Garden Math: Calculating the Area and Depth of Your Garden - FineGardening (2025)

FAQs

Garden Math: Calculating the Area and Depth of Your Garden - FineGardening? ›

Multiply the length by the width by the depth to determine the cubic footage of the entire area. Divide that number in half (to account for the soil that is already there) to determine how much fill you will need.

If you're lucky enough to have a square or rectangular lawn, measuring its area is simplicity itself. Measure the width and the length, and multiply the two together. This gives you your area. Whether you measure in feet, yards or metres, you can use our Turf Calculator to do the calculation for you.

The minimum depth for raised beds is 20cm (8in) however some plants need 45-60cm (18-24in). Most root vegetables need around 60cm (24in) of soil depth to root deeply. If you plan to build on a hard surface make sure that a depth of at least 40cm (16in) is allowed for.

Multiply the length by the width to determine the square footage—or area—of a square or rectangle. Find the square footage by multiplying the length and width of the area in question. Make sure to keep your units the same (feet or inches).

Lot Depth: Lot depth is measured along an imaginary straight line drawn from the midpoint of the front property line of the lot to the midpoint of the rear property line or to the most distant point on any other lot line where there is no rear lot line.

Measure the width and the length and multiply the two together. This gives you your area.

D = V Times 1/2 T D = Depth (in meters) T= Time (in seconds) V = 1507 m/s (speed of sound in water) Calculate the depth foe each of the times given below, using the formula above.

The basic formula for calculating area is Length times Width (LxW). If you are estimating the area for a rectangle you'll always use LxW. If you are calculating the area for a square you can multiply the length of one Side times itself, or (S²). The illustration above shows a room 12′ wide by 20′ long.

How to calculate square feet for landscaping? ›

If your yard is rectangular or square, measure the length and width and multiply them together (length X width = square footage). For example, if your yard has a length of 10 feet and a width of 8 feet, you would multiply 10 by 8 to get 80 square feet.

Particularly for small-seeded crops like forage legumes or wild-type grasses, planting too deep is a common cause for stand establishment failure. As a general rule, proper seeding depth is typically three times the maximum seed width.

You do not need to till or break up the soil very deep; less than 12 inches is better. Tilling too often or deep can do more damage than good to your soil.

Keep in mind that beds 18 inches deep or more will have better drainage than shorter beds. While most plants don't need anything deeper than 18 inches, I prefer beds that are two feet deep (24 inches). The extra height is mostly just for the ease and convenience of the gardener.

The height, or depth, of the box is measured from the top down to the base. If the box is closed, you'll measure the outside. If it's open, you can also opt to measure from the inside, going from the top edge down to the bottom.

The formula for finding depth when volume is given is: Depth = Volume / Area.