Soil Calculator: Raised Bed Volume, Liters and Bags

Calculate your quantities

Enter your measurements below. Change the example allowance, product information and price to match your project.

Enter measurements and select Calculate.

Prices use your chosen currency. A zero price leaves cost at zero. Material estimates exclude labor, tax, delivery and accessories. Enter decimal feet, not feet-and-inches notation. Decimal point or comma accepted; omit thousands separators.

How to use this soil calculator

Use internal bed dimensions and the depth of new soil needed, rather than total wall height when the bed is partly filled. Settling depends on the actual product; this calculator applies only your chosen allowance.

Measure the relevant area or volume using the units shown beside each input.
Replace example product values with the supplier's yield, coverage, density or pack quantity where applicable.
Set the extra allowance explicitly. Enter zero when you want the geometric quantity without an allowance.
Select Calculate, then compare the unrounded purchasing basis with whole bags, boxes or packs where displayed.

Formula

ft³ = inside length × inside width × fill depth / 12. Order volume = ft³ × (1 + allowance / 100). Liters = ft³ × 28.316846592. Bags = liters / bag liters, rounded up.

Worked example

A 10 × 10 ft bed filled 12 in deep needs 100 ft³ = 2,831.685 liters. With no allowance and 40-liter bags, round up to 71 bags.

Six calculated examples

Only the first length changes in this table. All other inputs use the calculator's reset values shown above. These are mathematical scenarios, not measured supplier quotes.

soil quantity examples
First length	Calculated quantities
5 ft	Geometric volume (ft³): 50; Order volume (ft³): 50; Order volume (yd³): 1.852; Order volume (m³): 1.416; Bags: 36; Liters: 1415.842
8 ft	Geometric volume (ft³): 80; Order volume (ft³): 80; Order volume (yd³): 2.963; Order volume (m³): 2.265; Bags: 57; Liters: 2265.348
10 ft	Geometric volume (ft³): 100; Order volume (ft³): 100; Order volume (yd³): 3.704; Order volume (m³): 2.832; Bags: 71; Liters: 2831.685
12 ft	Geometric volume (ft³): 120; Order volume (ft³): 120; Order volume (yd³): 4.444; Order volume (m³): 3.398; Bags: 85; Liters: 3398.022
15 ft	Geometric volume (ft³): 150; Order volume (ft³): 150; Order volume (yd³): 5.556; Order volume (m³): 4.248; Bags: 107; Liters: 4247.527
20 ft	Geometric volume (ft³): 200; Order volume (ft³): 200; Order volume (yd³): 7.407; Order volume (m³): 5.663; Bags: 142; Liters: 5663.369

Frequently asked questions

Does this tell me which soil to buy?

No. It estimates volume; choose a suitable growing medium separately.

Can I enter a partially filled bed?

Yes. Enter only the remaining depth you want to fill.

Are liters a weight unit?

No. Liters measure volume. A weight estimate needs the actual bulk density.

Units and calculation limits

One foot is 0.3048 meters; one cubic yard is 27 cubic feet. Calculations retain precision until display; whole-package quantities are rounded up. Outputs estimate quantities from your measurements and assumptions. Confirm product coverage and units before ordering.