# Quick Answer: How Do I Calculate Raised Bed Soil?

To calculate:

1. Measure the length, width and height of your bed. (Unless the boards are very thick, don’t worry about inside/outside measurements.)
2. Multiply all the measurements together: 6 x 3 x 1.4 = 25.2 cubic feet.
3. Divide the answer by 27 to get the number of cubic yards.

## How do I calculate how much soil I need?

Length in feet x Width in feet x Depth in feet (inches divided by 12). Take the total and divide by 27 (the amount of cubic feet in a yard). The final figure will be the estimated amount of cubic yards required.

## How many inches of soil do I need for a raised garden bed?

Eight to 12 inches is usually adequate. If drainage is a problem, or if the plants you are growing prefer drier soil, the bed could be taller and filled with a porous growing medium. Vegetable beds should be 12 to 18 inches deep. The material used to edge a raised bed should be stable, durable and attractive.

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## How do you measure the cubic feet of a raised bed?

Multiply the length by the width by the depth. All the units of measurements must be in feet. For example, a raised garden bed that is 4 feet by 3 feet by 1.5 feet equals 18 cubic feet.

## How much dirt do I need for a 4×4 raised bed?

Determine the volume of your planter box by multiplying the width by the length by the depth. For example, if you have a length of 5 feet, a width of 4 feet and a depth of 2 feet, the volume would be 40 cubic feet (5 x 4 x 2 = 40). This is the amount of dirt you will need to fill your raised planter box.

## What is the best mix of soil for raised beds?

For most situations, we recommend these proportions: 60% topsoil. 30% compost. 10% Potting soil (a soilless growing mix that contains peat moss, perlite and/or vermiculite)

## What is the best height for raised garden beds?

The most popular height for raised beds is 11″. (This is the height of two standard “2 x 6″ boards, which actually measure 1.5″ x 5.5”.) This height provides sufficient drainage for most crops. For best results, there should be another 12″ or more of good soil below the bed.

## How many inches of soil do tomatoes need?

To provide adequate room for root growth, till the soil to a depth of at least 8 to 12 inches. Amend heavy soils with compost or manure to improve the texture and drainage. Grow tomatoes in containers that hold at least 5 gallons of potting soil to allow adequate room for the roots.

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## How do you fill a raised garden bed for cheap?

Put down a few layers of cardboard to kill any weeds or grass. Then, fill the core of your raised bed. The best option for this is to use straw bales, but you can also use leaves, grass clippings, or old twigs. You can mix together a few of those options if you choose, too.

## How do you calculate cubic soil?

Ready to purchase soil?

1. Measure in inches the length, width and height of the bed or planter box. Write those numbers down.
2. Convert all dimensions into feet by dividing each number by 12.
3. Find the cubic feet by multiplying Width x Length x Height.
4. Write down your total cubic feet and head to the store to get your soil.

## How do I calculate cubic feet of soil?

How to Calculate Cubic Feet for Soil

1. Use a measuring tape to determine the length of the location where you will be placing the soil.
2. Measure the width in feet.
3. Determine the necessary depth of the soil in feet.
4. Multiply the width by the length by the depth to find the number of cubic feet of soil you need.

## How much is 75 cubic feet soil?

A 40 pound bag of topsoil usually contains about. 75 Cubic Feet of soil. There are 25.71404638 Dry Quarts in a Cubic Foot, so a 25 quart bag of potting soil would equal approximately 1 Cubic Foot.

## How do you calculate soil for a planter?

In short, you multiply the diameter by the diameter and then you multiply this by the height. You then divide this by 1800.

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## How many bags of soil do I need for 12 cubic feet?

If you are buying soil that is sold by the quart then first change cubic feet to quarts by multiplying it by 25.75. Then divide it by the number of quarts in the bag. In this example, the reader needs 12 cubic feet or 309 quarts. If he is buying 8 quart bags then he will need 39 bags (309/8 = 38.6).

## What do you fill raised beds with?

What you will need to fill your raised garden bed:

• sticks, twigs, or wood stumps(organic matter)
• landcape fabric (we got ours from Home Depot)You can also use a layer of cardboard.
• gravel or rocks for drainage.
• grass clippings and/or straw. 