Home & Construction
Ramp Length and Landing Calculator
Translate rise into minimum run, add a stated construction margin, split the run at the entered segment limit, add intermediate landing length, and compare the plan with available straight run.
Minimum slope-based run (mm)-
Run including entered margin (mm)-
Whole ramp-run segments-
Intermediate landings-
Run plus intermediate landings (mm)-
Available straight run minus minimum (mm)-
Available run per unit rise-
Ramp and intermediate landing area (m²)-
Decision view
Ramp run and landing footprint
Ramp run and landing footprintRise, slope-based run, construction margin, segments, landings, and total footprint remain distinct.
Exact scenario comparisonHorizontal run per unit rise changes while all other entered assumptions remain constant.
| Horizontal run per unit rise | Minimum slope-based run (mm) | Run including entered margin (mm) | Whole ramp-run segments | Intermediate landings | Run plus intermediate landings (mm) | Available straight run minus minimum (mm) | Available run per unit rise | Ramp and intermediate landing area (m²) |
|---|
How to use Ramp Length and Landing Calculator
- Measure finished-surface rise at the actual route.
- Enter only dimensions and slope criteria verified for the applicable code and site.
- Check the complete plan length, landing count, width, turning geometry, doors, and clearances with a qualified designer or authority.
Calculator guide
Understanding Ramp Length and Landing Calculator
Ramp planning begins with a vertical rise and an entered horizontal-run ratio, but the physical footprint must also include construction allowance, segmentation, intermediate landings, clear width, and available space.
Calculation method
How the calculation works
Multiply rise by an entered maximum slope ratio, add construction margin, split long runs into segments, and include intermediate landing footprint. Multiply rise by the entered run-per-rise ratio, apply the construction margin, round up the number of run segments, and add one intermediate landing between adjacent segments.
Site-fit review
What the dimension diagram cannot decide
A length that fits numerically may still fail as an accessible route.
Worked situations
Practical examples
- A nominal 1:12 criterion means 12 units of horizontal run per unit of rise.
- A run longer than the entered segment maximum is split and gains intermediate landing footprint.
- Positive available-run gap does not prove compliance because landings, turns, handrails, and doors need separate clearance.
Better inputs
Useful tips
- Use one unit system for every linear input.
- Measure from finished surface to finished surface.
- Reserve extra site space for transitions, edge protection, drainage, and construction tolerance.
Before relying on the result
Limitations and common mistakes
- The calculator does not determine legal compliance.
- Maximum rise, cross slope, landings at doors, turns, handrails, guards, edge protection, surfaces, and local exceptions are not solved.
- Irregular or switchback geometry requires a site plan.
Reference
Key terms
- Run-per-rise ratio
- Horizontal distance required for each unit of vertical rise.
- Run segment
- Continuous sloped section between landings.
- Intermediate landing
- Level platform inserted between adjacent ramp segments.
- Plan footprint
- Modeled run and intermediate landing area before site-specific clearances.
Important note
Calculated from the entered measurements and stated coverage or quantity rules. Confirm field dimensions, waste, product requirements, structural conditions, and local codes before purchasing or building.
Frequently asked questions
Does a positive run gap mean the ramp complies?
No.
Are top and bottom landings included?
Only intermediate landing length is added by this simplified footprint.
Why add a construction margin?
It is an entered planning allowance, not a code substitute.
Can this design a switchback ramp?
No, it does not place turns or landings on a site plan.