Tell us how you actually burn and we will estimate the firewood you need for the season, in cubic metres (loose stacked) and in bulk bags. The thing nobody mentions: a "bulk bag" is sold loose-filled and holds far less solid wood than a stacked cubic metre, which is why people run short.
How much firewood will you burn this winter?
Sets the base burn rate per week.
A typical UK season is roughly 20 to 26 weeks (October to April).
Bigger fireboxes eat more wood per hour.
Softwood burns faster, so you need more volume for the same heat.
The figures below are loose-stacked cubic metres, the way firewood is normally measured and sold in the UK. A standard builder's bulk bag is filled loosely and settles to roughly 0.6 to 0.7 of a stacked cubic metre of actual wood, so we have allowed for that. Always buy on volume and moisture, never on weight, because wet wood weighs more but heats less.