Map Measuring Tool — Distance, Area & Address Search
Measure real-world distances and areas on a detailed street or satellite map, down to the foot. Type an address and the map flies right to it, then click to trace a property line, a driveway, a fence run, or a lot — and read the length in feet, yards, and miles, or the area in square feet and acres. Drag any point to fine-tune, and switch between street and satellite imagery.
How to Use
- Type a street address (or place name) in the search box and press Enter — pick a result and the map flies there. Or use “My location.”
- Switch the base map between **Street** and **Satellite** in the layers control (top-right of the map). Satellite is best for tracing lot lines, roofs, and driveways.
- Zoom in close (scroll or the + button) so you can place points accurately, then click **Measure distance** or **Measure area**.
- Click on the map to drop points. Distance shows each segment’s length and a running total; Area shows the enclosed square footage, acreage, and perimeter.
- Drag any point to nudge it, use **Undo** to remove the last point, and read live measurements in the panel — feet/yards/miles or square feet/acres (toggle units any time).
- Click **Clear** to start over. Nothing you draw is uploaded — measurements are computed in your browser.
Measurement
Map data
Street map & address search powered by OpenStreetMap (geocoding via Nominatim). Satellite imagery © Esri, Maxar, Earthstar Geographics. This tool loads map tiles and address lookups from these external services; the points you draw and all measurements are computed in your browser and never uploaded.
Worked Example
Checking the tool with shapes of known size. An acre is 43,560 ft², a square 208.71 ft on each side. Press One acre and the tool draws that square where the map is and measures it back: 43,560 ft², 1.000 acre, with a perimeter of 834.8 ft. An American football field with its end zones, 360 × 160 ft, measures 57,600 ft² (1.322 acres); a doubles tennis court, 78 × 36 ft, 2,808 ft²; and One mile draws a line of 5,280 ft.
Measuring a real lot. Search the address, switch to Satellite, zoom in until you can see the boundary markers or fence lines, choose Area, and click each corner in order. A typical suburban lot of 75 × 120 ft reads about 9,000 ft², 0.21 acres.
The common mistake: measuring zoomed out. At street-level zoom one screen pixel can cover several feet, so a corner clicked from far away can be off by 5 to 10 ft. Zoom in close before placing each point, and drag points to refine them.
Show Work
Formulas
Measuring from Above
Every point on the map is a latitude and longitude. Distances between them are measured along the Earth’s surface with the haversine formula, and areas with the spherical polygon formula, the same methods web mapping apps use. Over a yard or a field the Earth’s curvature hardly matters, but the formulas stay correct for a long boundary or a large farm.
The limit is the picture, not the maths. Satellite and aerial images are stitched and corrected, but can be shifted by a few feet, and tree canopy or roof overhangs hide the real boundary. For legal boundaries, use the recorded plat or a licensed survey; for ordering materials, a careful map measurement is usually well within the waste allowance.
About This Tool
This tool measures distances and areas on a street or satellite map: search an address, click points along a line or around an area, drag them to refine, and read the length, area, perimeter and acreage in imperial or metric units. Known-size shapes can be drawn at the map centre to check it. The points you draw are measured in your browser; map tiles and address searches come from the services credited on the page.
Use the measurements in the material calculators: the area for sod, mulch, gravel or pavers, the length for a fence.
Related tools: Square Footage Calculator, Fence Calculator, and Sod Calculator.
Frequently Asked Questions
How accurate is the measurement — really down to the foot?
The math is geodesic (it accounts for the curvature of the Earth) and is as precise as the points you click, so on a tight zoom you can measure to within a foot or two. The limit is the imagery, not the calculation: satellite tiles can be slightly offset from the true ground position and your clicks are only as exact as the pixel you tap. For a legal boundary always rely on a surveyed plat — this is a fast, practical estimate, not a survey.
How does the address search work?
When you type an address and press Enter, the tool looks it up with Nominatim, the free geocoder built on OpenStreetMap data, and flies the map to the best match. It searches only when you submit (not on every keystroke) to stay within the service’s fair-use limits. If an address doesn’t resolve, try adding the city and state, or search the nearest intersection and pan from there.
Can I measure the area of an irregular lot?
Yes. Choose Measure area and click each corner of the property in order; the tool encloses the shape and reports its area in square feet and acres plus the perimeter. Drag any corner to line it up exactly with the boundary on the satellite image. The area is computed with a spherical-earth polygon formula, the same approach mapping apps use, so even a many-sided lot comes out right.
Does this work on satellite imagery?
Yes — switch the layers control to Satellite to trace features you can actually see: rooflines, driveways, paths, tree lines, and fences. A street-name overlay is available so you don’t lose your bearings on the imagery. Satellite is usually the most useful layer for land and property measuring.
Is my location or anything I draw sent anywhere?
The points you click and every distance or area are calculated locally in your browser and are never uploaded. The map does load tiles from external map servers and your typed address is sent to the geocoder to look it up — that network traffic is what makes a live map possible. If you use “My location,” your browser asks permission first and the coordinates are used only to center the map.
How do I use the Map Measuring Tool — Distance, Area & Address Search?
Just type your numbers. The answer shows up right away — there is no button to press. Change anything and it updates by itself.
Is it free? Does it work without internet?
Yes to both. It is free with no sign-up, and once the page has loaded it keeps working even with no internet.
Where does my data go?
Nowhere — every calculation runs on your own device. Nothing you enter is uploaded, logged, or stored.
Common Use Cases
Estimate a lot or acreage
Trace a property on the satellite layer to get its square footage and acres before buying, fencing, or listing it.
Measure a fence or driveway run
Click along where a fence, wall, or driveway will go to get the total length in feet for ordering materials.
Plan landscaping & paving
Outline beds, lawns, patios, or a parking area to get the square footage feeding into mulch, sod, gravel, or asphalt estimates.
Check a distance between two places
Search an address, drop a couple of points, and read the straight-line distance in feet, yards, or miles.
Scope a job from the office
Find a client’s address, switch to satellite, and rough out roof, yard, or site dimensions before the site visit.
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