How big is your lawn?

How it works

1. Enter an address or use your location. Confirm the pin is on your house.
2. Check the property line (when available). Where the county publishes parcel records it is drawn for you; anywhere else you trace it in a few taps.
3. Find the lawn. One press and the AI traces the grass inside the line, or draw it yourself. Square feet and acres update as you go.
4. Analyze shade and water. Open the map in the shade analyzer to see the sun and shade on every part of the lawn, and in the water map to see how rain and irrigation water moves across it (coming soon).

What it does that other lawn tools don't

A shade map built from lidar, not solid shapes

Most shade maps build your yard from 3D imagery: a model stitched together from aerial photos, where every tree is a solid lump that blocks all of the sun. Real trees don't. Lidar is a laser survey, and its pulses slip through the gaps between leaves and branches on their way to the ground, so they record how open each crown really is.

The shade analyzer builds your property in 3D from those pulses (USGS's public 3DEP lidar, lined up with the aerial photo and your property line when available), and each tree lets through the light it actually lets through. That makes it inherently more accurate under trees, which is exactly where a lawn struggles.

• Hours of sun and daily light (DLI) for every part of the lawn, on any day of the year, or a box you draw.
• Leaves on the right calendar. Trees leaf out in spring and drop their leaves in fall on your area's dates, so spring and fall shade are not summer's.
• Checked against the real thing. Against NEON's light sensors on the ground under forest canopies, its summer shade came within about a point of the measured light at most sites.
• Made for choosing grass. Shade, more than anything, decides which grass will grow where: fine fescues take shade that Bermudagrass and Kentucky bluegrass won't. It already shows each spot's light through the growing season for cool-season and warm-season grass.

Finish a lawn map and open it from the dashboard, or go straight to the shade analyzer with an address. It works wherever USGS lidar covers the address.

Counties with property lines

Property lines come from the public parcel records counties and states publish. Where none exist yet, everything else still works: you trace the line yourself, and the measurement is just as accurate.

1,732 counties across 50 states and Washington, D.C., with 27 served by a statewide parcel layer.

Free, without the catch

• No ads. Not on the map, not between steps, not anywhere.
• No tracking. No analytics scripts and no ad trackers. The map and imagery providers only see the map tiles your screen asks for.
• No lead forms. Your address is not sold, and nobody calls you about it.
• What is kept, said plainly. Maps you save stay in your account. When you finish a map, its lawn outline and aerial view may be kept to train the detector, without your address or your account.
• Paid for by people who want it to exist. If it saved you a trip with a measuring wheel, there is a Support link.

Questions