Great Circle Distance Calculator
- Distance
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- In miles
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- In nautical miles
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Haversine formula. Defaults: JFK → LHR (~5,541 km).
About this tool
Great Circle Distance Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Travel — Practical. Browse more Travel — Practical tools.