One handles a doorsill; the other handles steps, and the slope rule decides which you need.
Verdict
Measure the rise first, then choose. A threshold ramp handles a doorsill or a raised transition of an inch or two. A folding portable ramp spans steps. The number that decides it is slope: ADA guidance for a ramp is a 1:12 gradient, meaning one foot of ramp for every inch of rise, so a 4-foot ramp is appropriate for about a 4-inch step and dangerous over a 10-inch one.
The single most common mistake with ramps is buying one that is too short. A steep ramp is hard to push up, hard to control coming down, and a real tipping risk in a wheelchair, particularly for someone self-propelling or using a mobility scooter.
The 1:12 rule is the accessible standard: one inch of rise needs one foot of ramp length. Some manufacturers suggest steeper ratios where an assistant is present, and going steeper is a trade against safety rather than a free choice.
| Nuvium Rubber Threshold Ramp | VNN 4 ft Folding Wheelchair Ramp | |
|---|---|---|
| Typical rise handled | 1 to 2 inches | Up to about 4 inches at 1:12 |
| Portable | Stays in place | Folds and carries |
| Indoor use | Yes | Usually too long |
| Non-slip surface | Yes | Yes |
| Weight capacity | Check the model | Commonly 600 to 800 lb |
| Typical price | About $34 | About $140 |
You are dealing with a doorsill, a raised threshold between rooms, or a small lip at a patio door. A rubber threshold ramp sits permanently in place, is often cuttable to the door width, and removes the jolt that catches castors and trips people using a walker. Check the rise against the ramp's rated rise, and make sure the door still closes over it.
Check Nuvium Rubber Threshold Ramp on Amazon
You are dealing with actual steps. Measure the total rise from the lower surface to the upper one and apply the 1:12 rule: a 4-foot ramp suits roughly a 4-inch rise. If the rise is 8 inches you need about 8 feet, and if it is a full flight you need a permanent installation and probably a contractor rather than a portable ramp. Check the weight capacity covers the person plus the chair plus anyone pushing.
Check VNN 4 ft Folding Wheelchair Ramp on Amazon
Too steep is the failure that matters. If you cannot fit a ramp long enough for the rise, the answer is a different entrance, a permanent ramp, or a platform lift, not a shorter ramp used carefully. Also check the landing at the top: there must be enough flat space to open the door and manoeuvre. Ramps need a non-slip surface, and they get slick in rain, frost and wet leaves, which is worth planning for. If your parent uses a mobility scooter, check the manufacturer's maximum ramp gradient, since some are lower than the ramp's rating.
The accessible standard is 1:12, meaning one foot of ramp per inch of rise. A 6-inch step needs about 6 feet of ramp. Steeper ratios are sometimes suggested where an assistant is always present, and that is a trade against safety rather than an equivalent option.
No. Threshold ramps are made for a rise of an inch or two, and using one on a taller step produces a slope far steeper than is safe. Measure the rise and buy for it, rather than buying for the space you would prefer to use.
Generally not. Medicare typically classifies ramps and other home modifications as not medically necessary durable medical equipment. Some Medicare Advantage plans, Medicaid waiver programmes, veterans' benefits and area agencies on ageing do help, so it is worth asking rather than assuming.
The person, plus the chair or scooter, plus anyone pushing, with margin. Power wheelchairs and mobility scooters are considerably heavier than manual chairs, often 200 pounds or more before the occupant, which catches people out.
Comparison based on published manufacturer specifications and the general consensus of owner reports. We have not tested these units side by side. Confirm current prices and specifications before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
We reviewed the individual products behind this comparison, including what each one does badly and who should not buy it. Most of this equipment should be specified by an occupational or physical therapist before it is bought.