The straight-line distance between two places, with a realistic road-distance estimate alongside.
How this tool works
The as the crow flies figure is the exact great-circle distance between your two points. The road figure is an estimate: real road networks average roughly 18% to 40% more than the straight line depending on terrain and geography, so the tool shows the straight-line distance plus a typical 25% detour as a rule-of-thumb driving figure. It is an estimate for orientation, not a routed driving distance.
What you can do with it
- See how much longer the road is than the straight line for any pair of places
- Get a quick realistic driving estimate without a routing service
- Use the detour factor idea to sanity-check distances in articles and datasets
- Measure over water and terrain where no road exists at all
Why use it
Straight-line and driving distance answer different questions, and confusing them causes real planning errors. Showing both, with the estimate clearly labeled as one, keeps the comparison honest.
Data sources and methods
Related tools
These tools are provided for educational and informational purposes only. Results are computed from simplified public data and standard formulas, and may differ from surveyed or official values. No warranty is given as to accuracy or completeness, and the tools should not be relied on for navigation, legal, or commercial purposes.