Hello shibinbright, your calculator works apparently correctly.

 

Maybe you should add a little drawing for each pannel.

For example in the pannel : Slope I gradient, the distance is the HORIZONTAL DISTANCE and not the distance along the slope.

 

As I'm working 95% of my time on AutoCAD I use the block shown in the file uploaded.

I do the blocks on the 3D wireframe of the project and then use them in every file ( assembly, sub-assembly, details, etc...).

Eventually see my file FEET-METERS.dwg in the CAD/BIM Blocks library here in the site.

Have a nice day.

 

Calculate the SLOPE and GRADIENT at ease with this Application.

Comments and feed backs towards the improvement of the app are welcome with full warm-heartedness...!!

All comments are welcomed.