Free stair carpet calculator estimates how much carpet you need based on tread depth, riser height, stair width, and overlap. Get instant results in m² or ft² with accurate measurements.
Total carpet needed:
0 m²
This covers carpet for each tread (horizontal surface), riser (vertical face), and overlap around the stair nose.
Formula: 12 stairs × [229 × (64 + 46 + 8)] = Total area needed
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