Vollständige Anleitung für Betonrechner
Lange, Breite, Dicke: m3 und Sacke.
Examples
- 4×5m, 10 cm thick: volume 2.0 m³, with 10% 2.2 m³, ≈170 bags 25kg or 106 bags 40kg.
- 2×2m, 15 cm: 0.6 m³, 0.66 with waste → 51 bags 25kg.
⚠ Common mistakes
- Using cm directly without /100 — 10 cm is 0.10 m, not 10 m.
- No waste — always short on the last wheelbarrow.
Häufig Gestellte Fragen (FAQ) (2)
How much is a 25kg bag?
About 0.013 m³ concrete. 40kg ≈0.0208 m³. Check your mix; lightweight varies.
Need rebar?
Slabs over 10 cm or loads need mesh; volume stays same, cost rises.