GQ Calc

GQ Calc provides fifty free, online material calculators for construction and renovation projects, covering concrete, masonry, landscaping, drywall, flooring, lumber, and roofing.

• Transparent calculations that show net quantity, waste allowances, and package rounding.
• Supports both US and metric units with editable assumptions (density, yield, coverage).
• Each calculator breaks down results into whole bags, sheets, or rolls, helping users order with confidence.

Targeted at contractors, DIYers, architects, and anyone needing quick, reliable material estimates, GQ Calc eliminates guesswork and reduces costly over‑ or under‑ordering.