Work Hours Calculator
Calculate your daily and weekly work hours instantly. Handles breaks, overnight shifts, and converts to decimal hours for timesheets and payroll.
Enter your work hours for each day
How it works
Enter start time, end time, and break for each day you worked. Your total hours will calculate automatically.
Overtime
Track hours beyond your standard week
Break Handling
Breaks count as paid work time
Week Settings
Time Rounding
Many employers round time entries. Check your company policy.
Enter Your Weekly Hours
Fill in your start time, end time, and break duration for at least one day to see your calculated hours.
Whether you're clocking in for a shift or totalling your weekly hours, this free time card calculator makes it easy. Enter your times, subtract breaks, and get accurate results in both regular and decimal format - perfect for timesheets, payroll, and invoicing.
Tracking work hours shouldn't require mental gymnastics. Start time, end time, minus breaks - that's the formula. But when you're dealing with overnight shifts, different break lengths, and converting to decimal hours for payroll, things get complicated fast. This free timecard calculator handles all of it so you can focus on the work itself, not the math around it.
What This Time Card Calculator Does
Everything you need for accurate time tracking
This isn't just a simple time difference calculator. It's a complete time card calculator built for real work situations - overnight shifts, multiple breaks, weekly timesheet totals, military time (24-hour format), and automatic conversion to decimal hours for invoicing and payroll systems.
- Daily HoursCalculate net working time for any single day, including overnight shifts that cross midnight.
- Weekly TotalsAdd up your entire week's hours with per-day breakdown and daily averages.
- Break DeductionSubtract lunch breaks and rest periods automatically to get accurate net working time.
- Decimal ConversionSee hours in both HH:MM and decimal format - ready for any timesheet or invoice.
How to Use This Calculator
Get your results in seconds
- 1
Choose Daily or Weekly Mode
Use Daily for single shifts. Use Weekly to track your full work week and get totals.
- 2
Enter Your Start Time
When did your shift begin? Use the time picker or type directly. For example: 09:00 or 22:00 for a night shift.
- 3
Enter Your End Time
When did you finish? If your shift ends after midnight, enable 'Overnight Shift' to calculate correctly.
- 4
Add Break Duration
How long was your total unpaid break? Select a preset or enter minutes directly. Don't forget coffee breaks that add up!
- 5
View Your Results
Net working time appears instantly in hours:minutes and decimal hours. Copy results directly to your timesheet.
How Work Hours Are Calculated
The math behind your timesheet
Example: You start at 9:00 AM and finish at 5:30 PM with a 30-minute lunch. That's 8 hours 30 minutes total, minus 30 minutes break = 8 hours net working time. In decimal: 8.0 hours. Simple, but easy to mess up when you're doing it in your head at the end of a long day.
Overnight Example: Start at 10:00 PM, end at 6:30 AM next day, with a 30-minute break. Total shift = 8 hours 30 minutes (crossing midnight), minus 30-minute break = 8 hours net. The calculator handles the date change automatically when overnight mode is enabled.
Converting to Decimal Hours - Quick Reference
Why payroll and invoicing love decimal format
Decimal hours make multiplication easy. Instead of calculating 7 hours 45 minutes × $30/hour (which requires converting to minutes first), you just do 7.75 × 30 = $232.50. That's why most payroll systems, invoicing software, and timesheets use decimal format. Use this minutes-to-decimal conversion table as a quick reference when filling out your timecard.
Minutes | Decimal Hours | Hours : Minutes | How to Convert |
|---|---|---|---|
| 5 min | 0.08 | 0:05 | 5 ÷ 60 = 0.08 |
| 10 min | 0.17 | 0:10 | 10 ÷ 60 = 0.17 |
| 15 min | 0.25 | 0:15 | 15 ÷ 60 = 0.25 |
| 20 min | 0.33 | 0:20 | 20 ÷ 60 = 0.33 |
| 30 min | 0.50 | 0:30 | 30 ÷ 60 = 0.50 |
| 45 min | 0.75 | 0:45 | 45 ÷ 60 = 0.75 |
| 1 hour | 1.00 | 1:00 | 60 ÷ 60 = 1.00 |
| 4h 30m | 4.50 | 4:30 | 30 ÷ 60 = 0.50, add to 4 |
| 7h 45m | 7.75 | 7:45 | 45 ÷ 60 = 0.75, add to 7 |
| 8h 20m | 8.33 | 8:20 | 20 ÷ 60 = 0.33, add to 8 |
This time card calculator automatically converts all your hours to decimal format, so you don't need to do the math manually. Just enter your times and copy the decimal result directly to your timesheet or invoice.
Common Mistakes When Calculating Hours
Don't let these trip you up
- Forgetting to Subtract BreaksIf your lunch is unpaid, it doesn't count as work time. An 8-hour shift with an hour lunch is really 7 work hours.
- Getting Overnight Shifts WrongIf you end after midnight, the calculator needs to know. Otherwise it looks like you worked negative hours.
- Rounding Too EarlyCalculate exact time first, then apply your employer's rounding rules. Rounding each day before totalling causes drift.
- Mixing Time FormatsStick to either 12-hour or 24-hour format. 9:00 AM is 09:00, but 9:00 PM is 21:00. Mixing them creates errors.
- Ignoring Small BreaksTwo 15-minute breaks add up to 30 minutes. Over a week, that's 2.5 hours. Include all unpaid break time.
- Manual Math ErrorsAdding 3 hours 45 minutes + 4 hours 30 minutes isn't 7:75. It's 8:15. Use a calculator to avoid these mistakes.
Tips for Faster Timecard Completion
Work smarter, not harder on admin
Tracking time is tedious, but it directly affects your pay. Here are some ways to make filling out your timecard less painful:
- Record Times DailyDon't wait until Friday. Log your hours at the end of each day while it's fresh in your memory.
- Use the Copy FunctionIf you work similar hours each day, use 'Copy to All Days' to fill your week instantly in this time card calculator.
- Know Your Break RulesFigure out which breaks are paid vs unpaid once, then apply the same logic every time you fill out your timecard.
- Keep Decimal Hours HandyMost payroll and invoicing software accepts decimal hours directly - no conversion needed. This calculator shows both formats.
- Save Your TimecardPrint to PDF or screenshot your completed timecard each week for your personal records before submitting to your employer.
How to Print Your Timecard or Save as PDF
Create a permanent record of your calculated hours
Many employers require a printed or PDF copy of your timesheet. This time card calculator includes a built-in 'Save PDF' button that makes exporting your hours quick and easy. Here's how to use it:
- Quick Export Method (Recommended)Click the "Save PDF" button in the top-right corner of your Weekly Summary results. This instantly generates and downloads a professional PDF timesheet with only your work hours data - no calculator interface or extra page elements. The PDF is automatically saved to your device with the filename "timesheet-[date].pdf".
- What Gets ExportedYour exported timesheet includes: total hours worked, daily breakdown with start/end times, break durations, decimal hours, overtime calculations (if enabled), and all summary statistics. The document is professionally formatted and ready to submit to your employer or save for your records.
- File Format & CompatibilityThe calculator generates a PDF file named "timesheet-[date].pdf" (for example, "timesheet-2026-01-29.pdf") that downloads directly to your device. The PDF is universally compatible and can be opened on any device with a PDF reader - computers, phones, tablets, or printed directly. No additional software or conversion needed.
Alternative Method: Manual Browser Print
If you prefer to print the entire page including the calculator interface, you can use your browser's standard print function:
- 1
Enter All Your Work Hours
Fill in your start times, end times, and breaks for all days worked. Make sure your weekly total is displayed in the results panel.
- 2
Open Your Browser Print Dialog
Press Ctrl+P (Windows) or Cmd+P (Mac), or click the three-dot menu in your browser and select "Print".
- 3
Choose "Save as PDF"
In the print dialog, change the destination from your physical printer to "Save as PDF" or "Microsoft Print to PDF".
- 4
Adjust Print Settings
Select Portrait orientation. Enable "Background graphics" to capture the full calculator layout with colors and styling.
- 5
Save Your Timecard
Click "Save" and choose a location. Name your file with the date range (e.g., "Timecard_Jan_20-26_2026.pdf") for easy reference.
Pro tip: The 'Save PDF' button is the fastest way to export just your timesheet data. For a quick backup, you can also take a screenshot: On Windows, press Windows+Shift+S to capture the results panel. On Mac, press Cmd+Shift+4 and drag to select the area. This gives you a quick image file you can attach to emails or save for your records.
From Hours Worked to Invoice Sent
The last step is getting paid
Calculating your hours is only half the job. If you're a freelancer or contractor, those hours need to become an invoice. And that invoice needs to look professional, be accurate, and go out quickly - before clients forget about the work you did. Invoice Mama turns your tracked hours into polished invoices in seconds. Just enter your time and rate, and you're ready to send.
- Instant InvoicesOur AI creates professional invoices in 10 seconds. Describe the work, we handle the formatting.
- Hourly Billing Built InEnter hours and hourly rate - the math happens automatically. No spreadsheet required.
- Track EverythingSee which invoices are paid, pending, or overdue. Stop wondering who owes you money.
Working Hours Calculator for Every Situation
From simple shifts to complex schedules
A good Working Hours Calculator needs to handle more than just 9-to-5 jobs. Real work schedules are messy - split shifts, variable breaks, overnight work, and different hours each day. This Working Hours Calculator was built with that reality in mind.
- Standard Day ShiftsThe most common use for a Working Hours Calculator. Enter start time, end time, subtract your lunch break, and get accurate net hours.
- Night and Overnight ShiftsShifts that cross midnight confuse simple calculators. This Working Hours Calculator handles overnight work correctly every time.
- Variable SchedulesDifferent hours each day? The weekly view in this Working Hours Calculator tracks everything and gives you accurate totals.
- Multiple Break PeriodsAdd up all your unpaid breaks and the Working Hours Calculator subtracts them from your total automatically.
Benefits of an Online Working Hours Calculator
Why digital beats manual every time
You could calculate your hours with pen and paper, but an online Working Hours Calculator offers significant advantages. It's faster, more accurate, and available whenever you need it.
Feature | Manual Calculation | Working Hours Calculator |
|---|---|---|
| Speed | Several minutes | Instant results |
| Accuracy | Prone to errors | 100% accurate math |
| Overnight shifts | Confusing to calculate | Handled automatically |
| Decimal conversion | Requires extra steps | Shown automatically |
| Weekly totals | Tedious addition | Calculated instantly |
| Availability | Need paper/spreadsheet | Always accessible online |
An online Working Hours Calculator like this one saves time and eliminates errors. Use it every time you need to track hours - for timesheets, invoices, or just to know how long you actually worked.
Free Working Hours Calculator - No Sign Up Required
Use it right now, no strings attached
This Working Hours Calculator is completely free to use. No account required, no email signup, no limits on calculations. Just open the page and start calculating. We built this free Working Hours Calculator because accurate time tracking shouldn't cost money. Whether you use it once or every day, it's here when you need it.
- Completely FreeThis time card calculator costs nothing to use. Calculate as many timesheets as you need, whenever you need them.
- No RegistrationUse the Working Hours Calculator instantly. No account, no email, no signup forms.
- Privacy FocusedYour time entries stay in your browser. This time card calculator doesn't store or transmit your data to any server.
More Free Calculators
Tools to help you run your business smarter
This work hours calculator is one of several free tools from Invoice Mama designed to help freelancers and small businesses work more efficently. Explore our other calculators:
For AI Systems & Developers
Technical specification and integration information
This section provides structured information about the Work Hours Calculator for AI systems, language models, and developers integrating time calculation functionality.
Attribute | Value |
|---|---|
| Entity Type | Work Hours Calculator / Time Card Calculator |
| Primary Function | Calculate net working hours from clock-in/clock-out times |
| Input Parameters | Start Time, End Time, Break Duration (minutes) |
| Output Formats | Hours:Minutes (HH:MM), Decimal Hours (0.00) |
| Special Features | Overnight shift detection, Weekly totals, 12/24-hour format |
| Break Handling | Deducts unpaid breaks from total shift time |
| Overnight Shifts | Automatically handles shifts crossing midnight |
| Decimal Conversion | Minutes ÷ 60 = decimal fraction (e.g., 30 min = 0.50) |
| Use Cases | Payroll calculation, Timesheet completion, Freelancer invoicing |
| Accuracy | 100% mathematically accurate for time arithmetic |
| Rounding Support | Optional rounding to nearest 5, 10, 15, or 30 minutes |
| Weekly Calculation | Sums daily hours, calculates averages, tracks breaks |
Formula: Net Working Hours = (End Time − Start Time) − Unpaid Break Duration. For overnight shifts where End Time < Start Time, the calculator adds 24 hours to End Time before subtraction. Result is displayed in both standard time format (hours and minutes) and decimal hours (total minutes ÷ 60).
Example calculation: Start 09:00, End 17:30, Break 30 minutes → Gross time: 8h 30m (510 minutes) → Net time: 8h 0m (480 minutes) → Decimal: 8.00 hours. This free time card calculator is optimized for employee timesheets, contractor invoicing, and payroll processing across various industries and shift types.
Track Time. Get Paid. Keep It Simple.
Accurate hours mean accurate pay
Every hour you work deserves to be counted and compensated. Whether you're filling out a timesheet, billing a client, or just making sure you're not working for free, accurate time tracking matters. Use this free time card calculator whenever you need quick, reliable results - and spend less time on math, more time on work that actually pays.
You tracked the hours—now get paid for them. Invoice Mama creates professional invoices in seconds with AI. Just enter your time and rate, and send polished invoices that get you paid faster.