Calculate Wheelchair Ramp Length Requirements (Option B) — Free
Ramps that are too steep are dangerous and unusable for manual wheelchair users. Calculate required ramp length from vertical rise and standard slope ratios. (Option B scope).
The proof surface
ADA accessibility guidelines specify a maximum 1:12 slope ratio. This calculates required ramp length for home entry steps. Optimized for option b workflow.
Why the flat version breaks
Building ramps steeper than 1:12 ratio
Steep slopes cause wheelchairs to tip backward or lose control downhill.
Forgetting resting landings on long ramps
Users need level 1.5-meter landings to rest on long inclines.
Ignoring slip-resistant surface treatments
Unfinished wood ramps become extremely hazardous when wet or icy.
How to work the ramp-length gauge
Measure exact vertical height from ground to threshold in cm.
Standard ratio is 1:12 (12 cm of run for every 1 cm of rise).
Ramps longer than 6 meters require intermediate resting landings.
Ensure property lines provide adequate space for required ramp runs.
What the ramp-length gauge replaces
| Question | Before | Visible working |
|---|---|---|
| Building ramps steeper than 1:12 ratio | Steep slopes cause wheelchairs to tip backward or lose control downhill. | Set slope ratio requirement |
| Forgetting resting landings on long ramps | Users need level 1.5-meter landings to rest on long inclines. | Set maximum ramp run section length |
| Ignoring slip-resistant surface treatments | Unfinished wood ramps become extremely hazardous when wet or icy. | Calculate total ramp length needed |
A local arithmetic aid replaces hand calculation, not expert review. No paid AI service is needed.
Run it on the samples, right here
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Dimensions arithmetic based on rise measurements and slope ratios. Not structural engineering advice.
Data note: Everything runs in this browser tab on the ramp-length gauge: your entrance step | vertical rise cm | slope ratio cm per meter stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Go deeper: the companion app files the same reading as a meter band gauge
The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the ramp-length gauge reading, and holds your drafts on this device — one free run, then $ 4 one-time for the layer that keeps filing.
The ramp-length gauge reading is complete for free. The optional $4 layer adds print, row CSV and the last five local reading summaries; it does not add hidden answers. Checkout is not configured yet; the article demo remains unlimited.
Open the calculate wheelchair ramp length requirements (option b) companionBoundary
Dimensions arithmetic based on rise measurements and slope ratios. Not structural engineering advice.
What this is built on
- Method: Ramps longer than 6 meters require intermediate resting landings.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-29, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Before: Steep slopes cause wheelchairs to tip backward or lose control downhill. After: the ramp-length gauge shows the working beside each named row so the reader can change the assumption and inspect the consequence.
Optional AI formatting, not calculation
For this ramp-length gauge, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a ramp-length gauge. Return plain rows only: entrance step | vertical rise cm | slope ratio cm per meter. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: entrance step | vertical rise cm | slope ratio cm per meter. No AI response is executed as code.