Stair Concrete Calculator

STRUCTURAL v1.0

Each triangular step volume = 0.5 x rise x run x stair width, summed across all steps plus any landing slab volume.

Civil & Structural Engineering Tools

Inputs

Results

Concrete Needed
0.26 cu yd
Volume per Step:1.069 cu ft
80-lb Premix Bags:12 bags

Each triangular step volume = 0.5 x rise x run x stair width, summed across all steps plus any landing slab volume.

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دليل خطوة بخطوة

1

Enter Step Geometry

Input riser height, tread run, stair width, and number of steps.

2

Add Landing Volume

Include any flat landing slab volume in cubic feet, or leave at 0.

3

View Concrete Order

Get total cubic yards and 80-lb premix bags needed, with waste applied.

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المساعدة ومركز المعرفة

الأسئلة الشائعة (10)

أسئلة وأجوبة شائعة حول هذه الأداة.

Each step approximates a triangular prism: 0.5 x rise x run x stair width, since the tread sits atop the sloped stringer void below it.
Comfortable, code-compliant residential stairs typically use a 7 in riser and 11 in tread, per the 2 x riser + tread ≈ 24-25 in rule of thumb.
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