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Mulch Calculator
Estimate mulch needed for a landscape area. Change the inputs below and the estimate updates immediately.
Input
Your numbers
Calculated result
Mulch needed
1.85 yd³
2 cu ft bags
25 bags
Estimate only. Verify important decisions with an appropriate professional or official source.
How to use it
A quick estimate, without the spreadsheet.
Inputs and units
Enter rectangular bed length and width in feet and mulch depth in inches.
Formula
Cubic yards = length × width × depth / 324; two-cubic-foot bags = round up(cubic yards × 27 / 2).
Worked example
A 12 × 9 foot bed at 3 inches deep needs one cubic yard or fourteen two-cubic-foot bags.
Assumptions and limitations
Assumes uniform coverage and the specified bag volume. Divide irregular beds into rectangles and add their volumes; settling and waste are excluded.