Mulch & Soil Calculator
Estimate exactly how much mulch or soil you need for your project.
Standard mulch depth is 2-3 inches.
Total Volume Needed
OR 0 cubic feet
Mulch Calculator โ Buy Exactly What You Need
Enter the length, width and desired depth of your bed, and this free mulch calculator converts it into cubic yards for bulk orders plus cubic feet โ and tells you exactly how many 2 cu ft or 3 cu ft bags that means at the store.
The standard mulch depth of 3 inches is pre-filled, so most garden beds need just two more numbers. All math runs instantly in your browser โ no signup, no uploads.
Yards, feet and bags in one view
See total volume in cubic yards (for bulk delivery) and cubic feet, plus the exact number of standard 2 cu ft and large 3 cu ft bags to buy.
Depth guidance built in
The depth field defaults to 3 inches โ the sweet spot for weed suppression without suffocating roots โ and you can adjust it freely.
Avoid overbuying
Mulch is priced by the yard or the bag, and guessing wastes money. Enter your measurements once and shop with the exact number.
How to use
- Enter the bed length and width in feet.
- Set the mulch depth in inches (3 is standard).
- Click Calculate.
- Read off cubic yards for bulk orders or bag counts for the garden center.
Frequently Asked Questions
How deep should mulch be?
2 to 3 inches is ideal for most beds. Under 2 inches weeds push through; over 4 inches can suffocate roots and block water.
How much area does one bag of mulch cover?
A 2 cubic foot bag covers about 12 square feet at 2-inch depth; a 3 cubic foot bag covers about 18 square feet.
What is the difference between mulch and soil?
Soil is the growing medium plants live in. Mulch is a protective layer spread on top of soil to retain moisture, suppress weeds and regulate temperature.
Should I remove old mulch first?
Usually not โ organic mulch breaks down and feeds the soil. Just fluff it and top up. Remove it only if it is diseased or has formed a hard crust.
Can I use fresh wood chips as mulch?
Fresh chips can temporarily tie up nitrogen as they decompose. Age them a few months for delicate annuals; they are fine immediately around established trees and shrubs.
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