Standard: International Labor Norm

Hours Calculator

Calculate work hours, break deductions, industrial hours (decimal time), overtime balance, and your earnings with high precision.

24-Hour Work Cycle

00:00 06:00 12:00 18:00 8h 15m = 8.25 h NET WORKING TIME
Net Working Hours Net
8h 15m (8.25 h)
Total Duration (Gross) 9h 00m
Break Deduction -45 min
Start
Format: HH:MM (e.g. 08:00)
Deduction
min
Standard rule: from 6h = 30 min., from 9h = 45 min.
End
Format: HH:MM (e.g. 08:00)
Break quick selection:
Decimal places:

What is an Hours Time Calculator?

An hours time calculator is a digital tool that processes time values in various formats. The calculator converts hours and minutes into decimal hours and calculates time differences between two clock times.

The hours time calculator performs 3 central tasks:

  • Calculate time duration: Determine difference between work start and finish, deduct break duration, and output net work time in hours and minutes
  • Add and subtract hours: Sum up multiple time blocks (e.g. morning + afternoon) or deduct minutes accurately
  • Convert to decimal hours: Convert minutes into hours as a decimal – 30 minutes become 0.50 industrial hours, 15 minutes become 0.25 industrial hours

An online time calculator replaces manual calculations with hours, minutes, and seconds. The calculator also handles overnight night shifts across midnight smoothly.

Interactive Minutes → Decimal Hours
15 Minutes = 0,25 h

Click a value or drag the pointer on the wheel

Step by Step Calculate Duration
−
−
min
1
Gross Duration (End − Start) 8h 45m
2
Break Deduction −30 min
3
Net Work Time 8h 15m
✓
Decimal Hours 8,25 h

Change times – the calculation updates instantly

Calculate Hours and Minutes

Calculating hours and minutes works in 3 steps: determine gross duration, deduct break time, and convert the result to decimal hours. The calculator handles these steps automatically.

The time calculator calculates the difference between two times using this formula:

Net Working Time = (End Time − Start Time) − Break Time

Converting hours and minutes to decimal hours is done by dividing the minutes by 60:

  • 15 minutes ÷ 60 = 0.25 decimal hours (industrial hours)
  • 30 minutes ÷ 60 = 0.50 decimal hours (industrial hours)
  • 45 minutes ÷ 60 = 0.75 decimal hours (industrial hours)
  • 20 minutes ÷ 60 = 0.33 decimal hours (industrial hours)

Adding hours is done by summing up minutes. For example, 90 minutes divided by 60 equals 1 hour and 30 minutes, or 1.50 decimal hours. Subtracting hours follows the same principle in reverse.

Time Calculator for Work and Hours

The work hours calculator computes daily working time from start to finish and deducts mandatory break times. The result displays net hours, overtime balance, and total earnings based on your hourly wage.

An hours time calculator processes 5 input values:

  • Start Time: Clock time when work begins (e.g. 08:00 AM)
  • End Time: Clock time when work finishes (e.g. 05:00 PM)
  • Break Duration: Total break in minutes (e.g. 45 minutes required by labor regulations)
  • Hourly Wage: Optional gross hourly rate for calculating total compensation
  • Target Hours: Daily expected work hours (e.g. 8.0 hours) to track overtime balance

The working time calculator accurately handles shifts that span midnight. In an overnight shift from 22:00 to 06:00, the tool detects the day transition and computes 8 gross hours. Deducting a 45-minute break results in 7 hours 15 minutes of net work time (7.25 decimal hours).

Daily Schedule Workday Timeline
Morning
Break
Afternoon
06:00 08:00 12:00 12:45 17:00 20:00
Start 08:00
Break 45 min
Finish 17:00
Net Work Time 8h 15m

Choose a schedule preset – the visual timeline updates instantly

More Time Calculators

In addition to work time calculation, the tool provides 3 further functions:

➕

Add Hours Calculator

Add any number of time entries together. Sum minutes and hours in a structured list.

🔢

Decimal Hours Converter

Convert hours and minutes into industrial hours. 8 hours and 30 minutes become 8.50 decimal hours for payroll.

📊

Weekly Timesheet

Calculate work hours for the whole week from Monday to Sunday, tracking overtime and total hours.

All Time Calculator Tools

6 specialized calculators for every working time calculation – from simple addition to reverse calculation. Each tool solves a specific task.

Add Hours

Sum up time values

Add multiple time entries in hours and minutes. Ideal for project times, shift work, and weekly overviews.

Open Tool

Subtract Hours

Calculate time difference

Deduct time values from each other – calculate breaks, interruptions, or overtime adjustments in seconds.

Open Tool

Hours with Break

Determine net work time

Calculate working time minus breaks – with automatic consideration of legal labor law break regulations.

Open Tool

Hours from To

Start to end time

Calculate working hours between two times – including overnight day shifts and decimal conversion.

Open Tool

Hours Backwards

Calculate start time backwards

Calculate backwards from finish time – When must I start if I want to complete X hours by 5:00 PM?

Open Tool

Time + Hours

Forecast end time

Add hours and minutes to a clock time – Calculate when you will finish if you work X hours starting now.

Open Tool

Weekly Working Hours Calculator (Monday to Sunday)

Track your daily working hours and automatically calculate weekly net hours, target balance, and overtime.

Day Start End Break (Min) Net (HH:MM) Net (Decimal) Balance (±)
Monday 8:00 h 8.00 h ±0.00 h
Tuesday 8:00 h 8.00 h ±0.00 h
Wednesday 8:00 h 8.00 h ±0.00 h
Thursday 8:00 h 8.00 h ±0.00 h
Friday 8:00 h 8.00 h ±0.00 h
Saturday 8:00 h 8.00 h ±0.00 h
Sunday 8:00 h 8.00 h ±0.00 h
Weekly Total: 40h 00m 40.00 h ±0.00 h (Balanced)

Direct Decimal Hours Converter (Industrial Time)

Convert standard clock time (HH:MM) to decimal hours and vice versa.

1 min 0,02 h
2 min 0,03 h
3 min 0,05 h
4 min 0,07 h
5 min 0,08 h
6 min 0,10 h
7 min 0,12 h
8 min 0,13 h
9 min 0,15 h
10 min 0,17 h
11 min 0,18 h
12 min 0,20 h
13 min 0,22 h
14 min 0,23 h
15 min 0,25 h
16 min 0,27 h
17 min 0,28 h
18 min 0,30 h
19 min 0,32 h
20 min 0,33 h
21 min 0,35 h
22 min 0,37 h
23 min 0,38 h
24 min 0,40 h
25 min 0,42 h
26 min 0,43 h
27 min 0,45 h
28 min 0,47 h
29 min 0,48 h
30 min 0,50 h
31 min 0,52 h
32 min 0,53 h
33 min 0,55 h
34 min 0,57 h
35 min 0,58 h
36 min 0,60 h
37 min 0,62 h
38 min 0,63 h
39 min 0,65 h
40 min 0,67 h
41 min 0,68 h
42 min 0,70 h
43 min 0,72 h
44 min 0,73 h
45 min 0,75 h
46 min 0,77 h
47 min 0,78 h
48 min 0,80 h
49 min 0,82 h
50 min 0,83 h
51 min 0,85 h
52 min 0,87 h
53 min 0,88 h
54 min 0,90 h
55 min 0,92 h
56 min 0,93 h
57 min 0,95 h
58 min 0,97 h
59 min 0,98 h
60 min 1,00 h

Frequently Asked Questions

Everything you need to know about calculating work hours, pause regulations, and industrial decimals.

An hours calculator computes the exact time difference between two clock times. It converts hours and minutes into decimal hours and deducts breaks for net working time.

Subtract start time from end time for gross duration, then deduct the break in minutes. Divide remaining minutes by 60 to convert the final result into decimal hours.

One hour contains exactly 60 minutes, and each minute contains 60 seconds. Dividing minutes by 60 converts them into decimal hours (e.g. 15 minutes equals 0.25 hours).

Divide 30 minutes by 60: 30 ÷ 60 = 0.50 decimal hours (industrial hours). This represents exactly half an hour in payroll systems and digital timesheets.

Enter your start time, end time, and break duration into the calculator. The tool subtracts breaks from gross duration to show net hours, decimal time, and total earnings.

Yes, the calculator detects night shifts automatically. When the end time is earlier than start time (e.g. 22:00 to 06:00), it adds 24 hours to calculate the full duration.