Total fall and grades. Inches per foot 

thanks

the videos actualy realy good not to complex and the camera bairly moves i like it

Way to over complicate things. Just take your length and multiply by .25. Way less steps. Same answer.

👍🏻

This is for a 2% fall right what about a 3%fall

You film this with a GoPro?

Am more confused bro explain yourself