Time Calculators
Free time calculators: add and subtract hours and minutes, find the time in a number of hours, count hours between two times and compare time zones.
3 Calculators
All Time Calculators
Time Calculators Explained
Time does not work in tens, which is why sums with hours and minutes are easy to get wrong. Sixty seconds make a minute, sixty minutes make an hour and twenty-four hours make a day. Our time calculators carry over for you, so you can add up tasks, work out a shift with a break, or see what time it will be in a number of hours. The Hours and Time calculators work on the clock as you read it, and they do not add or remove the hour when the clocks change.
The Time Zone Converter is different: it changes a date and time from one place to another and includes daylight saving changes, so you can plan a call between London, New York and Sydney without working out the offsets yourself.
Popular time calculators include Hours Calculator, Time Calculator and Time Zone Converter.
Frequently Asked Questions
Are the time calculators free to use?
Yes. Every time calculator is free, with no signup. The calculations happen in your browser, and the times you enter are not stored or sent to a server.
Do they allow for daylight saving time?
The Time Zone Converter does, so the time difference between two cities is right for the date you choose. The Hours Calculator and Time Calculator work on the clock as you read it, so they do not add or remove the hour when the clocks go forward or back. If your period crosses that day, the real elapsed time can differ by one hour.
How do I convert a time between time zones?
Use the Time Zone Converter. Enter the date and time, choose the place you are starting from and the place you want, and it shows the local time there, the time difference and the same moment in other big cities.
Which calculator should I use for what time it will be in 8 hours?
Use the Hours Calculator. It adds hours, minutes or days to the current time or to any date and time you choose, and it can also find the hours between two times. Use the Time Calculator when you want to add or subtract lengths of time, such as 5 hours 45 minutes plus 3 hours 20 minutes.
How do I change minutes into decimal hours?
Divide the minutes by 60. So 15 minutes is 0.25 hours, 30 minutes is 0.5 hours and 45 minutes is 0.75 hours. The Hours and Time calculators show the answer in decimal hours as well, which is handy for timesheets and invoices.
