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How Much Mulch Do You Need?

Calculate cubic yards of mulch for your garden beds. Enter dimensions and depth — get the exact amount and bag count.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

Die Berechnung

Volumen = Fläche (m²) × Dicke (m). 30 m² bei 7 cm: 30 × 0,07 = 2,1 m³. Ideale Dicke: 5-7 cm. Über 10 cm erstickt Wurzeln. Rindenmulch im Baumarkt: 3-5 €/70-Liter-Sack. Lose: 20-35 €/m³ — deutlich günstiger bei größeren Mengen.

Arten

Kiefernrinde: der Standard in Deutschland. Holzhäcksel: günstiger, zersetzt sich schneller. Lavagranulat: permanent, gut für Steingärten. Pinienrinde: edler, teurer, langsamer Zerfall.

⚡ CalcWolf Insight

The #1 mulching mistake: "volcano mulching" — piling mulch high around tree trunks. This traps moisture against the bark, causes rot, and can kill the tree. Keep a 3-inch gap between mulch and any trunk or stem.

Frequently asked questions
Wie viel für 20 m²?
Bei 7 cm: 1,4 m³. Lose: ~35-50 €. In Säcken: ~100-140 €.
Wie oft erneuern?
Jährlich 3-5 cm nachfüllen. Lavagranulat ist permanent.
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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