# Useful Calculations

On the utilities menu there is an option to make some calculations using equations useful in filament winding & composites.

The user enters the data in the boxes for the calculation required and then clicks the Calculate button to put the answer in the results box.

The calculations currently available are:

Calculate the Fibre Fraction By Mass from the fibre fraction by volume.

Calculate the Fibre Fraction By Volume from the fibre fraction by Mass.

For an axisymmetric body, calculate the geodesic fibre angle at a given mandrel diameter given the angle and diameter of another known point on the path. This uses the Clairault equation.

For an axisymmetric body, calculate the geodesic fibre diameter position for a particular wind angle given the angle and diameter of another known point on the path. This uses the Clairault equation.

We can add other calculations if required If there is an item you would like adding here then please Contact us. Details can be found in the Introduction to this help file.