Firewood calculator
Firewood is sold in three units, and the same figure gives you a different amount of wood each time. Convert both the volume and the price.
Volume conversion
Find out how much wood you are really buying when the offer uses a unit you are not familiar with.
- Loose cubic metre (logs tipped loosely)
- 4.00 prms
- Stacked cubic metre (logs neatly stacked)
- 3.00 prm
- Solid cubic metre (wood only, no gaps)
- 1.77 m³
Price conversion
One supplier offers loose firewood, another stacked. Convert the prices to the same unit.
- Loose cubic metre (logs tipped loosely)
- 80 € / prms
- Stacked cubic metre (logs neatly stacked)
- 107 € / prm
- Solid cubic metre (wood only, no gaps)
- 181 € / m³
The conversion is based on the ratios 1 prms = 0.75 prm and 1 prm = 0.59 m³. These are commonly used values; the actual ratio depends on the length and shape of the logs.
Firewood and pricesFrequently asked questions
How much is one loose cubic metre of firewood once it is stacked?
One loose cubic metre (prms) corresponds to 0.75 of a stacked cubic metre (prm) once the logs are stacked.
How many solid cubic metres of wood are there in one stacked cubic metre?
One stacked cubic metre (prm) corresponds to approximately 0.59 of a solid cubic metre of wood (m³). The rest is the gaps between the logs.
How do I compare the price of loose and stacked firewood?
Divide the price per loose cubic metre by 0.75. The result is the price per stacked cubic metre, which you can then compare with another supplier’s offer.