DIY

How Much Mulch Do You Need?

Built by Kevin Glover · @gloverbuilds · Verified formula

Calculate cubic yards and bags of mulch for garden beds. Enter bed dimensions and desired depth for exact quantities.

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

In this article

Mulch Coverage Formula
Bulk vs Bags

Le Calcul

Volume = surface (m²) × épaisseur (m). Pour 50 m² à 7 cm : 50 × 0,07 = 3,5 m³. Épaisseur idéale : 5-7 cm. Plus de 10 cm étouffe les racines. En vrac : 30-50 €/m³. En sacs : 80-120 €/m³. Le vrac est toujours plus économique pour les grandes surfaces.

Types

Écorce de pin : 25-40 €/m³, dure 1-2 ans. BRF : 15-30 €, excellent pour le sol. Paillis minéral (graviers) : 50-80 €, permanent. Paille : 3-5 €/balle, 1 saison.

⚡ CalcWolf Insight

Mulch calculator searches spike March-May as homeowners start spring landscaping. The audience has immediate purchase intent — they need mulch this weekend. Garden center and landscaping supply advertisers pay $3-8 CPC for these searches.

Frequently asked questions

Combien pour 30 m² ?▾

À 7 cm : 2,1 m³. En vrac : 65-105 €. En sacs : 170-250 €.

À quelle fréquence renouveler ?▾

Annuellement pour l'organique. Ajoutez 3-5 cm au printemps. Le minéral est permanent.

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Kevin Glover · @gloverbuilds

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 →