Engineering Reference

Tools for people who read drawings.

Tolerance calculators, converters, and decoders. Accurate values from the source standards, no signup, built for the quality bench.

Dock Float Calculator

Floating-dock flotation: dead- and live-load freeboard on the deck-top datum, draft, pass/fail against your spec, and the float count that passes.

Slope at low water as 1:N, grade and degrees, the length full 1:12 needs, and which ADA gangway exception (80 ft, small facility) applies.

Plate, bar, tube, or hex in nine materials: weight per piece and batch in kg and lb, plus material cost from your price per kg.

Machine rate, cycle time, setup amortized over the batch, material, tooling, and margin: the per-part arithmetic of a machining quote.

Nominal dimension plus class (f, m, c, v) to the exact permissible deviation, with ISO 2768-2 geometrical tolerances.

Any hole and shaft class pair (H7/g6, H7/p6, H8/f7) to exact limits, deviations, and the fit type with its range.

2 × √(x² + y²) from measured X and Y deviation, MMC bonus tolerance, pass or fail against the callout, with a zone diagram.

The H7 hole tolerance for every bore size from 0 to 500 mm, with worked examples and inspection notes.

Ra, RMS, and Rz across µm and µin, the nearest ISO N grade, and the machining process that typically produces it.

HRC, HV, and HB for steel, interpolated from the standard ASTM E140 style correlation, HRC 20 to 68.

Paste 1/4-20 UNC-2B or M8x1.25-6H and get diameter, pitch, tap drill, and what the class means.

Quotes per month, order value, and price variance to what inconsistent quoting costs you per year.

Every dimension, GD&T frame, fit class, thread, and note, interpreted and ballooned into an AS9102 Form 3 in minutes.

First drawing is free · No signup