Time Calculator
Perform time arithmetic operations including addition, subtraction, and complex expressions. Calculate time differences, add or subtract time from dates, and solve time-based problems.
Time Calculator
Choose from three calculation modes: basic time arithmetic, date/time calculations, or complex time expressions.
Time Addition & Subtraction
How to Use the Time Calculator
Basic Time Operations
- Enter time values using days, hours, minutes, and seconds
- Select addition (+) or subtraction (-) operation
- Click Calculate to see the result
- Results automatically handle overflow (e.g., 70 minutes becomes 1h 10m)
Date & Time Calculations
- Set a starting date and time
- Enter the amount of time to add or subtract
- Get the exact resulting date and time
- Useful for scheduling and deadline calculations
Expression Syntax
Use mathematical expressions with time units for complex calculations:
2h 30m + 1h 15mBasic addition
1d 12h - 6h 30mMixed units subtraction
3600s + 2h - 30mSeconds conversion
5d + 12h + 30mMultiple additions
About Time Calculations
Time Units
SecondBase unit
Minute60 seconds
Hour60 minutes
Day24 hours
Week7 days
Month~30.44 days
Common Applications
- Project time tracking and management
- Calculating work hours and overtime
- Travel time planning and scheduling
- Cooking and baking time calculations
- Exercise and workout duration planning
- Event planning and timeline creation
Calculation Precision
Our time calculator handles precise arithmetic with automatic unit conversion. All calculations maintain accuracy down to the second level, with proper handling of time overflow and negative results.
Quick Actions
Related Calculators
Calculator Features
- Basic time addition and subtraction
- Date and time calculations
- Complex expression parsing
- Automatic unit conversion
- Negative time handling
- Multiple input formats