It’s been time to paint the inside of the house. Linear measures, height by breadth give the area and from that you need to estimate the volume of paint. The realities of inexperience regarding surface absorption rates kicks in. One litre covered four square metres of a garden shed last year. One litre of varnish did two coats of a bench. One litre of undercoat will cover fifteen square metres inside the house.
Noticed on a walk across the South Downs in 2010.