Concrete Calculator

Q: Are results stored?

No. All calculations run in your browser. No data is sent to any server.

Calculate the exact volume and materials needed for any concrete pour — slab, column, or staircase.

Instant result Runs in browser

Length (m)

Width (m)

Height / Thickness (m)

Diameter (m)

Height / Thickness (m)

Number of steps

Step width (m)

Riser height (m)

Tread depth (m)

Concrete grade

Waste factor (%)

Cement bag size

Mix ratios per m³

            C10/B150 — 250 kg + 870 kg + 1100 kg + 175 L

            C16/B200 — 300 kg + 820 kg + 1100 kg + 180 L

            C20/B250 — 350 kg + 760 kg + 1060 kg + 185 L

            C25/B300 — 400 kg + 700 kg + 1020 kg + 190 L

            C30/B350 — 450 kg + 650 kg + 970 kg + 195 L

            C35/B400 — 500 kg + 600 kg + 920 kg + 200 L

Cement + Sand + Gravel + Water per m³

How to use?

1
Choose shapeSelect the shape that matches your construction element.
2
Enter dimensionsInput length, width, and height (or diameter for cylinders).
3
Read the resultsGet volume and required materials including cement bags.

FAQ

Which concrete grade should I use?

C20/B250 is suitable for most residential slabs and foundations. C25/B300 or higher for structural elements.

Why add a waste factor?

Concrete is lost during mixing, pouring, and spills. A 10% surplus is recommended for most projects.