Specifier Tools

Shading Coefficient Calculator

Convert a glazing SHGC and an added shading device into a shading coefficient (SC) and the effective solar gain of the combined assembly.

Assembly Inputs

No. 04

Glazing SHGC 0 – 1

SHGC

Solar Heat Gain Coefficient of the glass alone, 0–1 (from the glass datasheet). 3 mm clear reference glass ≈ 0.87.

Enter an SHGC between 0 and 1.

Shading device Solar factor

Typical solar factor (multiplier applied to the glass SHGC). External devices intercept sun before it enters the glass, so they perform best.

Recalculates live as you adjust

Effective shading coefficient (with device)

0.69 SC

No shading device selected — this equals the bare glazing shading coefficient.

Transmitted

69%

Blocked

31%