Ramp Slope Calculator
Calculate ramp slope percentage, rise-to-run ratio, angle, required run for a target ratio, sloped length, surface area and material cost.
Default project preview
8.33 %
Required target run
30 ft
Run margin
+0 ft
Sloped ramp length
30.1 ft
Surface order area
154.5 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Slope percent = rise ÷ horizontal run × 100. Ratio = run ÷ rise. Required run = rise × target ratio. Sloped length uses the Pythagorean theorem.
FAQ
Ramp Slope Calculator questions
What does a 1:12 ramp ratio mean?+
It means 12 units of horizontal run for every 1 equal unit of vertical rise.
Is the sloped length the same as horizontal run?+
No. The sloped surface is slightly longer because it follows the hypotenuse.
Does this confirm accessibility compliance?+
No. Compliance also depends on landings, handrails, clear width, cross slope, edges and jurisdiction-specific rules.