculator, and Bi-Weekly Calculator.
How do I calculate monthly work hours?
Multiply your weekly hours by the average weeks per month (4.33). A 40‑hour work week = approximately 173.3 hours per month. For salaried employees, annual hours are typically 2,080 (40 × 52), which divides to about 173.3 per month. Use our calculator for exact daily figures, then multiply by your working days per month.
What is the difference between gross and net work hours?
Gross hours = total time from clock-in to clock-out, including all breaks. Net hours = gross hours minus the break minutes you enter. For example, clocking in at 8 AM and out at 5 PM gives 9 gross hours; subtract a 1-hour break and you have 8 net hours.
Are these calculators free to use?
Yes! All our calculators are 100% free, require no signup, and work entirely in your browser. Your data stays on your device — we never collect or store any information. Bookmark any calculator page for quick access anytime.
Do these calculators work on mobile?
Absolutely. All calculators are fully responsive and work on phones, tablets, and desktops with any modern browser. The interface adapts to your screen size for easy input on touchscreens. Bookmark the page for quick access anytime.
How many hours is 9 to 5?
A 9 AM to 5 PM shift is 8 gross hours. After subtracting a 30-minute break, you have 7.5 net work hours (or 7.5 decimal hours). After a 1-hour break, net hours drop to 7.0. Use our Work Hours Calculator to check any shift with custom break times.