Deck Stair Calculator
Calculate stair stringers, treads, and dimensions based on total rise.
Utilisez des decimales si necessaire. Cette estimation se met a jour en direct et peut etre ajustee en toute securite avant l'achat.
Deck Stair Buying Guide
This guide helps you turn your deck stair calculator result into a cleaner purchase plan. Use it when you want fewer return trips, better waste assumptions, and a more realistic cart.
Step 1: Measure total rise perfectly
The 'total rise' is the exact vertical distance from the lower floor to the upper floor. Even a 1/4-inch mistake will result in uneven, dangerous steps.
Step 2: Obey the 7-11 rule
Most building codes mandate that a step's rise should be no more than 7.75 inches and the run (tread depth) should be at least 10 or 11 inches.
Step 3: Buy pre-cut vs uncut stringers
For standard deck heights, you can buy pre-cut pressure-treated stringers. For custom heights, you must buy 2x12 lumber and cut the zig-zag pattern yourself.
Stair cost planning rule of thumb
In addition to stringers, treads, and risers, budget for heavy-duty metal stringer hangers, structural screws, and a handrail system.
Understanding the Math
Formula: The basic formula for Deck Stair Calculator typically involves calculating the total area or volume (Longueur × Largeur × Depth) and dividing by the coverage of a single unit or package, then adding a waste factor (usually 10%).
Example: For example, if you have a 10x10 area and your material covers 10 square feet per unit, you need 10 units. With a 10% waste factor, you should purchase 11 units to ensure you don't run short.
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FAQ Deck Stair Calculator
Faut-il arrondir avant d acheter ?
Oui. Une petite marge couvre les coupes, la perte et les ajustements de derniere minute.
La disposition influence-t-elle la perte ?
Oui. Les plans simples demandent moins de marge, tandis que les angles, motifs et obstacles en demandent davantage.