Mulch Calculator (Yards & Bags)
Cubic yards/metres and 2 ft³ bags of mulch for beds at the depth that actually suppresses weeds.
Bulk beats bags above ~1 yd³ — a yard equals 13.5 bags and usually costs half as much. Keep mulch 75 mm clear of trunks and siding; 'mulch volcanoes' rot bark and invite termites.
Formula
Mulch Calculator (Yards & Bags) is a free mulch calculator for civil engineers, contractors and quantity surveyors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Mulch Calculator (Yards & Bags)
Cubic yards/metres and 2 ft³ bags of mulch for beds at the depth that actually suppresses weeds. The calculation implements V = area × depth; 1 yd³ = 13.5 bags of 2 ft³ (Extension-service landscaping guidance (3″ depth)). Bulk beats bags above ~1 yd³ — a yard equals 13.5 bags and usually costs half as much. Keep mulch 75 mm clear of trunks and siding; 'mulch volcanoes' rot bark and invite termites.
How to use Mulch Calculator (Yards & Bags)
- 1Enter Bed area in m².
- 2Enter Depth in mm (75 mm (3″) suppresses weeds; 50 mm refresh).
- 3Read Cubic yards, Volume, 2 ft³ bags instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Mulch Calculator (Yards & Bags)?
- ✓Implements the standard formula — V = area × depth; 1 yd³ = 13.5 bags of 2 ft³
- ✓Reference cited on-page: Extension-service landscaping guidance (3″ depth)
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Mulch Calculator (Yards & Bags) use?+
It computes V = area × depth; 1 yd³ = 13.5 bags of 2 ft³, per Extension-service landscaping guidance (3″ depth). The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Bulk beats bags above ~1 yd³ — a yard equals 13.5 bags and usually costs half as much. Keep mulch 75 mm clear of trunks and siding; 'mulch volcanoes' rot bark and invite termites.
Does it include wastage?+
Yes — standard wastage/bulking factors are built in and stated in the formula line, so the quantity is an orderable number, not a bare geometric volume.
Is the Mulch Calculator (Yards & Bags) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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