Map With Radius – Free Radius Map Tool (Miles & KM)

How to Draw a Circle on a Map

Use the home controls above: select the correct location, distance or measurement mode, then check the result unit and geographic assumptions before sharing. The map calculation is only as meaningful as the chosen center and underlying data.

Try the same five-mile radius around a waterfront downtown and an inland neighborhood. The two circles have the same mathematical area, but one can cover substantial water while the other covers different residential districts. A straight-line circle is a geographic comparison, not a drive-time promise.

The marker at the middle of the circle is the measurement origin. The radius is the center-to-edge distance, the diameter is twice that value and the area is the space inside the boundary. A ten-mile radius therefore has a twenty-mile diameter. Its ideal circular area is approximately 314.16 square miles, not ten square miles. The area increases with the square of the radius: doubling a five-mile radius to ten miles multiplies its area by four. That fact matters when a reader assumes a 20-mile service circle is only twice as large as a 10-mile one.

Circle boundaries can pass through water, undeveloped land, airports or locations separated by highways. An address inside the circle is within the specified shortest surface distance; it is not necessarily within that number of driving miles. For road reachability choose the Drive Time Map; for pedestrian time choose the Walking Radius Map. Neither of those is equivalent to a straight-line radius.

Use My Current Location to Draw a Radius

My location is optional: browsers ask permission and may decline it. If permission is denied, tap the map or submit a full address. Search is rate-limited when using the public fallback service.

For exact boundaries, use coordinates rather than an imprecisely geocoded street name. A location search selects a geographic reference point; it does not establish ownership or zoning.

Choose a Radius in Miles or Kilometers

It draws all points approximately the selected surface distance from a center on Earth. The geometry is fundamentally different from a street route, traffic catchment or administrative boundary.

The center can be a current GPS coordinate, address, city center, business site or user-selected map point. Moving it changes which places fall inside, even when the radius remains the same.

A radius is not a ranking of neighborhood quality; it is a precisely defined geographic distance from one center. Begin by deciding what question you are trying to answer. If you want to see the streets around an address, a one- or two-mile circle may be visually useful. If you want to compare delivery territories or event catchments, ten- to fifty-mile circles make the boundaries easier to evaluate at a regional level. The same radius produces the same ideal mathematical area wherever it is centered, but the population, roads, coastline and accessible destinations inside the circle differ dramatically.

1, 2, 5, 10, 20, 25, 30, 50 and 100 Mile Radius Maps

One- and two-mile rings are useful for local checks, whereas 25- or 50-mile rings visualize wider territories. The distance you type is the radius, not a diameter or travel time.

A 5-mile circle has roughly 78.54 square miles of planar area; a 10-mile circle has roughly 314.16. The covered area quadruples when the radius doubles.

Google Maps Radius: How It Differs

Ordinary Google Maps measures a path but does not offer the same convenient fixed-radius drawing control. A separate circle creator can generate polygons for import into Google My Maps.

Use our Google Maps radius guide for detailed desktop and mobile instructions; GeoJSON and KML exports convey geometry, not navigation directions.

Calculate Radius Area and Circumference

These are reference planar circle areas, not actual road-access areas.

For small planar circles, area = π × radius² and circumference = 2 × π × radius. We project boundary points on an Earth-surface sphere and display approximate areas.

Map imagery, place-label positions and GPS coordinates contain error. A radius circle is not a claim about road access, exact building edges, Census population or official service entitlement.

Multiple Radius Circles and Locations

Each added circle has its own fixed center and distance. Comparing different stores, schools, neighborhoods or service bases is a practical first step in coverage planning.

Overlapping circles identify places that meet multiple straight-line criteria, not places reachable by vehicle from every center. For measurable route travel reach use an isochrone tool.

Straight-Line Radius vs Driving Distance

A five-mile geodesic circle includes every point at most five surface miles from the center, whether or not a road connects them. A drive-time isochrone follows a routable street network and can reach farther in some directions than others. Do not label a simple circle “30-minute driving radius” without routing data.

Radius Distance and Coverage Reference Table

A five-mile circle has a geometric area of about 78.54 square miles, regardless of where the center is placed. The places inside it, however, change with the origin.

Suppose a community project draws circles centered on the same library. At five miles, the ideal coverage area is π × 5² = 78.54 square miles. At ten miles, it is π × 10² = 314.16 square miles. The additional five-to-ten-mile band contributes 235.62 square miles. It would be incorrect to add the two cumulative circle areas together as if they described non-overlapping territories. To compare two different centers, you must calculate the intersection before counting the shared area only once.

On this map, start with the smaller circle so the central neighborhood is easy to see. Add the larger circle, adjust its color and share or export the combined geometry. Where the map is used in a report, state the center address, radius units, whether distances are geodesic and the date of the map reference. That makes another reader capable of reproducing your result rather than guessing what a screenshot means.

Geographic circles are constructed from latitude and longitude coordinates. Their edge is an approximation of constant surface distance on Earth; exported polygons approximate that curved boundary with connected vertices. Resolution matters more for large circles and near coastlines, where an exported coarse polygon may show visible straight segments. Avoid mixing international nautical miles, ordinary statute miles and kilometers without an explicit conversion. One statute mile is exactly 1.609344 kilometers; one nautical mile is 1.852 kilometers.

For reproducible exports, a KML or GeoJSON file is preferable to a screenshot because it retains geographic coordinates. A PNG is useful for a slide, but its pixels do not encode a measurable boundary. If you are combining multiple polygons as legal parcels or administering a boundary subject to regulation, validate the exported geometry using appropriate authoritative data rather than treating a public map as a certified survey.

How Accurate Is a Map Radius?

Search for a city or complete address, use latitude and longitude, tap the map, or explicitly grant current-location permission. The center marker can be dragged.

Use the numeric radius field or quick presets. A circle appears immediately; its diameter and approximate enclosed area update with each change.

Choose a second center and press Add circle, then export the geometry as KML/GeoJSON or copy a shareable link.

A straight radius is the correct first tool when the question is “Which coordinates lie within X miles of this point?” It is only the first step for a question such as “Which customers can I serve?” A service analysis must also consider road networks, capacity, business hours, jurisdiction and potentially population or postal geographies. Users should select an analytical method based on the decision being made, rather than treating the same blue circle as a universal answer.

For example, a bakery considering a delivery boundary can draw five miles to understand geographic scale, then verify driving distance and local barriers for real deliveries. A health-service planner might prefer driving-time or walking-time access. A property owner measuring a parcel should use an area polygon instead. Each specialized tool links back to the main radius map so the distinction stays clear.

Common Uses for Radius Maps

Use circles for preliminary delivery territories, neighborhood comparisons, event planning and fixed-distance geographic checks. For residents or ZIP counts, connect the geometry to actual datasets; for driving accessibility, use a real route network. The circle alone does not measure people, roads or customers.

Related Radius Tools and Resources

See the radius map home, distance calculator and calculation methodology. Choose the page whose measurement type matches your question.

A mile or KM radius map answers where a point is within a fixed geographic distance. A drive-time tool answers how far a route network takes you within minutes, and a population-radius tool uses an explicit demographic dataset.

For specialized questions the linked tools below keep each measurement type separate instead of pretending that one circle can answer all of them.

Frequently Asked Questions