Beam Angle / Throw Calculator

Calculate beam and field diameters from throw distance and angle, or work backwards from a desired coverage area. Includes side and front elevation diagrams.

Parameters

Throw Distance

Mounting Height

Focus Height

Beam Angle

50% peak intensity

Field Angle

10% peak intensity

Units

Metric Imperial

Fixture presets

Side Elevation

Floor Footprint

Results

Beam Diameter

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Field Diameter

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Beam Area

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Field Area

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Tilt Angle

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Horizontal Offset

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Reverse: Desired Coverage → Required Angle

Enter the coverage diameter you need and the throw distance to find the required beam angle.

Desired Diameter

Throw Distance

Required Beam Angle

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