Measure distance between any points on a map
This free distance calculator measures the straight-line distance — "as the crow flies" — between any locations on Earth. Click the map to drop points and build a path with as many stops as you need: the tool shows the total length plus every individual segment, in kilometers, miles, or nautical miles.
Every measurement is a true great-circle distance computed on the Earth's surface, the same math used in aviation and marine navigation. Use it to estimate flight distances between cities, check how far two addresses really are, plan sailing legs, or sanity-check a route before you build it. When you're done, export the map with your measurements as a high-resolution PNG.
Frequently asked questions
How do I measure distance on a map?
Click anywhere on the map to drop a starting point, then keep clicking to extend the path. The total distance and each segment update instantly, and you can drag any point to adjust it.
What does "as the crow flies" mean?
It's the straight-line (great-circle) distance between two points — the shortest possible path over the Earth's surface, ignoring roads, terrain, and obstacles. This tool computes true great-circle distances, not flat-map approximations.
Can I measure in miles or nautical miles?
Yes. Switch between kilometers, statute miles, and nautical miles at any time — the totals and per-segment distances convert instantly.
How accurate is the distance measurement?
Distances use the haversine great-circle formula on the Earth's mean radius, which is accurate to within about 0.5% anywhere on the planet — more than enough for planning, logistics, and aviation estimates.