Bulk Mulch Calculator — Cubic Yards
Convert planting-bed dimensions and target depth into a bulk cubic-yard delivery quantity; package counts remain a secondary comparison.
Compare up to three scenarios
Capture the current result, change one or more inputs, and see the options side by side. The first option becomes your baseline.
Your live calculator remains unchanged. Capture it only when you want a comparison point.
Save this estimate as a project section
Name rooms, roof planes, yard areas or other sections separately. CalcurHome will combine compatible results from this calculator on this device.
No account or personal information required. Data remains in this browser until you delete it or clear browser storage.
View all saved project estimatesWhat does the mulch calculator calculate?
Bulk mulch volume comes from bed area times depth, converted from cubic feet to cubic yards, with allowance for settling and irregular edges. This page owns cubic-yard and delivery intent; bag equivalents are comparisons. Use the Mulch Bag Calculator when shopping by a package’s labeled volume.
Mulch cubic-yard formula
Bed area becomes volume when multiplied by depth in feet. Dividing by 27 creates the bulk-delivery quantity; displayed bag equivalents only compare that same waste-adjusted volume with retail packages.
How to measure for an accurate estimate
- Measure planting beds inside edging and divide curved borders into short average-width sections.
- Subtract broad areas occupied by patios, dense groundcover, ponds, or other non-mulched surfaces.
- Check existing mulch depth in several places and enter only the additional depth required.
- Calculate islands separately, then add the results before applying any supplier delivery minimum.
Front foundation bed
A 30 ft by 6 ft bed receives 3 in of mulch plus 10% for settling and waste.
The estimate is 49.5 ft³, or 1.83 yd³, equal to 25 two-ft³ bags or 17 three-ft³ bags.Before you purchase material
- Compare delivered bulk mulch with total bag cost at the calculator’s equivalent volumes.
- Inspect mulch composition and aging; color alone does not establish product suitability.
- Avoid piling mulch against tree trunks, plant crowns, siding, or drainage openings.
- Schedule delivery on a surface that can hold the pile without staining or blocking runoff.
Common questions
How much volume is in one cubic yard of mulch?
One cubic yard contains 27 cubic feet. For comparison, that equals 13.5 two-cubic-foot packages or nine three-cubic-foot packages before waste. Use the dedicated Mulch Bag Calculator to round a measured project into the exact retail package size.
How deep should mulch be?
Depth depends on mulch type, plant needs, soil conditions, and existing material. A moderate layer can suppress weeds and reduce evaporation, while excessive depth may retain unwanted moisture or bury crowns. Follow local extension and plant-specific guidance for the selected mulch.
Should old mulch be removed before adding more?
Not automatically. Measure what remains and inspect for matting, contamination, disease concerns, or excessive buildup. Often the existing layer can be loosened and topped up only enough to restore the desired depth. Keep total accumulated depth within horticultural guidance.
Does mulch settle after installation?
Yes. Particle size, moisture, handling, and decomposition can reduce apparent depth. The default 10% allowance helps with settling and minor placement losses, but it is not exact. Ask the supplier about expected yield and avoid compensating with an excessively deep layer.
Sources and reference standards
- U.S. EPA WaterSense — Landscaping TipsFederal recommendations for water-efficient landscape planning and soil preparation.
- National Institute of Standards and Technology — SI Units: VolumeFederal reference for volume units and unit relationships.
See every citation and the calculators that use it in the calculator source index.
Use this result in a complete project plan
Pond liner planning guide
A pond liner must cross the deepest contour and still reach beyond every finished edge, so surface area alone cannot size it. Shelves, streams, islands, penetrations, edge details, substrate, underlayment, stock dimensions and seam rules can all change the purchase. This guide creates a traceable envelope and keeps surrounding stone or mulch separate from the watertight system.
Did this calculator help you make the next project decision?