Radius Map
Draw one or more true-distance circles in miles or kilometres around any address on a map, see the area each covers, and check whether another place falls inside.
Your browser asks before sharing your position. Coordinates and typed text are sent only to the lookup services named on the result; this site stores nothing.
How to draw a radius on a map
- Enter the radius. One number, or up to four separated by commas, such as 5, 10, 25. Choose miles or kilometres.
- Set the centre. Use your location, type an address or coordinates, or click the map.
- Read the circles. The table gives each circle's area, circumference and diameter.
- Check a place. Type an address to see its distance from the centre and which circles it falls inside.
- Share it. The page address updates with the centre and radii, so you can copy and send it.
10 reasons to draw a radius on a map
Checking a delivery or service area
See which neighbourhoods fall inside a 10-mile delivery radius before promising a customer.
House hunting within a commute limit
Draw 15 and 30 miles around the office to narrow down where to look.
Checking a non-compete or radius clause
Contracts sometimes forbid working within a set distance; see what that circle covers.
Planning a store or franchise territory
Overlapping circles show where two locations would compete.
Drone and model-aircraft distance limits
Visualise a maximum range around a launch point.
A 'how far can I go today' travel ring
Rings at 50, 100 and 200 miles for picking a weekend trip.
Event or wedding guest travel
See which guests are within an hour's radius of the venue.
School or club catchment questions
Check whether an address falls inside a published distance rule.
Emergency planning drills
Draw an evacuation or alert distance around a site for a tabletop exercise.
Running and cycling loops
See how far a 5 km radius from home reaches for planning routes.
How the circles are drawn
Each circle is made of 180 points that are all exactly the chosen distance from the centre, measured over the WGS84 ellipsoid with Vincenty's direct formula. That makes it a true ground radius. On the map's Web Mercator projection, shapes are stretched more the further they are from the equator, so a large circle can look slightly egg-shaped even though every point is the same distance away.
The area and circumference in the table use a sphere of the mean Earth radius (a spherical cap), which for everyday radii matches the flat πr² and 2πr to the digits shown. The 'is a place inside' check measures the straight-line distance from the centre to the place with Vincenty's inverse formula and compares it to each radius. Map images are OpenStreetMap tiles; addresses are found with Photon (OpenStreetMap).
Limits: a radius is a straight-line distance, not a travel distance — rivers, mountains and road layouts make the distance by road longer, often much longer. Address positions come from OpenStreetMap and can be at the street or the middle of a town. For a legal radius rule, check how the rule itself defines the measurement.
Sources
- Vincenty (1975), Survey Review — NOAA NGS copy
- OpenStreetMap copyright and licence — map tiles and data
- OpenStreetMap wiki: Slippy map tilenames — Web Mercator tile maths
Frequently asked questions
How do I draw a radius around an address?
Type the radius, then enter the address and press 'Set centre'. The circle is drawn on the map with its area and circumference.
Can I draw more than one circle?
Yes. Enter up to four radii separated by commas, for example 5, 10, 20.
Why does my circle look oval?
Web maps stretch distances away from the equator. The circle is still a true radius on the ground; the map projection distorts its shape.
Is the radius the driving distance?
No. It is the straight-line distance. Driving distance to the edge of the circle is almost always longer.
How do I check if a place is within the radius?
Use 'Is a place inside the radius?' and type the address. The page shows its distance from the centre and which circles contain it.
Can I share my radius map?
Yes. The page address updates with the centre and radii; copy it from your browser's address bar.
Can I use kilometres?
Yes. Choose kilometres in the unit menu.
Related tools
As the Crow Flies Distance Calculator
Enter two places and get the straight-line distance between them in miles, kilometres and nautical miles, measured on the WGS84 ellipsoid, with the compass bearing and the route on a map.
Vincenty (1975) geodesic on the WGS84 ellipsoid
Halfway Point Between Two Cities Calculator
Enter two cities or addresses and get the exact halfway point between them — or any split you choose — with the nearest named place and the distance from each side.
Vincenty (1975) geodesic midpoint on WGS84, OpenStreetMap place names
Random Location Generator
Generate truly uniform random coordinates anywhere on Earth, inside a box, or within a radius of a place — with an option to skip open sea and the points shown on a map.
Uniform sphere point picking (MathWorld) with Web Crypto randomness
Bearing Calculator
Enter two places or click a map and get the true and magnetic bearing from one to the other, the bearing on arrival, the back bearing and the constant-heading rhumb line.
Vincenty inverse on WGS84; NOAA/BGS World Magnetic Model 2025
Distance Between Two Places
Enter any two addresses or places and get both the straight-line distance and the driving, cycling or walking distance and time, drawn on a map.
Vincenty on WGS84; OSRM routing over OpenStreetMap (FOSSGIS)
Distance Between Cities
Pick any two US cities or towns from the Census list of 32,000 places and get the miles between them in a straight line and by road, plus the distance to the largest US cities.
Census 2024 Gazetteer place points; OSRM driving routes