Metal Roofing Calculator
Updated Formulas shown
Metal panels run eave to ridge, so you count panels across the eave. A 40 ft gable with 16 ft runs and 36 in R-panels needs 14 panels per side with 5% waste.
Metal panels
28
each 16 ft long
- Roof area
- 1,280 ft²
- Squares
- 12.8
- Screws (≈ 80 per square)
- 1,024
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Frequently asked questions
How much does a metal roof cost?
Exposed-fastener panels run about $5–$10 per ft² installed; standing seam $10–$18 per ft² in 2026.
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Estimates only. Check quantities with your supplier or contractor before ordering.