Map Radius Calculator 2026
Instantly calculate the area and perimeter of a map radius. Perfect for defining delivery zones, travel times, signal coverage, and catchment areas.
Radius Specifications
Enter your distance and select units to calculate coverage
The straight-line distance from the center point to the edge.
Coverage Results
Area, perimeter, and map statistics
Enter your radius and click Calculate Map Radius to see the coverage area.
Common Travel Distances & Areas
Approximate radii and coverage areas based on average travel speeds. Useful for planning delivery zones, commute times, and local amenities.
| Travel Mode | Time | Approx Radius | Area Covered |
|---|---|---|---|
| Walking | 5 mins | 0.4 km (0.25 mi) | 0.5 km² (0.2 sq mi) |
| Walking | 15 mins | 1.2 km (0.75 mi) | 4.5 km² (1.7 sq mi) |
| Cycling | 15 mins | 4.0 km (2.5 mi) | 50.3 km² (19.4 sq mi) |
| Driving | 15 mins | 10.0 km (6.2 mi) | 314.2 km² (121.3 sq mi) |
| Driving | 30 mins | 25.0 km (15.5 mi) | 1,963.5 km² (758.1 sq mi) |
| Driving | 1 hour | 50.0 km (31.1 mi) | 7,854.0 km² (3,032.4 sq mi) |
Map Radius Calculator FAQ
Everything you need to know about calculating map radii, from basic geometry to real-world travel zones.
To calculate the area covered by a map radius, use the formula for the area of a circle: A = π × r². First, ensure your radius (r) is in the desired unit (e.g., kilometers or miles). Multiply the radius by itself, then multiply by Pi (approximately 3.14159). For example, a 10 km radius covers 3.14159 × 10² = 314.16 km².
The average walking speed is about 5 km/h (3.1 mph). Therefore, a 15-minute walk covers a distance of approximately 1.25 kilometers (0.75 miles). This means a 15-minute walking radius from a central point covers an area of roughly 4.9 square kilometers (1.9 square miles).
A 10-mile radius covers an area of approximately 314.16 square miles. This is calculated using the formula A = π × r², where r = 10. So, 3.14159 × 10² = 314.16 mi². This is a massive area, roughly the size of the state of Rhode Island!
Yes, for very large radii (typically over 100 km or 60 miles), the Earth’s curvature means the surface is spherical, not flat. Standard flat-earth geometry (A = π × r²) becomes slightly inaccurate. For precise calculations over large distances, geodesists use the Haversine formula or spherical geometry to account for the Earth’s curvature.
To draw a radius on a digital map, you can use GIS software or online mapping tools like Google Maps, MapQuest, or specialized radius mapping tools. Simply enter a central address or coordinates, input your desired distance (radius), and the tool will generate a circle representing that boundary. This is commonly used for delivery zones, school catchment areas, and real estate analysis.