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Ramp Step Calculator

Enter your lean. Get the exact ramp step — before you move an inch. Built for the standard Australian 3-step ramp, with jockey wheel travel included for caravans.

Your site & rig

Read it from any spirit-level app — or OzLevel's free tier gives you millimetres directly.

This calculator solves whichever axis is further off level. Solving both in one pass is the app's job.

Corrected by the jockey wheel — not ramps.

Generic Australian 3-step ramp
Step 1: 40mm · Step 2: 70mm · Step 3: 100mm
(40 + 30 + 30mm rises)

Different ramps? The OzLevel apps support your specific ramp profile — including 4-step ramps.

⭐ Pro — in the OzLevel app Off level on both axes? Dual-axis levelling solves roll and pitch in one sensor reading, gives every wheel its step, and lays out the staggered ramp placement so you drive on once.

Rear view — your rig right now

Your ramp step

Ditch the spirit level and the second app →

However you measured that lean, OzLevel does the measuring and the maths in one — both axes, your exact ramps, fully offline. Free trial, no hardware.

How this calculator works

What ramp does it assume?

A generic Australian 3-step levelling ramp with cumulative step heights of 40mm, 70mm and 100mm (rises of 40 + 30 + 30mm). If your ramps are different — including 4-step ramps — the OzLevel app supports your specific ramp profile.

Why did it suggest a lower step than I expected?

It picks the step closest to your required rise, not the next step up. Need a 46mm rise? Step 1 (40mm) leaves you 6mm off — within a practical level tolerance — while Step 2 (70mm) would overshoot by 24mm and leave you further off level the other way. This matches how the OzLevel app selects steps. Stackable blocks are different: with uniform blocks you round up, which is why our ramp blocks guide uses a different formula.

My motorhome is off level both ways. Which does this solve?

Whichever axis needs the greater correction in millimetres. Solving both in a single drive-on — with a step for every wheel and staggered ramp placement — is a dual-axis Pro feature in the OzLevel motorhome app. Our guide to laying out ramps at different heights explains the placement logic.

Do ramps fix a caravan's nose-down lean?

No. Ramps correct side-to-side lean while the van is still hitched. Front-to-back is the jockey wheel's job after unhitching — this calculator tells you how many millimetres of travel you need and which way to wind.