Convert hours and minutes into decimal hours for payroll, timesheets, invoices, billing, work logs, and shift tracking. This free Time to Decimal Calculator helps you quickly change normal time into decimal format, calculate work hours, estimate gross pay, and total weekly hours.
Use the calculator below to convert time formats, calculate decimal work hours, and check weekly totals without manual spreadsheet formulas.
Decimal time calculator
Time Conversion Tool
Convert hours and minutes, HH:MM values, decimal hours, work shifts, weekly timesheets, and payroll estimates.
Main Time Conversion Tool
Convert between standard time and decimal time.
Hours and Minutes
HH:MM to Decimal
Decimal to Time
Saved data stays only in this browser.
Work Hours Calculator
Calculate one shift with a break deduction.
Payroll Helper
Estimate gross pay from decimal hours and hourly rate.
Advanced Weekly Timesheet
Open this section to total Monday to Sunday work hours.
| Day | Start | End | Break | Overnight | Daily hours | Daily decimal |
|---|---|---|---|---|---|---|
| Monday | 0 hours 0 minutes | 0.00 | ||||
| Tuesday | 0 hours 0 minutes | 0.00 | ||||
| Wednesday | 0 hours 0 minutes | 0.00 | ||||
| Thursday | 0 hours 0 minutes | 0.00 | ||||
| Friday | 0 hours 0 minutes | 0.00 | ||||
| Saturday | 0 hours 0 minutes | 0.00 | ||||
| Sunday | 0 hours 0 minutes | 0.00 |
Common Conversion Chart
Quick minute-to-decimal reference.
| Minutes | Decimal hours |
|---|---|
| 5 minutes | 0.08 |
| 10 minutes | 0.17 |
| 15 minutes | 0.25 |
| 20 minutes | 0.33 |
| 30 minutes | 0.50 |
| 45 minutes | 0.75 |
| 60 minutes | 1.00 |
Results are estimates for general planning only. For payroll, tax, employment, or legal decisions, always check official records or speak to a qualified professional.
What Is a Time to Decimal Calculator?
A Time to Decimal Calculator converts hours and minutes into decimal hours. This is useful when time needs to be entered into payroll systems, timesheets, invoices, billing software, or work hour reports.
For example, 7 hours and 30 minutes is not written as 7.30 in decimal time. It is written as 7.50 because 30 minutes is half of one hour.
This calculator helps avoid common mistakes when converting minutes into decimal hours.
How to Convert Time to Decimal Hours
To convert minutes into decimal hours, divide the minutes by 60 and add the result to the full hours.
For example:
7 hours 30 minutes = 7 + 30 ÷ 60
7 hours 30 minutes = 7.50 decimal hours
So if you worked 7 hours and 30 minutes, your decimal time is 7.50 hours.
Common Time to Decimal Conversions
| Time | Decimal Hours |
|---|---|
| 5 minutes | 0.08 |
| 10 minutes | 0.17 |
| 15 minutes | 0.25 |
| 20 minutes | 0.33 |
| 30 minutes | 0.50 |
| 45 minutes | 0.75 |
| 1 hour | 1.00 |
These values are useful for payroll, timesheets, staff scheduling, freelance billing, and job costing.
Why Decimal Hours Matter for Payroll
Payroll systems usually calculate pay using decimal hours, not standard hours and minutes.
For example, if someone works 8 hours and 30 minutes at £15 per hour, the decimal time is 8.50 hours.
8.50 × £15 = £127.50 gross pay
If the time was entered incorrectly as 8.30 hours, the pay calculation would be wrong. That is why decimal time conversion matters for accurate payroll and work hour records.
Time to Decimal for Timesheets
Many timesheets require work hours in decimal format. This is common for:
- Employee time tracking
- Contractor invoices
- Freelance billing
- Shift work
- Overtime tracking
- Payroll reports
- Project time logs
The calculator helps convert clock times, breaks, and weekly hours into a clean decimal total.
Hours and Minutes to Decimal
Use the hours and minutes section when you already know the total time worked.
Examples:
| Hours and Minutes | Decimal Hours |
|---|---|
| 6 hours 15 minutes | 6.25 |
| 7 hours 30 minutes | 7.50 |
| 8 hours 45 minutes | 8.75 |
| 9 hours 15 minutes | 9.25 |
This is the fastest option when you do not need to enter start and end times.
HH:MM to Decimal Time
Use the HH:MM converter when your time is written in clock-style format.
Examples:
| HH:MM | Decimal Hours |
|---|---|
| 06:15 | 6.25 |
| 07:30 | 7.50 |
| 08:45 | 8.75 |
| 10:30 | 10.50 |
This format is useful when copying time from schedules, logs, or time tracking apps.
Decimal to Hours and Minutes
You can also convert decimal hours back into normal hours and minutes.
Examples:
| Decimal Hours | Hours and Minutes |
|---|---|
| 6.25 | 6 hours 15 minutes |
| 7.50 | 7 hours 30 minutes |
| 8.75 | 8 hours 45 minutes |
| 9.10 | 9 hours 6 minutes |
This is helpful when a payroll report gives decimal hours but you want to understand the real time worked.
Work Hours and Break Time
The work hours calculator section lets you enter:
- Start time
- End time
- Break duration
- Overnight shift option
It then calculates the total time worked and the decimal hours after deducting breaks.
For example:
Start: 09:00
End: 17:30
Break: 30 minutes
Total worked time: 8 hours
Decimal hours: 8.00
Weekly Work Hours Calculator
The weekly table helps calculate hours from Monday to Sunday. You can enter daily start times, end times, and break minutes to get a weekly total.
This is useful for:
- Weekly timesheets
- Staff work hours
- Part-time job tracking
- Shift planning
- Contractor billing
- Overtime estimates
The weekly total can also be used with the hourly rate field to estimate gross pay.
Payroll and Gross Pay Estimate
The payroll helper estimates gross pay by multiplying decimal hours by hourly rate.
Formula:
Decimal Hours × Hourly Rate = Gross Pay
Example:
40 decimal hours × £15 = £600 gross pay
This is only a general estimate. It does not include tax, pension, deductions, overtime rules, holiday pay, or employer-specific payroll policies.
Time to Decimal Formula
The basic formula is:
Decimal Hours = Hours + Minutes ÷ 60
Examples:
30 minutes ÷ 60 = 0.50
15 minutes ÷ 60 = 0.25
45 minutes ÷ 60 = 0.75
That is why 8 hours 45 minutes becomes 8.75 decimal hours.
Related Calculators
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Time Duration Calculator
Salary Calculator
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Frequently Asked Questions
What is 30 minutes in decimal hours?
30 minutes is 0.50 decimal hours because 30 minutes is half of one hour.
What is 15 minutes in decimal hours?
15 minutes is 0.25 decimal hours because 15 ÷ 60 = 0.25.
What is 45 minutes in decimal hours?
45 minutes is 0.75 decimal hours because 45 ÷ 60 = 0.75.
Is 7 hours 30 minutes written as 7.30 or 7.50?
7 hours 30 minutes is written as 7.50 in decimal hours. Writing it as 7.30 is a common mistake.
How do I convert minutes to decimal hours?
Divide the number of minutes by 60. For example, 20 minutes ÷ 60 = 0.33 decimal hours.
How do I calculate payroll using decimal hours?
Multiply decimal hours by the hourly rate. For example, 8.50 hours × £12 per hour = £102 gross pay.
Can this calculator handle breaks?
Yes. The work hours section lets you enter break minutes and deducts them from the total worked time.
Can this calculator handle overnight shifts?
Yes. Use the overnight option if the shift starts on one day and ends the next day, such as 22:00 to 06:00.
What is decimal time used for?
Decimal time is commonly used for payroll, timesheets, invoices, billing, work logs, staff scheduling, and project tracking.
Is this calculator suitable for official payroll?
This calculator gives general estimates. For official payroll, tax, employment, or legal decisions, always check official records or speak to a qualified professional.
Disclaimer
This calculator is for general planning and estimation only. Results may vary depending on workplace rules, payroll settings, rounding policies, overtime rules, tax deductions, breaks, and employment agreements. Always check your official timesheet, payslip, payroll system, or employer policy before making financial or employment decisions.