📐 Concrete Ramp Calculator
🌍 Professional ramp design tool — Calculates slope ratio, ramp length, concrete volume (yd³ / m³), cost estimate, and visual graph.
Compliant with USA (ADA 1:12 max) and international standards (EU, UK, AU, Canada). Input rise, choose slope or run, add width/thickness, get instant results.
📏 RAMP PARAMETERS
📐 Slope Ratio Mode
📏 Horizontal Run Mode
📏 ≈ 15.2 cm
📏 ≈ 91.4 cm
📏 ≈ 10.2 cm
📊 RESULTS & GRAPH
Slope Ratio
1:12.0
Slope %
8.33%
Angle (degrees)
4.76°
Horizontal Run
72.0 in
Ramp Length (inclined)
72.3 in
Concrete Volume
0.45 yd³ / 0.34 m³
Total Cost (est.)
$67.50
⚠️ Slope within ADA limits (≤ 1:12). ✅
🌎 Global & USA Standards: • USA (ADA): 1:12 max (8.33%) • UK DDA: 1:12 • EU: 1:12 max • Australia AS1428: 1:14 preferred • Canada: 1:12. Always design within local codes. Ramp concrete volume based on uniform thickness slab.
📘 Factor insights (USA & worldwide)
⬆️ Rise
Vertical height change. ADA max rise per run without landing: 30 inches. Worldwide depends on building type.
Vertical height change. ADA max rise per run without landing: 30 inches. Worldwide depends on building type.
📐 Slope Ratio
1:12 = every 12″ horizontal for 1″ rise. Steeper slopes require handrails & special design.
1:12 = every 12″ horizontal for 1″ rise. Steeper slopes require handrails & special design.
🧱 Concrete Volume
Based on inclined length × width × thickness. Provides yd³ for ordering ready-mix concrete.
Based on inclined length × width × thickness. Provides yd³ for ordering ready-mix concrete.
📈 Slope %
Rise/run ×100. 8.33% = 1:12. US federal standard max for accessible routes.
Rise/run ×100. 8.33% = 1:12. US federal standard max for accessible routes.