Fabric calculator

Fabric GSM (weight based)

Calculate GSM from a fabric sample weight and its dimensions.

Calculated GSM

Method and formula

\begin{aligned} \text{GSM (Circle)} &= \frac{\text{Weight (g)}}{\pi \times \left(\frac{\text{Dia (mm)}}{2 \times 1000}\right)^2} \\[1em] \text{GSM (Square)} &= \frac{\text{Weight (g)}}{\left(\frac{\text{Length (mm)}}{1000}\right)^2} \\[1em] \text{GSM (Rectangle)} &= \frac{\text{Weight (g)}}{\left(\frac{\text{Length (mm)}}{1000}\right) \times \left(\frac{\text{Width (mm)}}{1000}\right)} \end{aligned}

Variable	Expected entry
Weight (g)	Enter a positive measured value.
Fabric shape	Choose: Circle, Square, Rectangle
Diameter / length (mm)	Enter a positive measured value.
Width (mm)	Enter a positive measured value.