Stair Rail Calculator
Enter your size to get stair rail quantity, plus an estimated cost. Waste is included and prices are editable.
Size
Waste and price (optional)
$
Material needed
22 ftBuy this many
Estimated cost
Material cost$440
How to calculate stair rail
Stair rail sold by the foot. Enter rail length to get feet needed.
Formula: quantity = length × 1 × (1 + waste %) = 20 × 1 × 1.10 = 22 ft.
Worked example
Example: 20 ft long. Quantity: 22 ft, about $440 at $20 per ft.
Tips
Measure the full area, then subtract large openings if you want an exact count. Order a little extra for cuts and breakage, and confirm quantities with your supplier before you buy.
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Frequently asked questions
How much stair rail do I need?
Example: 20 ft long. Quantity: 22 ft, about $440 at $20 per ft.
How much waste should I add?
Add 10% for straight areas and 15% for areas with many cuts, corners and openings.
Are the prices accurate?
Prices are editable estimates. The defaults are typical US figures, and your local price can be higher or lower.