Straight-Line Distance Calculator
Compare two coordinate pairs using great-circle distance in kilometers and miles.
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Distance & geography
Understand coordinates and geographic scale before checking real routes.
Start with a tool
Understand the decisions
Distance & geography
What straight-line travel distance can and cannot tell you
Interpret great-circle distance without mistaking it for a real route.
Distance & geography
Latitude and longitude: entering coordinates without swapping them
Validate coordinate order, signs and decimal format.
Distance & geography
Kilometers and miles: comparing travel distances consistently
Convert and label distance units accurately for planning comparisons.
Distance & geography
Checking the geographic spread of a multi-stop itinerary
Compare pairwise geographic legs without pretending they form a usable route.