Why 40°26′46″ and 40.4461 are the same place, how far a degree really is, and the area inside your fence — free geo tools.
Great-circle distance between any two lat/long points — km, miles and nautical miles, with the initial bearing thrown in.
40°26′46″N to 40.4461 and back — both directions of the coordinate-format conversion every GPS, map and dataset eventually demands.
Latitude/longitude into UTM zone, easting and northing — the metre-gridded coordinates surveyors, soldiers and field scientists actually measure in.
Initial and final bearings between two coordinates — why they differ on a round Earth, plus the compass-rose name of your heading.
Paste a list of lat/long corners → field area in hectares, acres and m² by spherical polygon math, plus the perimeter walked.
How many kilometres is one degree — of latitude (almost constant) and longitude (shrinks to zero) — at any latitude on Earth.
Centre + radius → the circle's area, the lat/long bounding box for your database query, and the degree-deltas that make radius search fast.
Where do you end up? Start coordinates, a bearing and a distance → the destination lat/long, by exact great-circle math.
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