1:15 Ramp Length Calculator
Many commercial and government buildings are now asking that ramps have a 1:15 slope for all permanent ramps. This calculator provides the ramp length needed for the rise or elevation you input based on a 1:15 slope.
Most building codes still require a minimum slope of 1:12 and you can use our 1:12 calculator for these ramps.
The permanent ramp result in the calculator below meets or exceeds most building and accessibility codes in Canada and the ADA requirements for the USA.
Be aware that many wheelchair and scooter manufacturers advise the maximum slope their products can safely negotiate. For safety, do not exceed these recommendations.
*Please note that ramps cannot have any continuous sections more than 30 feet long.
For ramps more than 30 feet long level landings must be added as needed to meet this standard (eg. A 45 foot ramp would need one landing no more than 30 feet from each end. A 90 foot ramp would need two landings 30 feet apart).
Level turns count as landings.
For more information on ramp slopes please visit our ramp slope page