Time Calculator | Add, Subtract & Calculate Time Differences

Enter your base time in the "Base Time" section using hours, minutes, and seconds fields. Then enter the amount of time you want to add in the "Time to Add" section. The result will be calculated automatically and displayed below. The calculator handles overflow correctly - for example, adding 2 hours to 23:00 will give you 01:00 (the next day).

Yes! The calculator automatically handles negative results by wrapping around the 24-hour clock. For example, subtracting 2 hours from 01:00 will give you 23:00 (previous day). This makes it easy to work with time calculations across day boundaries.

Enter a start time and an end time in the "Calculate Time Difference" section. The calculator will automatically compute the duration between these two times and display it in hours, minutes, and seconds. If the end time is earlier than the start time, the calculator assumes the end time is on the next day and calculates accordingly.

The 24-hour format (also called military time) uses hours from 0 to 23, while the 12-hour format uses hours from 1 to 12 with AM/PM designations. For example, 14:30 in 24-hour format is 2:30 PM in 12-hour format. Our converter helps you easily switch between these formats.

Absolutely! The time difference calculator is perfect for calculating work hours. Enter your start time (e.g., 09:00) and end time (e.g., 17:30) to see the total hours worked. You can also use the add/subtract feature to calculate break times or overtime hours.

Use the "Convert Time Format" section. Enter the time in 24-hour format (military time) in the input fields, then select "12-Hour" as the output format. The calculator will instantly show you the equivalent time in AM/PM format. For example, 13:45 becomes 1:45 PM.

Yes! All features of the time calculator work with hours, minutes, AND seconds. You can perform precise calculations down to the second, whether you're adding time, subtracting time, or calculating differences. This is useful for timing events, sports, cooking, and scientific applications.

The calculator automatically wraps the result back to a valid time within the 24-hour cycle. For example, if you add 25 hours to 12:00, the result will be 13:00 (1:00 PM the next day). This automatic wraparound makes it easy to work with time calculations that span multiple days.

Yes! This tool is perfect for cooking and baking calculations. If a recipe says to cook for 2 hours and 45 minutes starting at 14:30, just enter that as your base time and add 2 hours 45 minutes to see when your dish will be ready (17:15). You can also calculate prep time, resting time, and more.

The calculator is completely accurate down to the second. It uses precise mathematical calculations and handles all edge cases correctly, including midnight wraparound, leap seconds are not considered (as they are rare and typically not relevant for everyday calculations), and time format conversions. You can rely on it for any time-sensitive calculations.

While this tool doesn't automatically handle time zones, you can use it to calculate time differences between zones. For example, if you know New York is 6 hours behind London, you can subtract 6 hours from a London time to get the New York time. However, for automatic time zone conversions, check out our other time-related tools designed specifically for that purpose.

The "Use Current Time" button automatically fills in the base time with your current system time. This is convenient when you want to calculate a future time (like "what time will it be in 2 hours?") or when working with the current moment as your starting point. Just click it and start adding or subtracting time from right now.