# Average Grade

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- | [[Image:Gradient4.PNG|'''[[Average Grade]]''' This is the average '''[[slope]]''' gradient (in percent) of the terrain under the length of the ski lift, from top terminal to '''[[bottom terminal]]'''.|thumb| | + | [[Image:Gradient4.PNG|'''[[Average Grade]]''' This is the average '''[[slope]]''' gradient (in percent) of the terrain under the length of the ski lift, from top terminal to '''[[bottom terminal]]'''.|thumb|400px]] |

- | '''[[Average Grade]]''' This is the average '''[[slope]]''' gradient (in percent) of the terrain under the length of the ski lift, from top terminal to '''[[bottom terminal]]'''. | + | '''[[Average Grade]]''' This is the average '''[[slope]]''' gradient (in percent) of the terrain under the length of the '''[[ski lift]]''', from '''[[top terminal]]''' to '''[[bottom terminal]]'''. |

Calculate slopes one must have some understanding of it. | Calculate slopes one must have some understanding of it. | ||

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# As a ratio of the rise to the run (for example 1 in 20) | # As a ratio of the rise to the run (for example 1 in 20) | ||

# As an angle (almost always in degrees) | # As an angle (almost always in degrees) | ||

- | # As a percentage called the "grade" which is the (rise ÷ run) * 100. | + | # As a percentage called the "'''[[grade]]'''" which is the (rise ÷ run) * 100. |

Of these 3 ways, slope is expressed as a ratio or a grade much more often than an actual angle and here's the reason why. | Of these 3 ways, slope is expressed as a ratio or a grade much more often than an actual angle and here's the reason why. | ||

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* '''[[grade]]''' = (rise ÷ slope length) * 100 | * '''[[grade]]''' = (rise ÷ slope length) * 100 | ||

- | == Also see == | + | == '''Also see''' == |

*'''[[Slope]]''' | *'''[[Slope]]''' | ||

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*'''[[Mountain]]''' | *'''[[Mountain]]''' | ||

*'''[[Grade]]''' | *'''[[Grade]]''' | ||

+ | *'''[[Aerial Course Specification]]''' | ||

+ | *'''[[Mogul Course Specification]]''' | ||

*'''[[Average Width]]''' | *'''[[Average Width]]''' | ||

*'''[[Mountain master planning process]]''' | *'''[[Mountain master planning process]]''' | ||

*'''[[Maximum Grade]]''' | *'''[[Maximum Grade]]''' | ||

+ | *'''[[Application for Freestyle Course Homologation]]''' | ||

+ | *'''[[Freestyle Course Homologation Program]]''' | ||

+ | *'''[[Trail designation system]]''' | ||

+ | *'''[[Green circle]]''' | ||

+ | *'''[[Blue Square]]''' | ||

+ | *'''[[Black diamond]]''' | ||

+ | *'''[[Double black diamond]]''' | ||

+ | *'''[[Terrain park]]''' | ||

+ | *'''[[Skier Rider Ability Level]]''' | ||

- | == Reference == | + | == '''Reference''' == |

* 1728 Software Systems ''Slope of a Road or the "Pitch'' of a Roof [http://www.1728.com/gradient.htm] | * 1728 Software Systems ''Slope of a Road or the "Pitch'' of a Roof [http://www.1728.com/gradient.htm] |

## Current revision

** Average Grade** This is the average

**slope**gradient (in percent) of the terrain under the length of the

**ski lift**, from

**top terminal**to

**bottom terminal**.

Calculate slopes one must have some understanding of it.

**Slope**, **tilt** or **inclination** can be expressed in three ways:

- As a ratio of the rise to the run (for example 1 in 20)
- As an angle (almost always in degrees)
- As a percentage called the "
**grade**" which is the (rise ÷ run) * 100.

Of these 3 ways, slope is expressed as a ratio or a grade much more often than an actual angle and here's the reason why.

Stating a ratio such as 1 in 20 tells you immediately that for every 20 horizontal units traveled, your altitude increases 1 unit.

Stating this as a percentage, whatever horizontal distance you travel, your altitude increases by 5% of that distance.

## [edit] **Also see**

**Slope****Grade****Inclinometer****Mountain****Grade****Aerial Course Specification****Mogul Course Specification****Average Width****Mountain master planning process****Maximum Grade****Application for Freestyle Course Homologation****Freestyle Course Homologation Program****Trail designation system****Green circle****Blue Square****Black diamond****Double black diamond****Terrain park****Skier Rider Ability Level**

## [edit] **Reference**

- 1728 Software Systems
*Slope of a Road or the "Pitch*of a Roof [1]

Return to **Ski lift**, **Ski Related Definitions**, **Freestyle Equipment Rules**, **General Definitions** or **Freestyle Skiing**