Measure land from a survey or plat image
Answer first: upload a clear survey, plat or site-plan image, use one printed dimension to set the scale, then click around the property boundary. The tool estimates square feet, acres, square metres and perimeter directly in your browser.
This tool reads the selected image in your browser. This build does not upload the image to a server.
When this tool is useful
If you already have a survey, plat, subdivision sketch, site plan or scanned property drawing with at least one known dimension, you may not need a satellite map to estimate area. The known line provides a scale. Once calibrated, the traced polygon can be converted from image pixels into real-world dimensions.
Why one known dimension matters
An image by itself has pixels, not feet or metres. The calibration line tells the tool how many real-world feet correspond to each pixel. Area then scales by the square of that ratio, so a poorly chosen or inaccurately clicked scale line can materially affect the result.
Choose the longest reliable dimension you can
For better precision, use a clearly labelled line that is relatively long on the image. A 200-foot property side generally gives a more stable scale than a tiny 8-foot annotation because a one-pixel clicking error represents a smaller percentage of the reference length.
Scanned documents can be distorted
If a paper survey was photographed at an angle, stretched, skewed or scanned non-uniformly, one scale may not be equally accurate across the whole image. Use this tool for planning and cross-checking, not to establish a legal property boundary.
What this estimate does — and does not — tell you
The result can help answer questions like “approximately how many acres are shown on this plat?” or “what is the approximate perimeter for a fence estimate?” It does not replace deed calls, bearings, monuments, easements, parcel records or a licensed boundary survey.