For Mathematical Calculations use Online Scientific Calculator
If you use windows calculator very often then you must’ve knew that windows default calculator is not that advance and is only capable of limited calculations. Today I am reviewing an online tool which is Ecalc Online Scientific Calculator and capable of most advance calculations and its not only a calculator it will also fulfill your unit conversion needs.
Ecalc OSC is an online web tool which can perform normal calculations and advanced mathematical calculations as well as it can perform conversions in many units. There are two versions available you can use it online or you can download it on your computer and use it offline any time.
Ecalc OSC is very advance and has very vast features if you are looking for calculator substitutes then you should give this free tool a try.