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Project Planning

Hempcrete Calculator

Enter your wall dimensions to instantly calculate how much hemp shiv and lime binder you need, in kilograms and standard 25 kg bags.

Used to show matching suppliers in your results.

Hempcrete Calculator

Enter your wall dimensions to get hemp shiv and lime binder quantities.

Total surface area of hempcrete walls, excluding windows and doors.

Typical range: 150 mm (insulation) to 450 mm (structural). 300 mm is a common wall thickness.

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Your results will appear here

Fill in the form and click Calculate Materials.

Mix ratio

Standard hempcrete uses approximately 1 part lime binder to 2 parts hemp shiv by volume, mixed with water.

Wall thickness guide

150–200 mm for insulation top-up, 300–350 mm for walls, 450 mm+ for passive-house standard walls.

Material sourcing

Use our Supplier Directory to find verified hemp shiv and lime binder suppliers in your country.