Time Calculator
Add or subtract time, convert between units, and perform precise time calculations
Time Calculator
Time Arithmetic
Results
Enter values and click "Calculate" to see the results
Understanding Time Calculations
Time Units
Time is measured in various units, from nanoseconds to years. Understanding the relationships between these units is crucial for accurate time calculations.
Common Time Units
- • 1 second = 1,000 milliseconds
- • 1 minute = 60 seconds
- • 1 hour = 60 minutes = 3,600 seconds
- • 1 day = 24 hours = 86,400 seconds
- • 1 week = 7 days
- • 1 year ≈ 365.25 days
Time Arithmetic
Time arithmetic involves adding or subtracting time durations while properly handling carries and borrows between different time units.
Key Concepts
- • Handle overflow: 90 seconds = 1 min 30 sec
- • Negative results: borrowing from higher units
- • Precision: maintaining accuracy in calculations
- • Rounding: appropriate precision for results
Common Time Calculations
Duration Calculation
Calculate the time difference between two specific moments or timestamps.
Time Addition
Add time durations to find total time or calculate future times.
Unit Conversion
Convert between different time units like hours to minutes or days to seconds.
Timestamp Conversion
Convert Unix timestamps to human-readable dates and vice versa.
Time Zone Conversion
Convert times between different time zones accounting for daylight saving.
Business Time
Calculate working hours excluding weekends and holidays.
Applications
- • Project time tracking
- • Payroll and billing calculations
- • Event scheduling and planning
- • Performance measurement
- • Scientific timing measurements
- • Athletic event timing
Time Formats
- • HH:MM:SS (24-hour format)
- • HH:MM AM/PM (12-hour format)
- • Unix timestamp (seconds since 1970)
- • ISO 8601: YYYY-MM-DDTHH:MM:SS
- • Decimal hours (1.5 hours = 1:30)
Precision Considerations
- • Floating-point precision limits
- • Leap seconds in precise timing
- • Time zone and DST changes
- • Calendar system variations
- • Measurement uncertainty
Related Calculators
Date Calculator
Calculate date differences and perform date arithmetic
Percentage Calculator
Calculate percentages, increases, and decreases
Unit Converter
Convert between various units of measurement