Distance to Object (Angle + Height)

distance = height / tan(angle). Range from observer to base of object.

Inputs

Result

Horizontal distance
173.21 ft
Line of sight: 200.00 ft.
  • Object height100 ft
  • Angle30°
  • Distance173.2051 ft
  • Line of sight200.0000 ft

Step-by-step

  1. tan(30°) = 100 / d.
  2. d = 100 / tan(30°) = 173.205 ft.

How to use this calculator

  • Enter object height + measured angle of elevation.

About this calculator

Range from observer to base of object using elevation angle + known object height. Standard hypsometer / clinometer calculation. Useful for sniper rangefinding (with known target height), naval gunnery (mast height), surveying (distant landmarks). Light refraction matters at long range; assume straight-line for distances < 5 miles.

Frequently asked

Subtract eye height from object height for accurate distance. 6 ft observer measuring 100 ft tower: use 94 ft.

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