Mulch Calculator

Mulch calculator

Find how much landscape mulch a bed needs, then how many bags to buy.

Bed size
Units

0 to 20000 feet. Up to 6 decimal places.

0 to 20000 feet. Up to 6 decimal places.

Depth

Presets are exactly 2 inches and 3 inches. Custom depth is 0 to 12 inches, up to 6 decimal places.

These presets are common landscape depths. They are not a playground fall-protection rating. Zero depth is allowed and gives zero volume.

Optional. Use 0 to add nothing. The maximum is 25. A value of 10 adds 10% once to the geometric volume and is not added again when bags are counted.

Volume bags

2 and 3 cubic foot bags are common retail sizes. Custom is the volume printed on your bag, in the unit you choose. Greater than 0 and at most 10000, with up to 12 decimal places. A weight on a rubber bag is not entered here.

Material

Switching material does not change the cubic volume. The allowance is still applied once.

Organic density is not estimated. Bark, chips, and leaves vary with the wood, the moisture, and the packing. Rubber can show an optional weight. That weight never changes the volume or the bags.

The bag count will appear here after you calculate.

How the volume and bags are worked out

Volume is the area times the depth. A rectangle uses length times width. Results are cubic yards, cubic feet, and cubic metres.

Bag count divides that volume by the bag volume and rounds up to a whole bag. An exact fit stays put. Zero volume is 0 bags. Allowance, if you type one, is added once.

The 2 inch and 3 inch choices are common bed depths, not a playground rating. Sources and the rubber-weight example are on the FAQ.

Planning another part of your project?

Concrete calculator