How to use
- Fill in: Total rise - height to climb (mm). Fields with defaults or marked optional can stay as shown.
- Tap Calculate Ramp.
- Read the result - you can print or save it as PDF.
Worked example
With Total rise - height to climb = 300:
MAXIMUM GRADIENT1 : 12
- Ramp run needed: 3.6 m for 300 mm rise
- Minimum clear width: 1,200 mm
- Landings required: None required by this band
- Handrails: Both sides, 850-950 mm high
Reference table: NBC 2016 Part 3 Annex B (accessibility), Table 10, with 1500 mm min landing length. That annex excludes private residences, vehicle ramps follow a different limit (max 1:8), and NBC 2016 is superseded by SP 7:2026 - confirm which rules your local bye-law adopts. This tool does the rise/run maths; it is not a compliance certificate.
