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Construction Tools
Calculators and utilities for the job site
Building Envelope
Evaluate your building envelope — air tightness, ventilation, and fresh air strategy — and see where your home lands on the health vs efficiency quadrant.
Fresh Air CalculatorIn Development
Size your balanced ventilation system (ERV/HRV) based on occupancy. Calculate supply and exhaust tube counts, design base flow, boost flow, and get Zehnder and Brink unit recommendations.
Volume Calculator by FramesIn Development
Calculate backfill volumes along a linear run using cross-section frames. Supports multiple materials with weight estimation.
Grade DifferentialIn Development
Set elevations across a grid, build multiple grade layers, and calculate cut & fill volumes between any two surfaces. Auto-interpolates unset points using inverse-distance weighting.
More tools coming soon. Have a suggestion? Let us know.