A simple, step-by-step guide to measuring a doorway or step for a rubber threshold ramp, so you order the right size first time.
Ordering the right ramp starts with three good measurements. Get them right and your ramp will fit safely first time; get them wrong and you risk a slope that is too steep or a ramp that does not sit flush. Here is how to measure a doorway or step properly.
1. Measure the rise (height)
The rise is the vertical height from the lower floor to the top of the step or threshold. Rest a spirit level or straight edge on the higher surface and measure straight down to the lower floor. This single number is the most important, because it determines both the ramp height and how long the ramp needs to be.
2. Measure the width
Measure the clear width of the doorway or the path the user will travel. Your ramp should be at least as wide as the wheelchair, walker or trolley using it, with a little room to spare for confident, straight-line access.
3. Check the available depth
Depth is the floor space in front of the step where the ramp will sit. A gentler, safer gradient needs more depth, so make sure there is enough clear run-off without blocking a doorway swing or walkway.
Note the surroundings
Finally, sketch anything nearby that affects the fit, sliding-door tracks, skirting, drains, or corners. If the threshold is an awkward shape, a custom ramp can be made to suit rather than forcing a standard size to work.
With your rise, width and depth in hand, you can choose a standard ramp with confidence, or supply those figures for a custom one. When in doubt, measure twice.
Quick answers
What measurements do I need for a threshold ramp?
Three: the rise (height of the step), the width of the path, and the depth of clear floor in front of the step.
How do I measure the rise?
Rest a level or straight edge on the higher surface and measure straight down to the lower floor.
What if my threshold is an odd shape?
Supply the measurements and shape for a custom ramp made to fit tracks, corners or unusual openings.
Not sure which size you need? Send us your measurements and we will point you to the right ramp and your nearest stockist.
For more sizing and install help, see our frequently asked questions.