Construction/ CALCULATOR
Roof covering area and pack estimate
Convert a simple horizontal roof footprint and pitch into sloping area, order area and whole packs.
Use the plan length covered by this consistent roof system.
Use the full horizontal footprint for a simple equal-pitch roof.
Use the verified pitch angle, not a visual estimate.
Subtract only the true uncovered area; curbs and flashing still require material.
Set from roof shape, sheet or tile module, laps and supplier guidance.
Use effective installed coverage after product laps, not raw sheet dimensions.
Horizontal plan area
80.00 m²
Gross sloping roof area
92.38 m²
Net covering area
90.38 m²
Area including allowance
99.41 m²
Estimated whole packs
42 packs
Effective coverage in whole packs
100.80 m²
A simple roof whose entire horizontal footprint has one entered pitch. Hips, valleys, dormers, unequal pitches, overhang changes, ridge and verge pieces, flashing, underlay, battens, fasteners, product layout and structural requirements need separate measurement. Declared pack coverage must already account for normal product laps.