Time Calculator
Add, subtract, multiply, divide time values and calculate time between dates
Time Operations Calculator
Add Time Values
Result
Example Calculations
Daily Tasks Time Addition
Task 1: Feeding rabbit - 12 minutes
Task 2: Cooking dinner - 1h 15 minutes
Task 3: Calling Uncle Bob - 53 minutes
Total time: 2h 20 minutes
Work Schedule Calculation
8-hour workday minus 1h 30min breaks = 6h 30min productive time
Project Time Estimation
Paint fence: 23 minutes for 1/5 of fence
Total fence time: 23 min × 5 = 1h 55 minutes
Time Conversion Reference
Time Calculator Tips
Add up to 20 time values for complex calculations
Use decimal multipliers (e.g., 1.5) for fractional calculations
Negative results indicate time deficit or reverse duration
Date calculations automatically handle time zones in UTC
Results can be displayed in different units for convenience
Understanding Time Calculations
Time Addition
When adding time values, convert each to seconds, sum them up, then convert back to the desired format. The calculator handles overflow automatically (e.g., 90 seconds becomes 1m 30s).
Time Subtraction
Subtraction works by converting both times to seconds, subtracting the second from the first, then formatting the result. Negative results indicate the second time is larger.
Hexadecimal Time System
Time uses base-60 (hexadecimal) system: 60 seconds = 1 minute, 60 minutes = 1 hour. This is different from our normal base-10 decimal system, making manual calculations complex.
Multiplication & Division
These operations convert time to seconds, perform the arithmetic operation, then convert back. Useful for scaling time estimates or calculating portions of time periods.
Date Calculations
Date and time differences calculate the exact duration between two points in time, accounting for different day lengths, months, and leap years automatically.
Common Use Cases
- •Project time estimation and tracking
- •Work schedule planning
- •Event duration calculations
- •Age and anniversary calculations