Radius Map — Draw a Radius Around Your Location

Pick a distance, get an instant area, circumference, and straight-line reach — from your location, a US city or ZIP, or wherever you click on the map.

All values computed live from area = π · r²; basemap is OpenStreetMap. Methodology and sources below.

Three ways to place the centre:

Tap Use my location for where you are.
Search a US city or ZIP in the box beside the map.
Click anywhere on the map to drop the pin.

Then pick a radius from the presets, the slider, or by dragging the red handle on the ring.

Drag the dark centre pin to move the whole circle; drag the red handle on the ring to resize the radius. For exact distances, use the presets or slider; click any empty spot on the map to drop the centre there. Values update on release, so numbers stay steady while you drag.

Basemap © OpenStreetMap contributors — ODbL. See methodology.

Presets

Radius10 mi

0.1 mi250 mi

Deep-links canonicalise to the homepage.

Radius: 10 mi; 16.1 km
Area: 314 sq mi; 814 km²
Circumference: 62.8 mi; 101 km
Reach: 10 mi; edge-to-center, any direction

A radius map draws a distance circle so you can see what falls inside it — a job-search zone, a delivery area, or how far you can travel from a fixed point. For a 10-mile radius, that's 314 sq mi (813 km²) of ground and a 62.8 mi (101 km) boundary. Anywhere on that boundary is exactly 10 miles from centre, in a straight line.

What actually falls inside a radius

A radius on a map is a promise: anywhere I can reach without going further than N miles from this point. That's what makes it useful for real decisions — a 25-mile job-search radius is the pool of listings you'll actually consider; a 10-mile delivery zone is the ground your drivers cover before a time-slot promise becomes risky; a 5-mile apartment radius is the walk-and-transit envelope around a target address.

The number the tool draws doesn't change if you move the centre or rotate the map — it's a straight-line reach that treats "10 miles" as a physical envelope, not a driving route. A road-following alternative — a drive-time radius, or isochrone — bends the boundary to actual roads and speeds and is usually smaller than the straight-line reading suggests.

The four numbers your tool shows

Take a 10-mile radius as a worked example. Every number below comes from the same input — the radius you pick — via elementary geometry.

Radius: 10 mi; 16.1 km
Area: 314 sq mi; 814 km²
Circumference: 62.8 mi; 101 km
Reach: 10 mi; edge-to-center, any direction

Radius is the distance you picked. The slider goes from 0.1 mi (a block-sized circle, useful for micro-catchment or door-to-door planning) up to 250 mi (a multi-state view). Every reading shows both miles and kilometres.

Area is the ground surface inside the disc, computed π · r². A 10-mile radius covers 314 sq mi (813 km²) — that's the entire zone you're evaluating for a job search or a service area. Double the radius to 20 mi and the area jumps to 1,257 sq mi: 4×, not 2× (the square-law is spelled out below).

Circumference is the boundary length, 2 · π · r. For a 10-mile radius that's 62.8 mi (101 km) of edge. Useful when you're thinking "how long is the perimeter my delivery driver has to trace along the outside?" or sizing a geofence.

Reach is the straight-line distance from centre to any edge point — the same number as the radius, called out separately because most people mentally frame this as "how far can I get?" rather than "how big is my circle?". On a 10-mile radius, any point on the ring is exactly 10 miles from your pin, in every direction.

Radius sizes at a glance

Common radius choices and what they cover. Every number is computed from the same formulas the tool uses — no rounding tricks. Rows include every popular preset plus the medium-demand in-between sizes (15, 20, 30) our search data shows people actually pick.

Typical radius sizes and their computed area, circumference, and reach — all values from area = π·r² and circumference = 2·π·r.

Radius	Area (mi²)	Area (km²)	Circumference (mi)	Circumference (km)	Reach
1 mi (1.61 km)	3.14	8.14	6.28	10.1	1 mi (1.61 km)
5 mi (8.05 km)	78.5	203	31.4	50.6	5 mi (8.05 km)
10 mi (16.1 km)	314	814	62.8	101	10 mi (16.1 km)
15 mi (24.1 km)	707	1,831	94.2	152	15 mi (24.1 km)
20 mi (32.2 km)	1,257	3,255	126	202	20 mi (32.2 km)
25 mi (40.2 km)	1,963	5,085	157	253	25 mi (40.2 km)
30 mi (48.3 km)	2,827	7,323	188	303	30 mi (48.3 km)
50 mi (80.5 km)	7,854	20,342	314	506	50 mi (80.5 km)
100 mi (161 km)	31,416	81,367	628	1,011	100 mi (161 km)

Reach = the straight-line distance from the center point to any point on the edge, by definition equal to the radius. Values rounded for display; the tool computes to full precision.

The square-law: double the radius, quadruple the area.

Because area = π · r², the surface inside a circle grows with the square of the radius. Going 10 → 20 miles adds a lot more ground than the "×2" reading suggests: 4× more. Bumping a job-search radius from 20 to 30 miles opens up more than double the pool — 2,827 sq mi vs 1,257. Worth knowing before you dial the number in.

How people use a radius map

A 10-mile radius drawn on the radius map tool centered on Manhattan, New York — the red ring extends across the Hudson to Newark and Elizabeth on the west and out through Brooklyn to Valley Stream on the east, over real street detail. — A 10-mile radius around Manhattan rendered by the tool — the ring reaches Newark to the west and Valley Stream to the east.

Job search — "within 25 miles of home"

Almost every job board takes a radius input. A radius map lets you see what that filter actually covers before you commit to the commute. A 25-mile radius encloses 1,963 sq mi (5,083 km²) — for most US metros that's the entire commutable region plus a suburb ring. Draw it, screenshot it, keep it next to the listings.

Delivery or service zones

Set a straight-line radius as the outer bound of where you'll serve, then verify each edge case on the map. A 10-mile delivery radius has 62.8 mi (101 km) of edge — useful when deciding whether a driver can realistically cover the boundary inside a promised time-slot.

Apartment hunting near a fixed point

You have one anchor — an office, a school, a partner's flat — and want to filter listings by distance from it. Rental filters usually use a straight-line radius; this tool shows exactly what the "5-mile radius" checkbox will include. Any point on the edge is that distance from the anchor.

"How far can I get?" planning

Weekend range, day trips, custody geo-fences, or any "how-far-in-every-direction" question collapses to a radius. The straight-line reach is a ceiling: real travel time is usually shorter because roads bend — a proper drive-time radius (an isochrone) would show a smaller, road-shaped envelope.

FAA / FMCSA 150-mile short-haul (US commercial drivers)

US commercial-driver hours-of-service rules include a short-haul exemption tied to a 150-air-mile radius from the normal work reporting location. The catch: it's specified in air miles, not statute miles — so the real ground envelope is bigger than the "150" suggests.

Drawing a radius on Google Maps and other tools

Google Maps' consumer app doesn't include a native radius-drawing control, so most searches for "google maps radius tool" end up on a third-party tool. The usual workarounds are Google My Maps (custom-shape overlay), a third-party layer like Mapfrappe, or a dedicated radius calculator like this one. If you're specifically looking for how to draw a radius on Google Maps, all three require more clicks than drawing it here — plus the ring you draw here is shareable via URL.

Radius map — frequently asked questions

How do I draw a radius on a map?

Tap Use my location to centre the map on your current position — or search a US city or ZIP, or click anywhere on the map — then pick a preset chip (5, 10, 25, 50, 100 units) or drag the slider. The ring redraws on release, and every reading updates in miles and kilometres. You can also drag the red handle on the ring itself to resize, or grab the dark centre pin to move the whole circle.

How big is a 10-mile radius?

A 10-mile radius covers 314 sq mi (813 km²) of ground area, with a boundary length of 62.8 mi (101 km). Any point on the edge is exactly 10 miles (16.1 km) from the centre in a straight line.

What's the area of a 5-mile radius?

A 5-mile radius encloses 78.5 sq mi (203 km²) with a 31.4 mi (50.6 km) boundary. That's exactly a quarter of a 10-mile-radius area — because area grows with the square of radius (halving the radius quarters the area).

How do I map a radius around an address or ZIP code?

Use the Search US city or ZIP box beside the map (dataset covers ~41,500 US ZIPs). Type "10001" for Manhattan, or "Austin" for the city — pick a result, and the ring centres on that ZIP or city's core, ready for you to pick a radius. For an address outside the US, use Use my location or drop the pin by clicking the map.

How is the area calculated?

Standard circle formula: π · r². For a radius in miles the result is in square miles; for a radius in kilometres, square kilometres. Unit conversion uses the international statute mile: 1 mi = 1.609344 km, so 1 mi² = 2.58999 km². See methodology for the full unit constants.

Methodology & sources

Computed metrics. area = π·r², circumference = 2·π·r, reach = r. Unit conversion: 1 mi = 1.609344 km. Derived from user input alone — no external dataset needed for the four outputs.
Basemap. © OpenStreetMap contributors, used under the Open Database License (ODbL). Self-hosted vector tiles built from the Protomaps daily planet build; see /data-sources for the retrieval + rebuild details.
US city / ZIP search. SimpleMaps US ZIPs v1.95.1 (~41,500 records; five fields per row — ZIP, city, state, lat, lng, population — the rest of the dataset's ~90 columns are dropped). Loaded lazily on first focus of the search box; no external API calls at runtime.
150-air-mile short-haul citation. Verified against FMCSA 49 CFR 395.1(e) via eCFR (retrieved Aug 2026): 150 air miles = 172.6 statute miles.
Author. Marko Visic (MPharm, BSc Physics). See About.
Data as of. 2026-08-25 (matches the registry's verified_date on the basemap-tiles domain). Content updated. 2026-08-28.
Not yet computed on this page. Population inside the radius and drive-time isochrones are absent — their primary sources (US Census / WorldPop; a self-hosted routing engine) are in the data-sources registry as candidate / GAP and won't ship until they're verified end-to-end. Approximating either without verified inputs would produce numbers this site doesn't stand behind, per the verified-or-omitted rule.