How do I calculate the square footage of my yard?

For a rectangle, multiply length by width. For an irregular yard, divide it into rectangles and triangles you can measure separately, calculate each area (rectangle = length x width; triangle = one-half base x height), and add the results. That total, in square feet, is what you use to buy the right amount of mulch, soil, seed, and plants.

How much mulch or soil do I need for my yard?

Mulch and soil are sold by the cubic yard or cubic foot, so you need area and depth. As a rule of thumb, one cubic yard covers about 100 square feet at 3 inches deep, or roughly 160 square feet at 2 inches deep. Multiply your bed's square footage by your chosen depth (in feet) to get cubic feet, then divide by 27 to get cubic yards. Measuring first is what stops you from over- or under-ordering.

Do I need special tools to measure my yard?

No. A basic tape measure works for small areas; a measuring wheel is faster for larger ones; and many phones can measure distances or let you draw a to-scale map. Whatever you use, the goal is the same: real dimensions instead of guesses, so plant counts, path widths, and material amounts are right the first time.

The 10-minute head start

How to measure your yard for a landscaping plan

This is the least glamorous step in the whole project and the one that saves you the most money. Ten minutes with a tape measure (or your phone) turns "I think that bed is about this big" into real numbers — and real numbers are what let you buy the right amount of mulch, the right number of plants, and a layout that actually fits. Skip it and you'll pay for the guess.

By the Yardable team · Apps 4 That LLC · Updated July 2026 · Practical, DIY

In one line: sketch the area, measure each edge, break odd shapes into rectangles and triangles, and add up the square footage — that one number drives every plant count, material order, and layout choice after it.

Step 1 — Sketch the area from above

Draw a rough bird's-eye outline of the space you're planning — the whole yard, or just the bed or patio. It doesn't have to be neat. Mark the fixed things you can't move: the house wall, fences, property lines, big trees, downspouts, and the AC condenser. These constraints shape everything, so get them on the page first.

Step 2 — Measure each edge

Walk the outline and measure every edge. Tools, easiest to fanciest:

A tape measure — fine for small beds and patios.
A measuring wheel — much faster for a whole yard; you just roll and read.
Your phone — many phones can measure distances, and some apps let you draw a to-scale map of the space directly.

Write each measurement on your sketch as you go. For long runs, a helper holding the other end of the tape saves a lot of frustration.

Step 3 — Turn shapes into square footage

Most yards aren't tidy rectangles, and that's fine — you break them into shapes you can calculate:

Rectangle or square: length × width.
Triangle: ½ × base × height (great for corner cut-offs and wedge-shaped beds).
Circle: π × radius² (about 3.14 × radius × radius) for a round bed or patio.

Split an odd yard into a few of these, calculate each, and add them together. That total, in square feet, is the number the rest of your plan runs on.

How much mulch or soil? These are sold by volume, so you need area and depth. A handy rule of thumb: one cubic yard covers about 100 square feet at 3 inches deep (or roughly 160 square feet at 2 inches). To calculate exactly: multiply bed square footage by depth in feet to get cubic feet, then divide by 27 for cubic yards. Measuring first is what stops you from ordering two yards when you needed one — or making a second trip.

Step 4 — Figure out plant counts

Plant tags list a recommended spacing (say, 18 inches apart). Your measured bed dimensions plus that spacing tell you how many plants actually fit — so you buy the right number instead of eyeballing it, coming up short, and making a second trip in a different plant batch. This is where measuring pays for itself most obviously.

Before any digging that follows your plan, call 811 — every dig, every time. 811 is the free national call-before-you-dig service; utilities mark buried lines at no cost, typically within a few business days (required notice varies by state, commonly 2–3), and it's legally required in most states. Measuring is safe; digging into an unmarked line is not. (Source: national 811 / Common Ground Alliance.)

Where Yardable helps

The math above is exactly what Yardable does for you. Its Measure tool lets you map your space to scale, and it turns those dimensions into plant counts, material amounts, and a running budget automatically — no cubic-yard arithmetic, no spacing guesswork. Your photos and detailed plan stay on your device. Measure and plan one zone free — no card.

Measure your yard free

Frequently asked

How do you measure a yard for landscaping?

Sketch a rough overhead outline and mark fixed features. Measure each edge with a tape measure, wheel, or phone. Break odd shapes into rectangles and triangles, measure each, and add them up. Length × width for rectangles (½ × base × height for triangles) gives the total square footage every estimate depends on.

How do I calculate my yard's square footage?

Rectangle: length × width. Irregular yard: divide it into rectangles and triangles, calculate each area, and add the results. That total in square feet is what you use to buy the right mulch, soil, seed, and plants.

How much mulch or soil do I need?

You need area and depth. Rough rule: one cubic yard covers about 100 sq ft at 3 inches deep, or ~160 sq ft at 2 inches. Exactly: bed square footage × depth in feet = cubic feet, then ÷ 27 for cubic yards. Measuring first prevents over- and under-ordering.

Do I need special tools?

No. A tape measure works for small areas, a measuring wheel is faster for big ones, and many phones can measure distances or draw a to-scale map. The goal is real dimensions instead of guesses, so plant counts and material amounts are right the first time.

Measure once, plan with confidence

Yardable maps your space to scale and turns it into plant counts, material amounts, and a running budget — automatically. One zone free, on your device. No credit card.

Open Yardable