TimeMaths is a free online tool to compute time. It is built like a calculator for your convenience, but can also be use to calculate complex formulas. It understands many time units, additions, substractions, multiplications, divisions, parentheses and even exponents.
If you want to do some mathematical operations that incorporate time, TimeMaths is the perfect free tool. You don't have to use Excel or try to do it by hand.
TimeMaths is built around an engine made on purpose for this tool. It allows you to calculate complex operations. TimeMaths is powerful, fast and easy to use.
You can use TimeMaths with the buttons of the calculator or you can use the input at the top. Then press Calculate or = and you should see the result! If the calculation is mathematically impossible, an error will show up.