Hours to Decimal Calculator
The free decimal hour calculator built for payroll, timesheets, and invoicing. Instantly convert hours and minutes to decimal hours.
1h 45m=1.7500 decimal hours
How to Convert Time to Decimal
The time to decimal conversion is a one-step formula: keep the whole hours as they are, then divide the minutes by 60. Add the two together and you have decimal hours — the format every payroll, invoicing and time-tracking system expects.
- 2:30 → 2 + (30 ÷ 60) = 2.50 decimal hours
- 7:45 → 7 + (45 ÷ 60) = 7.75 decimal hours
- 8:15 → 8 + (15 ÷ 60) = 8.25 decimal hours
Prefer to skip the math? Enter any HH:MM value in the Hours to Decimal Calculator above and it runs the time to decimal conversion instantly, ready to copy into your timesheet or invoice.
Decimal Hours for Payroll
Payroll software multiplies hours by an hourly wage — and that math only works when time is stored as decimal hours. A quarter-hour, half-hour and three-quarter-hour convert to clean, round decimal values that every payroll, accounting and invoicing system accepts without rounding surprises.
So a worker who logs 8 hours 15 minutes on Monday enters 8.25 into payroll. 8 hours 30 minutes is 8.50, and 8 hours 45 minutes is 8.75. Multiply the total decimal hours for the pay period by the hourly wage to get gross wages — no more HH:MM headaches.
Use the calculator above, or see the full minutes-to-decimal conversion table below for every 5-minute value.
Why Use a Decimal Hour Calculator for Payroll?
Modern payroll software, invoicing platforms and accounting systems don't read time in the HH:MM format humans use on a clock — they need hours stored as a single decimal number so they can multiply cleanly by an hourly wage. A decimal hour calculator handles this conversion for you, turning a timesheet entry like 7:45 into 7.75 decimal hours in a single step.
The most common mistake is a rounding error. 15 minutes is 0.25 decimal hours, not 0.15. 30 minutes is 0.50, not 0.30. Confusing the two disrupts an entire payroll run — each employee ends up with the wrong gross pay, which then flows through to tax withholdings and net pay. Using a dedicated decimal hour calculator eliminates this risk entirely.
For small businesses running payroll in-house, for freelancers billing hourly, and for accounting teams importing timesheets into systems like QuickBooks, ADP or Gusto, converting to decimal hours is a non-negotiable step. The calculator at the top of this page does the math instantly and shows results rounded to 2, 3 or 4 decimal places depending on how precise your payroll provider wants the value.
What is decimal time?
Decimal time expresses a duration as a single number instead of hours and minutes. For example, 1 hour and 45 minutes is written as 1.75.
Payroll, accounting and time-tracking systems use decimal hours because they multiply cleanly with an hourly rate. Multiplying7:45 by an hourly rate doesn’t work, but multiplying 7.75 does.
The Hours to Decimal Calculator above does the conversion in real time so you can copy the number straight into your timesheet, invoice, or spreadsheet.
- 15 min0.25
- 30 min0.5
- 45 min0.75
- 1 h 30 m1.5
- 7 h 45 m7.75
- 8 h 20 m8.3333
The time to decimal formula, walked through
Here's the full decimal hours formula, including seconds for when you need sub-minute precision. Most payroll only needs hours and minutes, but the calculator above supports all three.
Start with whole hours
Take the number of full hours as-is. For 2h 30m, that’s 2.
Divide minutes by 60
30 ÷ 60 = 0.5. This gives the fractional hour portion.
Add them together
2 + 0.5 = 2.5 decimal hours. That’s your payroll-ready number.
Decimal Hour Chart (Minutes to Decimal)
A quick printable decimal hour chart showing minutes converted to decimal hours at 5-minute intervals — the most common reference used in payroll offices, timesheet software and invoicing systems. Press Cmd+P (or Ctrl+P on Windows) to print just the chart.
Need an exact conversion? For exact minute-by-minute conversions, use the decimal hour calculator at the top of this page.
| Minutes | Decimal hours |
|---|---|
| 5 min | 0.08 |
| 10 min | 0.17 |
| 15 min | 0.25 |
| 20 min | 0.33 |
| 25 min | 0.42 |
| 30 min | 0.50 |
| 35 min | 0.58 |
| 40 min | 0.67 |
| 45 min | 0.75 |
| 50 min | 0.83 |
| 55 min | 0.92 |
| 60 min | 1.00 |
Tenths of an Hour Chart
Some payroll systems (particularly those used for attorney billing and certain government timesheets) round to tenths of an hour — that is, every 6 minutes equals one tenth (0.1).
| Minutes | Tenths of an hour |
|---|---|
| 6 min | 0.1 |
| 12 min | 0.2 |
| 18 min | 0.3 |
| 24 min | 0.4 |
| 30 min | 0.5 |
| 36 min | 0.6 |
| 42 min | 0.7 |
| 48 min | 0.8 |
| 54 min | 0.9 |
| 60 min | 1.0 |
Minutes to decimal hours conversion table
A quick reference for converting common minute values to decimal hours. Most payroll systems round to 2 decimals.
| Minutes | Decimal hours |
|---|---|
| 5 min | 0.0833 |
| 10 min | 0.1667 |
| 15 min | 0.25 |
| 20 min | 0.3333 |
| 25 min | 0.4167 |
| 30 min | 0.5 |
| 35 min | 0.5833 |
| 40 min | 0.6667 |
| 45 min | 0.75 |
| 50 min | 0.8333 |
| 55 min | 0.9167 |
| 60 min | 1.0 |
Who uses decimal hours?
Any time an hourly duration is multiplied by a rate — wages, billable time, utilization — decimal hours are the standard format.
Payroll & HR teams
Convert timesheet entries from HH:MM into decimal hours so payroll systems can multiply by wage rates without rounding errors.
Freelancers & contractors
Bill clients accurately. Convert tracked time like 2:45 into 2.75 before invoicing at your hourly rate.
Accountants & bookkeepers
Normalize timesheets from multiple sources before importing into accounting software or job-costing spreadsheets.
Small business owners
Pay hourly employees fairly. Convert shift times into decimal hours for a single source of truth across payroll runs.
Project managers
Track team utilization and project hours in decimal format for cleaner reports and capacity planning.
Consultants & agencies
Match your time-tracking output to the decimal format required by most client billing and ERP systems.
Frequently asked questions
Common questions about converting hours and minutes to decimal hours.
A decimal hour calculator converts time entered as hours and minutes (HH:MM) into a single decimal number. For example, 1 hour 15 minutes becomes 1.25 decimal hours. Payroll, invoicing and accounting systems need this decimal format so they can multiply hours worked directly by an hourly rate to get accurate pay and billing totals.
To convert hours to decimal, keep the whole hours as they are and divide the minutes by 60. For example, 6 hours 45 minutes becomes 6 + (45 ÷ 60) = 6.75 decimal hours. The Hours to Decimal Calculator above runs this time to decimal conversion automatically for any HH:MM value you enter.
8 hours 15 minutes equals 8.25 decimal hours. The calculation is 8 + (15 ÷ 60) = 8.25. This is a common payroll value — a standard workday with an extra 15-minute block logged as decimal hours.
Payroll systems need decimal hours so they can multiply cleanly by an hourly wage. Take each timesheet entry, keep the whole hours, then divide the minutes by 60: 15 min = 0.25, 30 min = 0.50, 45 min = 0.75. Add up the decimal hours for the pay period, then multiply by the hourly rate to get gross wages.
The time to decimal formula is: decimal hours = hours + (minutes ÷ 60) + (seconds ÷ 3600). For most payroll and timesheet use cases you can ignore seconds — just hours + minutes ÷ 60. Example: 7:45 → 7 + (45 ÷ 60) = 7.75 decimal hours.
Divide the number of minutes by 60. For example, 15 minutes ÷ 60 = 0.25 hours, and 45 minutes ÷ 60 = 0.75 hours. The Hours to Decimal Calculator above does this instantly for any HH:MM value.
1 hour 20 minutes equals 1.3333 decimal hours (rounded: 1.33). The calculation is 1 + (20 ÷ 60) = 1.3333.
7 hours 30 minutes equals 7.5 decimal hours. That is 7 + (30 ÷ 60) = 7.5.
Payroll, accounting and time-tracking systems multiply hours by hourly rates. Decimal hours (like 7.75) multiply cleanly with dollars and cents, while “7:45” does not. Converting to decimal removes errors and makes reports easier to audit.
Take the whole number as hours, then multiply the decimal portion by 60 to get minutes. Example: 2.75 → 2 hours and (0.75 × 60) = 45 minutes, so 2h 45m.
Yes. The calculator runs entirely in your browser. There is no signup, no data upload, and no cost — it’s free for personal and business use.
Yes. Toggle “Include seconds” to add a seconds field. Decimal hours are then computed as hours + minutes/60 + seconds/3600.
The math is exact — the formula is deterministic. You can view results at 2, 3, or 4 decimal places. Most payroll and invoicing systems use 2 decimal places.