Time Calculator
Add or subtract time values in hours, minutes, and seconds.
Time Addition & Subtraction
Add or Subtract Time from a Date
Time Calculator in Expression
Loading...
Add, Subtract, and Calculate Time Durations
Our Time Calculator provides a flexible way to perform arithmetic on time values, add or subtract durations from a specific date, and compute complex time-based expressions.
What is a Time Calculator?
A Time Calculator is a versatile tool designed to handle various calculations involving time. Unlike a standard calculator, it understands units like days, hours, minutes, and seconds. It can perform arithmetic (addition and subtraction) on time durations, add or subtract a block of time from a specific start date, and even parse and compute complex time expressions, making it invaluable for project planning, scheduling, and logging work hours.
How It Works: Calculating with Time
The calculator first converts all time inputs into a base unit (seconds) to perform calculations accurately.
- Time Addition/Subtraction: Converts both time values to seconds, performs the operation, and then converts the result back into days, hours, minutes, and seconds.
- Date Math: Converts the duration to seconds and adds or subtracts it from the start date's timestamp to find the new date and time.
- Expression Calculator: Parses expressions like "1d 5h + 30m" by converting each part to seconds, summing them up, and then displaying the result in various formats.
Frequently Asked Questions
How do you calculate time duration?
To calculate the duration between two times, you convert both times into a common unit, such as seconds, subtract the start time from the end time, and then convert the result back into hours, minutes, and seconds. Our calculator can do this automatically.
How do you add hours and minutes?
To add time, you add the minutes and seconds separately. If the seconds total is 60 or more, you carry over the extra minutes. If the minutes total is 60 or more, you carry over the extra hours. The Time Calculator handles this automatically for complex additions and subtractions.
How many hours is 9am to 5pm?
From 9:00 AM to 5:00 PM is exactly 8 hours.
Practical Uses
- Project Management: Sum up the time spent on various tasks to get a total project duration.
- Event Planning: Calculate the exact start or end time of an event by adding a duration to a start date.
- Logistics & Travel: Add travel time, layovers, and other durations to determine your total journey time.
- Time Tracking: Easily add up hours and minutes from a timesheet to calculate total work time.
Advertisement Placeholder