How much paint do I need for a room? By the Plankley team · Last checked 19 October 2026 On this pageMeasuringDoors and windowsCoats and real coverageTins and leftoversFAQs Measuring Doors and windows Coats and real coverage Tins and leftovers FAQs Related pagesDecorating guidesPainting new plaster: mist coats and how much paintHow many rolls of wallpaper do i need