ramp gradient calculator — the short version

Every Ramp Gradient Calculator on this page runs the same ramp gradient calculator logic a chartered accountant or coursework tutor would scribble on the back of an envelope — just faster, and reproducible.

Ask five websites for the same ramp gradient calculator and you get five answers — usually because each one rounds differently. Ramp Gradient Calculator holds four decimals internally and only rounds when it prints.

Buying a bag of concrete short is not a tragedy — buying five bags over is money gone. Add 10% for waste unless you enjoy a second trip to the builder’s merchant — then size it up and the rest of this page explains what the answer means.

UK Part M requires no steeper than 1:15 on a ramp up to 5 m long (6.67%) and 1:12 (8.33%) on short ramps — wheelchair users need gentler gradients on longer runs.

On this page you will see Architecture & Construction, GOV.UK Building Regulations and RIBA treated as first-class terms — each one is linked to the calculators and references that use it, so you can follow the thread without retyping queries into a search bar.

The formula we run is Gradient ratio = rise / run · % = (rise / run) × 100. You'll see each term laid out in the worked example below.

Looking for context? The Architecture hub lists every related tool, and the Water Tank Volume Calculator pairs naturally with this one for a second sanity check against the full calculadora directory.

A worked example, step by step

An example grounded in actual architecture figures beats a generic one every time:

UK Part M requires no steeper than 1:15 on a ramp up to 5 m long (6.67%) and 1:12 (8.33%) on short ramps — wheelchair users need gentler gradients on longer runs.

Every run comes back to Gradient ratio = rise / run · % = (rise / run) × 100 — change the inputs, the structure of the answer stays.

Moments this tool earns its keep

Ramp Gradient Calculator is aimed at people arriving with questions like these:

"Ramp gradient Part M"
"Wheelchair ramp slope"
"Accessible ramp UK"
"What is ramp gradient calculator"
"How to calculate ramp gradient calculator"
"Ramp gradient calculator formula"

Where the number stops being useful

Every tool has an edge where it stops being the right answer. Ramp Gradient Calculator is no exception:

For legally binding tax or medical decisions — cross-check with HMRC, NHS or a qualified professional.
For very large or very small extremes the rounding error outgrows the useful precision.
When the underlying rate or threshold has changed since the page was last reviewed — always verify with the primary source.
When the input you have is already a derived figure (net of something) — feeding it in as "gross" will double-subtract.

Five things that trip everyone up

Every time you size it up for a new scenario, one of these creeps in — it's worth knowing them ahead of time.

Misreading the unit in the label — 'per year', 'per month' and 'per day' versions of the same figure differ by 12× or 365×.
Taking a ratio and multiplying it by the wrong side of the inputs — always write the ratio as A/B with labels before running.
Trusting a screenshot of someone else’s calculation — rerun it yourself with the same inputs, numbers drift.
Assuming percentages add up. 10% off then 10% more is not the original price — it is 99% of it.
Not refreshing the page when thresholds are date-sensitive. If the page was cached yesterday, bank rates may already be yesterday’s.

The sources behind the numbers

Where the maths needs an external authority, we cross-check against:

GOV.UK Building Regulations
RIBA
Equality Act 2010

Works well alongside

If this question keeps coming up for you, the same cluster of tools usually comes next:

Water Tank Volume Calculator — Work out the capacity of a rectangular or cylindrical water tank in litres, cubic metres and gallons.

How we keep this accurate

Our calculadoras run on pure, unit-tested functions — the same logic lives in the browser and in the CI test suite. When tax rates, thresholds or official figures move, the update lands within 24 hours of the announcement. You can read the editorial policy and corrections policy.

Found an out-of-date number on Ramp Gradient Calculator or anywhere else in the Architecture toolkit? Send it to the editorial desk and we'll patch it. Or browse the full calculadora directory for the next tool you need.

Frequently asked questions

Ramp gradient Part M?

The useful way to think about it: feed the figures into the Ramp Gradient Calculator widget and it'll show the working. Calculate ramp gradient as a ratio, percentage and angle, with UK Building Regulations Part M compliance flags. UK Part M requires no steeper than 1:15 on a ramp up to 5 m long (6.67%) and 1:12 (8.33%) on short ramps — wheelchair users need gentler gradients on longer runs.

Wheelchair ramp slope?

Cutting to it, the underlying formula is **Gradient ratio = rise / run · % = (rise / run) × 100**. UK Part M requires no steeper than 1:15 on a ramp up to 5 m long (6.67%) and 1:12 (8.33%) on short ramps — wheelchair users need gentler gradients on longer runs.

Accessible ramp UK?

Short answer: this question usually arrives alongside Water Tank Volume Calculator. The Ramp Gradient Calculator handles the specific case above; the others cover adjacent ground.

What is ramp gradient calculator?

Quick version: every figure is cross-checked against GOV.UK Building Regulations and the wider data. If you notice a stale rate, email the editorial desk and we'll patch it in under 24 hours.

How to calculate ramp gradient calculator?

Practically speaking, yes, everything runs in your browser. No inputs are sent to our servers or any third party, nothing is logged and nothing persists after you close the tab.

Ramp gradient calculator formula?

Here's the plain-English summary: Ramp Gradient Calculator is free to use, free to share and free to embed — pass the URL around a class, a slack channel or a family chat. The editorial policy covers attribution.

Ramp gradient calculator example?

In one line: the short method: write the inputs in the units shown, run the calculation, then sense-check the answer against an order-of-magnitude estimate in your head.

Ramp gradient calculator worked example?

Put simply, if the result surprises you, run it a second time with slightly different inputs — small swings often reveal a unit or rounding issue in the original figures.

Ramp gradient calculator explained?

The direct take: a calculadora is a sanity check, not a verdict. For anything legally binding — contracts, tax filings, medical decisions — bring the figure to a qualified professional as a starting point.

Ramp gradient calculator definition?

Straightforward answer: Calculate ramp gradient as a ratio, percentage and angle, with UK Building Regulations Part M compliance flags. The page walks through the method in full so you can answer follow-up questions without guessing.

Ramp gradient calculator meaning?

Without the jargon, open the Ramp Gradient Calculator widget at the top of the page. Calculate ramp gradient as a ratio, percentage and angle, with UK Building Regulations Part M compliance flags. UK Part M requires no steeper than 1:15 on a ramp up to 5 m long (6.67%) and 1:12 (8.33%) on short ramps — wheelchair users need gentler gradients on longer runs.

Ramp gradient calculator step by step?

Tldr: open the Ramp Gradient Calculator widget at the top of the page. Calculate ramp gradient as a ratio, percentage and angle, with UK Building Regulations Part M compliance flags. UK Part M requires no steeper than 1:15 on a ramp up to 5 m long (6.67%) and 1:12 (8.33%) on short ramps — wheelchair users need gentler gradients on longer runs.

How it works