A log store has to hold your wood and let air move through it, so its internal volume is always bigger than the solid wood inside. This calculator sizes the store you need for a given amount of firewood, or checks whether a store you are eyeing up is big enough. The catch most people miss: stacked logs are roughly one third air gaps.

Size your log store

Stacked cubic metres of solid wood you want to keep.
Front to back. Roughly one log length, often 0.4 to 0.6m.
How high you will stack inside, often 0.9 to 1.5m.

How the maths works: neatly hand-stacked split logs occupy about 1.5 times the volume of the solid wood, because of the gaps between them. So a store needs roughly 1.5 cubic metres of internal space for every cubic metre of solid firewood you want to keep. We use that 1.5 factor throughout, and we assume you fill the store fully. Leave the bottom off the ground on bearers and the back open for airflow so the wood keeps drying rather than going mouldy.