Time Calculator

Add or subtract hours, minutes, and seconds. Calculate time duration between two clock times. Perfect for timesheet calculations.

⚡ Quick Calculator Get a fast estimate

Hours

Minutes

Seconds

Add Hours

Add Minutes

Add Seconds

Result

05:15:00

Total Hours

5,25 hrs

Total Minutes

315 min

Total Seconds

18 900 sec

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How to Use This Calculator

Use Add / Subtract Time to combine two time durations — useful for adding up hours worked across different tasks. Use Time Between Two Times to find the duration of a work shift, meeting, or event. Overnight crossings (e.g. 22:00 to 06:00) are handled automatically.

The Extended Calculator below adds decimal conversion, payroll calculation, and a visual clock SVG. The Professional Calculator is a full timesheet with overlap detection and overtime calculation.

Need more detail?

📊 Extended Calculator More options, charts, and scenario comparison

First Time (HH:MM:SS)

Operation

Second Time (HH:MM:SS)

Result

10:15:00

Total Hours

10.2500

Total Minutes

615.00

Time Addition Formula

Total Seconds = (H1×3600 + M1×60 + S1) + (H2×3600 + M2×60 + S2) Result Hours = Total Seconds ÷ 3600 (integer) Result Minutes = (Total Seconds mod 3600) ÷ 60 Result Seconds = Total Seconds mod 60

Example

Freelancer Timesheet

Monday: 3h 45min. Tuesday: 5h 20min. Wednesday: 2h 50min.

Step 1: 3:45 + 5:20 = 9:05

Step 2: 9:05 + 2:50 = 11:55

Total hours worked: 11 hours 55 minutes

At R500/hour: R5,958.33

Need full precision?

🔬 Professional Calculator Complete parameters, sensitivity analysis, and detailed breakdown

Hourly Rate (R)

Standard Day (hours)

Overtime Multiplier

Date	Description	Start	End	Break	Duration
					4:00
					1:00
					2:30
					1:30

Total Time Logged

9:00 (9.00 hrs)

Regular Pay

R 2 000

Overtime (1:00)

R 375

Total Pay

R 2 375

Frequently Asked Questions

Divide the minutes by 60 and add to the hours. For example: 3 hours 45 minutes = 3 + (45/60) = 3.75 hours. This decimal format is what most billing and payroll systems use. 30 minutes = 0.5 hours, 15 minutes = 0.25 hours.

The BCEA sets the standard working hours at 45 hours per week, typically 9 hours per day for a 5-day week. Many employers use 40 hours (8 hours × 5 days). Any time worked beyond the agreed hours is overtime, subject to BCEA overtime provisions.

Yes. The Add/Subtract tab handles any number of hours — useful for calculating total hours worked over a week or project period. Results over 24 hours simply continue counting (e.g. 30:15:00 means 30 hours and 15 minutes).

Convert hours and minutes to decimal hours (minutes ÷ 60), then multiply by your hourly rate. For example: 11 hours 55 minutes = 11.917 hours × R500/hour = R5,958.50. For overtime, use 1.5× or 2× your normal rate as applicable under the BCEA.