Time Calculator
Add, subtract, and calculate time with precision. Perfect for time management, scheduling, and time-based calculations.
Free Tool
Time Calculator
Add or subtract two time values
Add/Subtract Time from Date
Calculate new date and time by adding or subtracting time
Time Expression Calculator
Calculate time using expressions with d, h, m, s units
Time Units Reference
| Unit | Definition |
|---|---|
| Millennium | 1,000 years |
| Century | 100 years |
| Decade | 10 years |
| Year (average) | 365.242 days or 12 months |
| Common year | 365 days or 12 months |
| Leap year | 366 days or 12 months |
| Quarter | 3 months |
| Month | 28-31 days |
| Week | 7 days |
| Day | 24 hours or 1,440 minutes or 86,400 seconds |
| Hour | 60 minutes or 3,600 seconds |
| Minute | 60 seconds |
| Second | Base unit |
| Millisecond | 10⁻³ second |
| Microsecond | 10⁻⁶ second |
| Nanosecond | 10⁻⁹ second |
| Picosecond | 10⁻¹² second |
About Time Calculator
Our comprehensive time calculator provides three powerful tools for all your time calculation needs. Whether you need to add or subtract time values, calculate future dates, or evaluate complex time expressions, our calculator handles it all with precision.
Features:
- Time Addition & Subtraction: Calculate the sum or difference between two time values
- Date Time Calculator: Add or subtract time from any date to find future or past dates
- Expression Calculator: Evaluate complex time expressions using mathematical operators
- Multiple Units: Support for days, hours, minutes, and seconds
- Mobile Responsive: Works perfectly on all devices
Quick Tips
- Leave fields blank for zero values
- Use expression format: "1d 2h 3m 4s"
- Combine operations with + and - signs
- Perfect for project planning and scheduling