DraftCalc

DraftCalc is a focused blueprint-themed toolkit built for drafters, surveyors, builders, and design students who need quick and dependable drawing math on the job site or at the desk. The app bundles eight practical engineering calculators: a scale converter that translates any ratio between drawing and real-world lengths, a shoelace polygon calculator for area, perimeter, and centroid from coordinate points, a coordinate geometry module for distance, bearing, and polar setout, a triangle solver that handles SSS, SAS, ASA, and AAS inputs, an arc and curve helper for radius, chord, arc length, and sector area, a unit converter for length, area, and angle, a slope and grade tool that moves freely between rise, run, percent, angle, and ratio, and a line setout tool that generates every point along a divided or offset line. Every calculation uses standard geometric and surveying formulas, works fully offline with no account or subscription, and can be copied or saved to local history for later review.