Every contractor laughs at stair quotes — because that's where costs quietly triple. This calculator strips away every hidden line item before you open your wallet.
🪜 Know Your Real Number. Zero Surprises.
🪜 Stair Configuration
Count each individual step from bottom to top landing.
Horizontal surface you step on. Standard: 10–11 in.
Side-to-side measurement of the staircase.
Vertical face between steps. Standard: 7–7¾ in.
How far the tread overhangs the riser below. Typically ¾–1¼ in.
🪵 Flooring Material
⚙️ Include in Estimate
📐 Live Anatomy Preview
⚡ Complexity Score—
SimpleModerateComplexExpert
📋 Full Material Breakdown
Line Item
Qty
Unit Cost
Subtotal
TOTAL PROJECT COST
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Your breakdown appears here
Fill in your stair dimensions and material on the left, then hit Reveal My True Stair Cost.