Free Resources / Sqratch Tools
THE STUDIO MATH, DONE.
25 free calculators for the numbers every project starts with, and 3 design apps that run entirely in your browser. No sign-up, no spreadsheet, no guessing.
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Standards & Library
Universal Design Library
Quick-reference values for accessible architecture: ramp gradients, wheelchair clearances, washroom dimensions. Rounded reference figures with the codes to verify against.
How These Are Built
Every tool runs on definitional math and published standards only: exact unit definitions, ISO 216 sheet sizes, plain geometry. Where a value depends on your city (FSI, setbacks, riser limits), we make it an input and tell you where to find it, instead of baking in a number that could be stale. Each tool states its basis and assumptions on the page.