FRP Weight Calculator
Estimate fiberglass or carbon composite weight using the transparent relation mass = density × volume. Use supplier-confirmed density and the net section area for purchasing.
How to calculate FRP weight
Convert the cross-sectional area to square metres, multiply it by length to obtain volume, then multiply by density in kilograms per cubic metre. A 100 mm × 10 mm solid profile has an area of 1,000 mm², or 0.001 m². At 1,850 kg/m³, one metre is approximately 1.85 kg.
Published density values are useful estimates, not acceptance values. Glass content, resin, fillers, veil and voids change mass. Hollow profiles also have radii, wall variation and internal webs that a simple rectangle or tube cannot capture. For freight, add packaging and use the supplier's measured linear mass from an approved production sample.
This FRP weight calculator does not check strength, deflection, stability, fire, connections or code compliance. Use project calculations and current supplier data before design or purchase.