Measure land, lots and fences to the inch

AcreRuler is a free acreage and land area calculator that runs in your browser and installs on iPhone and Android. Area and length results are always free.

Live tool. Open the full app to save projects, export PDF and KML, and use it offline.

Zoom past the photo limit

Over-zoom to level 22 and place points with a crosshair, so your finger never hides the corner. A magnifier shows where a dragged point lands.

Cut out the house and pool

Subtract buildings, pools and driveways from a lawn, and add several areas into one job total.

Type real lengths

Lock any side to the length and bearing on your deed or tape, then check your result against the known acreage, with the % difference.

Materials that match the job

Fence posts and rails, gravel with compaction, mulch, topsoil, concrete, sod, seed, straw blanket and pavers, with waste % and cost.

Sharp US aerial photos

USDA NAIP aerial imagery (down to 0.3 m) from USGS, plus topo and street maps. The photo's capture date is shown.

Offline and autosaved

Every edit saves on your device instantly. Walk a field with GPS and no signal, with live accuracy (±m) and averaged corners.

Export what you measured

PDF report with map, scale bar, numbered corners, side lengths, coordinates and materials (add your business logo), plus KML for Google Earth, GeoJSON, GPX, CSV and a PNG image.

Guides

Pricing

Every measuring tool and every area and length result is free. AcreRuler Pro adds unlimited projects, PDF reports and GIS exports: $29.99 once (launch price, then $39.99) or $24.99 a year. No weekly plans and no subscription required. See pricing.

FAQ

Is it free?

Yes. Drawing, area, perimeter, side lengths, GPS walk and up to 3 saved projects are free, and results are never hidden. Pro is optional.

Does it work without cell service?

Yes. After the first visit the app works offline. Map areas you've already viewed stay cached, and GPS works without signal.

How accurate is it?

On clear, recent imagery, careful corner placement usually lands within 1 to 2% of surveyed acreage. Use "Check against known" to compare with your deed. It is not a legal survey.

Can I install it on my phone?

Yes. On iPhone, open it in Safari, tap Share, then Add to Home Screen. On Android Chrome, tap Install app.