distance travelled along track divided by height lost, unpowered, in still air

Powered paragliders typically offer power off glide ratios in the 7 to 1 range. That means for every 7 feet you move forward, you drop one foot in altitude. This number will vary based on wing styles.

angle at which glider descends through air. Determined by how much lift and drag a particular wing produces.

The glide ratio is defined as the distance travelled in a horizontal direction compared with the vertical distance dropped on a normal glide. A 10 to 1 glide ratio means that the aircraft would loose one foot of altitude for every ten feet of distance traveled.

The distance a canopy flies forward compared to down. A canopy with a 3:1 glide ratio flies three feet forward for every foot of vertical descent.

the unpowered horizontal distance traveled relative to the amount of vertical drop; the average paraglider's glide ratio is 7:1, meaning it loses 1 foot of altitude for every 7 feet it glides horizontally in still air

Glide ratio, also called, Lift-to-drag ratio, glide number, or finesse,is an aviation term that refers to the distance an aircraft will move forward for any given amount of lost altitude (the cotangent of the downward angle).