Free calculators and interactive tools from The Wood Burner.
Free flue liner size calculator: enter your stove's fuel type and outlet size to get the recommended liner diameter in mm and inches, plus how many metres of flexible liner to order from your chimney height.
Read guideFree converter for UK firewood: turn a cubic metre, dumpy bag, net or barrow load into every other unit, and see the loose vs stacked difference before you pay.
Read guideEnter your stove size and get the hearth width, depth and thickness Building Regs ask for: 150mm each side, 225mm in front, 840 x 840mm minimum overall.
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Free firewood calculator: work out how much firewood you need for the winter in cubic metres and bulk bags from how often you burn and how hard you run the stove.
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Compare firewood prices fairly: this calculator turns bulk bags, crates, nets and loose loads into a single firewood price per cubic metre so you can see which deal is truly cheapest.
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Free log store size calculator: find out what size log store you need to hold your firewood, allowing for stacking gaps, or check whether a store you are buying will fit a season of logs.
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Work out how long to season firewood: this calculator estimates the months your logs need to dry to under 20% moisture by species, split size and how they are stored.
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Free stove size calculator: enter your room dimensions, insulation and glazing to get the right wood burning stove heat output in kW, with a warning if a stove is oversized.
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Free wood burner running cost calculator: turn what you pay for firewood into a real cost per useful kWh of heat, an evening's cost and a winter total, then compare it against mains gas, electric and oil heating.
Read guideFree wood burner air vent calculator: enter your stove's kW rating and how airtight your home is to get the free air area (in mm) and equivalent vent size your installation needs under Approved Document J.
Read guideFree firewood heat comparison calculator: pick a wood species and see the heat it gives off per stacked cubic metre, ranked against ash, oak, birch, pine and more, so you know which logs are best to burn.
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