Mulch Calculator
Beautify your garden with the right amount of mulch. Calculate cubic yards and bags needed for any bed size.
Formula:
Volume = Area × Depth
Standard depth is 2-3 inches
Estimated Materials
Volume
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2 cu ft Bags
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Mathematical Principles
Mulch calculation is a simple volume problem. We calculate the area of the bed and multiply it by the desired depth.
1. Area Formulas
- Rectangle: Area = Length × Width
- Circle: Area = π × (Diameter / 2)²
2. Volume Calculation
Multiply the area (sq ft) by the depth (ft). Remember to convert inches to feet first!Volume (ft³) = Area (ft²) × (Depth (in) / 12)
3. Bag Conversion
To find the number of bags, divide the total cubic feet by the bag size:Bags = Volume (ft³) / Bag Size (ft³)
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Frequently Asked Questions
A depth of 2-3 inches is standard for most garden beds. This suppresses weeds and retains moisture without suffocating plant roots.
Tips
- Enter the dimensions in the same unit for consistency.
- Results update automatically as you type.
- Use the unit selector to convert between different measurement systems.
Need Help?
Check out our guide on how to use this calculator properly and understand the concepts behind it.
Mulch calculation guide