Here is an online octane rating calculator which helps you in the calculation of minimum octane rating for your entered research octane number and motor octane number.

**Octane rating:** It is otherwise called as octane number. Performance of the engine or aviation fuel is measured using this number. Fuels with a higher octane number are used in the engines that need higher compression ratios. High-performance gasoline engines are the engines that need higher compression ratios.

Feel free to use our online **octane rating calculator** to make your octane number calculations easier. Manually you can calculate it by just dividing the sum of research octane number & motor octane number by the integer '2'.