Time Calculator: Add, Subtract, Diff & Convert Time

Free tool to calculate time: add hours, subtract, find duration between times, convert to decimal, and calculate time and a half.

Format HH:MM

Days
Hours
Minutes
Seconds
Quick:
Result
09:30:00

24h Visualization

00:0006:0012:0018:0024:00

How to calculate time and a half / double time?

Calculating overtime pay is common. For "Time and a half" (1.5x), simply multiply your duration by 1.5.

Tip: Use the "Multiplier" mode. Enter duration (e.g., 08:00) and perform x1.5 or x2 instantly.

Same logic applies for double time. Great for payroll estimations.

What can you do with this Time Calculator?

Time management is key for payroll, travel planning, or logging work hours. This versatile calculator handles all time-related operations instantly.

Switch modes to add work hours, calculate time differences, or convert time formats seamlessly.

Usage Examples

ExampleOutput
8:00 AM + 7h30m (Work day)
5:00 PM - 8:30 AM (Duration)
Convert 1h30m to 1.5h

Quick Conversion Table

+ Minutesh:mm
+150:15
+300:30
+450:45
+601:00

Limitations

Handles 24h cycles automatically. Use the "Days" field for multi-day calculations.

How it works

Simply enter your times. The tool auto-detects formats and computes results in real-time.