Here's something the turf industry doesn't advertise: a lot of people end up paying for grass they throw away.
It's not because they measured wrong. It's because most turf is sold in standard 15-foot-wide rolls, and standard rolls don't care what shape your yard is. Got a 9-foot-wide side yard? You're buying 15 feet and cutting six feet of it into scrap. Got a balcony that's 6 feet across? Same story.
That leftover isn't small. On a 40-foot run, six wasted feet of width is 240 square feet of turf you paid for and will never use. At typical pricing, that's real money sitting in your garage until you finally admit you're not going to do anything with it.
So before you order anything, let's figure out what you actually need.
Step 1: Measure the space, not the yard
Sounds obvious. It isn't.
Sketch the area on paper and break it into rectangles. Don't try to measure an odd shape in one go — split an L-shaped yard into two rectangles, a curved bed into a rectangle plus a rough triangle. Measure each piece separately at its widest and longest points.
Then write down the two numbers that matter most: the widest single width you need, and the longest single run. Those determine which turf size makes sense, not just the total square footage.
Quick example. A dog run that's 8 feet wide and 30 feet long is 240 square feet. But if you buy it as 15-foot-wide roll, you're paying for 450 square feet and cutting away nearly half.
Step 2: Add your seam allowance and edges
Once you have your rectangles, add a little breathing room:
3 to 6 inches on every edge. You'll trim this off during installation once the turf is settled. Cutting tight and hoping it lands perfectly is how people end up with a visible gap along a fence line.
Extra at seams if you're joining pieces. Seams should have the grass blades running the same direction on both sides, so you may need to orient a second piece a specific way rather than just rotating it to save material.
For most residential jobs, adding about 5% to your total is a safe cushion. Don't add 20% just in case
— that's the same overbuying problem in a different outfit.
Step 3: Match the grass to the job, not just the size
Buying the wrong product for the space wastes more money than buying the wrong amount.
MegaPet is built for dogs — high permeability so urine drains through instead of pooling, and durable enough for a dog that sprints the same track every day. If you're doing a dog run or a potty area, don't substitute a lawn product.
MegaLawn is the front-yard, curb-appeal choice. This is the one you want people to look at from the sidewalk.
MegaPorch is made for hard surfaces — decks, patios, balconies, and yes, indoors as a rug. It rolls right onto concrete without the base prep a soil install needs.
MegaPlay goes where kids do. Taller blades hold more infill, which cushions falls. Pair it with shock pads underneath if you're aiming for a lower GMAX score.
MegaGolf has a tight, dense pile so the ball rolls true. Nobody wants a putting green with drag.
MegaSport absorbs impact and holds up to hard cuts and pivots. Plan on about three to four pounds of infill per square foot for the best result.
Step 4: Buy the width that fits
This is where you actually save money.
Turf comes in 5ft, 7.5ft, 10ft, and 15ft widths, cut to any length from 1 to 100 feet. That means the 8-foot dog run from earlier gets a 10-foot width with two feet trimmed off — not a 15-foot roll with seven feet in the bin.
Run through your sketch and pick the smallest width that covers each section:
Balcony or narrow walkway (under 5ft): 5ft width
Side yard, patio, small pet area (5–7.5ft): 7.5ft width
Standard dog run, medium patio (7.5–10ft): 10ft width
Front lawn, backyard, sports area (over 10ft): 15ft width, or plan a seam
If a section is 11 feet wide, don't automatically jump to 15. Two 7.5-foot pieces with a seam down the middle may cost less and waste nothing — it just takes a bit more installation care.
Step 5: Don't forget what goes underneath
Turf is the visible cost. The rest is what makes it last.
Depending on your surface, you'll likely need seaming tape and turf glue for joins, nails or staples around the perimeter, infill to keep blades upright and the turf weighted down, and possibly a pad if it's a patio or play area.
Infill isn't one-size-fits-all either. Pet areas benefit from an odor-neutralizing option, and sun-exposed installations run cooler with a heat-reducing infill. If you've ever touched dark turf in full sun in July, you know why that matters.
A few things worth checking before you buy anywhere
Drainage holes. Not all turf has them. A customer of ours built a dog run, ordered extra pieces from another seller, and got turf with no drainage at all. On a pet area, that's not a small oversight.
PFAS. Ask directly. Not every manufacturer will give you a straight answer, and forever chemicals
in something your kids and dogs sit on is worth a straight answer.
Warranty length. Fifteen years is a reasonable benchmark. Anything much shorter tells you what the manufacturer expects.
Samples. Order them. Color and texture look different in a photo than they do in your actual light, next to your actual fence, at 4pm. Six 4x4
samples cost less than one wrong roll.
The short version
Measure in rectangles. Note your widest width and longest run. Add about 5% for trimming. Pick the product by use case, not by price. Then buy the width that fits your space instead of the width that fits someone else's warehouse.
Do that and you'll spend less, waste almost nothing, and end up with a lawn that looks intentional instead of patched together.
Still not sure what your space needs? Grab a sample box, or send us your measurements and we'll price the whole thing out for you — turf, infill, accessories, all of it.
Metadata Package
Meta Title: How Much Artificial Grass Do You Need? Measuring & Sizing Guide
Meta Description: Most people overbuy artificial turf by 30% or more. Here's how to measure your space, pick the right width, and stop paying for grass you'll throw away.
Slug: how-much-artificial-grass-do-i-need
Tags: artificial grass measuring guide, how much turf do I need, synthetic turf sizing, custom width artificial grass, turf installation planning, artificial grass cost
Suggested internal links (place during upload, not in draft body):
MegaPet
→ /products/megapet
MegaLawn
→ /products/megalawn
MegaPorch
→ /products/megaporch
MegaPlay
→ /products/megaplay
MegaGolf
→ /products/megagolf
MegaSport
→ /products/megasport
seaming tape and turf glue
→ /pages/installation-materials
infill
→ /products/super-fill
Grab a sample box
→ /products/free-premium-grass-samples
price the whole thing out
→ /pages/free-estimates
Social Caption:
Most people buy 30% more artificial grass than they need — and it's not a measuring mistake.
It's because standard turf comes in 15-foot rolls, and your side yard is 9 feet wide. That leftover six feet? You paid for it, and it's going in the garage.
Here's how to measure properly, pick the right width, and stop funding your own scrap pile.