Angle of Elevation Calculator

This angle of elevation calculator works out the angle you look up through to see a point above you, using only the horizontal distance to that point and the vertical height difference between your eye level and the point. It matters whenever you need a sight line angle rather than a raw measurement: surveyors setting out levels, builders checking roof pitches or ladder angles, navigators judging bearings, and students working through right angle triangle trigonometry. Enter the horizontal distance and the vertical height into the two fields above, and the calculator instantly returns the angle of elevation in degrees, the same angle in radians, and the line of sight distance, the straight hypotenuse length between you and the point. It treats your two measurements as the shorter sides of a right angled triangle, with the height as the side opposite the angle and the distance as the side adjacent to it, so the tangent of the angle equals height divided by distance, and the angle itself is the arctangent of that ratio. The worked example below shows a distance and height of 10 each giving a clean 45 degree angle, so you can check the calculator against your own numbers. Because the maths assumes level ground and a true right angle, the accuracy of your result depends entirely on how precisely you measure the distance and height you enter.

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