Roof Wind Uplift Calculator
Net uplift on a roof area and the hold-down each fastener row must resist.
Light steel roofs WEIGH almost nothing — uplift rules their design. Corner zones see double the field suction, which is why sheets peel from the corners first in every cyclone video.
Formula
Roof Wind Uplift Calculator is a free wind uplift roof for structural engineers, fabricators and site engineers — 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 Roof Wind Uplift Calculator
Net uplift on a roof area and the hold-down each fastener row must resist. The calculation implements uplift = (p_z·C_p,net − DL)·A (IS 875 Part 3 — C_pe tables). Light steel roofs WEIGH almost nothing — uplift rules their design. Corner zones see double the field suction, which is why sheets peel from the corners first in every cyclone video.
How to use Roof Wind Uplift Calculator
- 1Enter Design wind pressure p_z in kN/m².
- 2Enter Net uplift coefficient (C_pe−C_pi) (Edges/corners up to 1.7–2.0).
- 3Enter Roof area considered in m².
- 4Enter Roof dead weight in kN/m² (Sheet+purlin ≈ 0.10–0.20).
- 5Read Net uplift force, Net pressure after dead weight instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Roof Wind Uplift Calculator?
- ✓Implements the standard formula — uplift = (p_z·C_p,net − DL)·A
- ✓Reference cited on-page: IS 875 Part 3 — C_pe tables
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Roof Wind Uplift Calculator use?+
It computes uplift = (p_z·C_p,net − DL)·A, per IS 875 Part 3 — C_pe tables. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Light steel roofs WEIGH almost nothing — uplift rules their design. Corner zones see double the field suction, which is why sheets peel from the corners first in every cyclone video.
Can I use this for real structural design?+
It implements the exact textbook/code formula cited below the result and is ideal for sizing, checking and learning. Final designs should be verified by a qualified engineer against the full code with all load cases.
Is the Roof Wind Uplift 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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