Minutes to decimal hours: the chart payroll uses
Payroll systems do not pay you in hours and minutes — they pay in decimal hours. 7 hours 45 minutes is not 7.45 hours, and that small misunderstanding quietly shrinks a lot of paychecks.
The one formula
Decimal hours = hours + (minutes ÷ 60). That is all of it. 45 minutes ÷ 60 = 0.75, so 7:45 becomes 7.75 hours. At $20 an hour, 7.75 × $20 = $155. If you had used 7.45 instead, you would have shorted yourself $6 on a single day.
Conversion chart
| Minutes | Decimal hours |
|---|---|
| 5 minutes | 0.08 |
| 10 minutes | 0.17 |
| 15 minutes | 0.25 |
| 20 minutes | 0.33 |
| 25 minutes | 0.42 |
| 30 minutes | 0.50 |
| 35 minutes | 0.58 |
| 40 minutes | 0.67 |
| 45 minutes | 0.75 |
| 50 minutes | 0.83 |
| 55 minutes | 0.92 |
| 60 minutes | 1.00 |
Why totals can look "wrong"
Add up a week in decimal and you may get 38.74 where the h:mm total says 38:45 (38.75). That one-hundredth gap is rounding: each day was rounded to two decimals before adding. Most payroll systems total the exact minutes first and convert once at the end — the method that gives the slightly higher, and correct, figure. Our calculator totals your real minutes the same way.
Common traps
- Typing 7.30 for 7 hours 30 minutes. 7:30 is 7.50, not 7.30.
- Forgetting the break. Decimal conversion happens after unpaid breaks come off.
- Rounding every day down. Some employers round punches to the nearest 5, 6 or 15 minutes, which is legal only if it averages out fairly over time — it may never only round in the employer's favour.
Keep your own decimal total for a week and compare it with your pay stub. A difference of a few hundredths is rounding; a difference of half an hour is a conversation with payroll.
Try it free
Skip the hand maths — the Time Card Calculator does all of this automatically, with your state's rules built in.