Metal Roofing Panel Calculator
Rib panels, total coverage and screws for a metal roof from eave length and slope length.
Order panels cut to the slope length plus 50 mm eave overhang — field-cutting steel kills coatings and warranties. Screws go in the flat, not the rib, on exposed-fastener profiles.
Formula
Metal Roofing Panel Calculator is a free metal roofing calculator for civil engineers, contractors and quantity surveyors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Metal Roofing Panel Calculator
Rib panels, total coverage and screws for a metal roof from eave length and slope length. The calculation implements panels/slope = ⌈eave ÷ net coverage⌉; cut length = slope + overhang (Metal Construction Association install guidelines). Order panels cut to the slope length plus 50 mm eave overhang — field-cutting steel kills coatings and warranties. Screws go in the flat, not the rib, on exposed-fastener profiles.
How to use Metal Roofing Panel Calculator
- 1Enter Eave length (per slope) in m.
- 2Enter Slope length (eave → ridge) in m.
- 3Enter Panel net coverage width in mm (36″ net is standard for ribbed panels).
- 4Enter Number of slopes.
- 5Read Panels, Coverage, Screws (≈17/m²) instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Metal Roofing Panel Calculator?
- ✓Implements the standard formula — panels/slope = ⌈eave ÷ net coverage⌉; cut length = slope + overhang
- ✓Reference cited on-page: Metal Construction Association install guidelines
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Metal Roofing Panel Calculator use?+
It computes panels/slope = ⌈eave ÷ net coverage⌉; cut length = slope + overhang, per Metal Construction Association install guidelines. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Order panels cut to the slope length plus 50 mm eave overhang — field-cutting steel kills coatings and warranties. Screws go in the flat, not the rib, on exposed-fastener profiles.
Does it include wastage?+
Yes — standard wastage/bulking factors are built in and stated in the formula line, so the quantity is an orderable number, not a bare geometric volume.
Is the Metal Roofing Panel Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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