All charts ↓

The reference charts,
done right.

Clean, printable, searchable shop charts — the ones you keep open on the bench. No PDFs, no logins, no ten-year-old forum screenshots. Just the numbers, computed and correct.

PrintableMobile-friendlyLive calculatorsNo sign-up

Socket & Wrench Conversion

Metric ↔ SAE. The nearest socket for any size, and whether it's a safe swap.

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Drill Bit Size Chart

Fraction, number, letter & metric — with the closest bit in every system.

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Tap & Drill Size Chart

The right tap drill for every thread — plus a custom thread-% calculator.

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Bolt & Screw Size Chart

Thread, diameter, the wrench that fits, and how to read grade markings.

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Wire Gauge Chart (AWG)

Diameter, area, resistance & amp capacity — with a wire-size finder.

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Screw Head & Drive Types

Identify any drive (Phillips, Torx, hex…) and head shape at a glance.

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Wood Screw & Pilot Hole Chart

Gauge to diameter, plus the right pilot hole for soft & hardwood.

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Screw Size Guide

Which screw for which material — sizes, uses & how to measure.

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Allen Key Size Chart

Metric & SAE hex keys, and which key fits each socket screw.

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Nail Size Chart

Penny sizes decoded — 2d to 60d in inches & mm, with uses.

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Sandpaper Grit Chart

Which grit for which job, plus CAMI ↔ FEPA equivalents.

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Why this site exists. Every one of these answers is a fixed fact — a fraction, a gauge, a thread pitch. It should load instantly, print on one page, and work on a greasy phone in the garage. That's the whole idea: the reference you actually reach for, kept simple. More charts are on the way.