Free Lawn Calculator Measure Your Lawn from Satellite
High-resolution satellite imagery measures the exact square footage of your lawn, then generates a personalised lawn care plan with the right amount of fertilizer, seed, herbicide, and lime for your specific yard. Works for any US address.
How it works
Four steps. Two minutes.
1
Find your property
Type your address — or use your phone's location to drop right onto your house.
2
Outline your whole lot
Tap each corner of your property line — including the house and driveway. Most lots have 4–8 corners.
3
Mark non-grass areas
Trace your house roof, driveway, patios, and flower beds. We subtract each from the total.
4
Get your AI plan
Pick your grass type (or let the AI suggest one) and we generate a month-by-month task calendar.
Why bother measuring?
Almost every lawn product on the market is dosed by square foot. A bag of starter fertilizer might cover 5,000 sq ft. A bottle of crabgrass preventer might cover 2,500 sq ft.
If you guess your lawn is 5,000 sq ft and it's actually 3,200, you over-apply by 56% — wasting money and burning the grass. Get it wrong the other way and your weed control simply doesn't work.
The difference
1–3%
Satellite accuracy vs. tape
2 min
Time to measure
Same satellite data professional landscapers and county tax assessors use.
What you get with your plan
Everything you need to take care of your lawn this year.
Exact square footage
Separate totals for lawn, house, driveway, flower beds, and any other features.
12-month care calendar
Timing for fertilizer, weed control, mowing, watering, and overseeding — tailored to your grass.
Exact product doses
For each task, the exact product and the exact dose for your square footage. No math required.
Live soil-temp triggers
Real-time soil temperatures from the National Weather Service so you apply pre-emergent at the right time.
Mulch calculator
For your flower beds: yards of mulch and bags needed at common retailers.
Save for next year
Optional free Measure Lawn account so the plan is ready every season.
Frequently asked questions
Tap any question to expand.
Is the lawn calculator really free?
Yes — measuring your lawn and getting a personalised AI lawn care plan is 100% free, no account required. We earn a small commission if you buy any of the recommended fertilizer, seed, or other products through our Amazon links — that's how we keep the tool free to use.
How accurate is the satellite measurement?
Each shape you draw is measured using Google's geometry library against high-resolution satellite imagery — the same data professional landscapers and county tax assessors use. Typical accuracy is within 1-3% of a hand tape-measure, far better than rough rectangle estimates. The plan tells you exact pounds of fertilizer, ounces of herbicide, and bags of seed for your real square footage.
Does it work for any address in the US?
Yes. The calculator works for every US address and is mapped to all 50 states' climate zones, soil temperature triggers, and locally appropriate grass types. We also automatically detect whether your region is cool-season (north) or warm-season (south) and tailor the timing of every task in your plan.
How long does it take?
Most users finish in 2-3 minutes: type your address, click a few corners to outline your lot, mark the house and driveway, and you're done. There's no account creation, no payment, and no waiting on a sales person.
Do I need a Google or Amazon account?
No. The calculator runs entirely in your browser using public satellite imagery — you don't need to sign in to anything to measure your lawn and see your plan. You only need accounts later if you want to save your plan for next year (free Measure Lawn account) or buy any of the recommended products.
What exactly does the AI plan include?
A month-by-month task calendar tailored to your grass type, weed pressure, and climate zone: fertilizer applications with exact pounds, pre-emergent and post-emergent herbicide timing, mowing height and frequency, watering schedule, overseeding and aeration windows, and soil-temperature-triggered tasks like grub prevention. Each task links to the specific Amazon product and the dose for your square footage.
Will it work on my phone?
Yes — the tool is mobile-first. You can outline your lot and mark features with taps right from your phone's satellite view. Most users actually find it easier on mobile than desktop because they can pinch-zoom to see fence lines.
How does this compare to measuring with a tape measure?
A tape measure on an irregular yard takes 30-60 minutes, requires multiple passes, and still gives you a rough rectangle area. The satellite tool finishes in 2 minutes, captures the actual shape of your lawn (including curves and odd corners), and subtracts non-grass areas like the driveway and flower beds — so your fertilizer doses are accurate, not wasted on patio.