- Ball radius calculated by volume
- Circular segment
Can calculate area, arc length,chord length, height and perimeter of circular segment by radius and angle.

- Cone development
Calculator of right circular cone / truncated right circular cone development

- Counting pipes from the end face
The approach to the calculation of the number of nested circles of smaller radius at a known length of the describing circle of a larger radius. Created by user request

This online calculator finds number of sides and length of side of regular polygon given the radii of incircle and circumcircle

- Pipe cold bending. Flexure depth with main shaft.
Calculates the section flexure depth with pipe bender or bending machine to obtain given parameters.

- Regular polygon. Incircle and circumcircle
This online calculator determines parameters of circumcircle and incircle of a regular polygon

- Side of regular polygon from polygon area
Calculates the side length of regular polygon given the area of the regular polygon and number of sides