You can use this graph to change between gallons and litres.

Change 10 gallons to litres.
Change 225 litres to gallons.
Practise OCR GCSE Maths Conversions and Units with exam-style questions for Foundation and Higher tier. 33 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.