Reference charts that are actually searchable
33 tools — 30 lookup tables and 3 calculators covering wire gauges, abrasives, fasteners, machining, hardness, pipe and textile sizes. Every table supports instant search, and the numbers come from published standards rather than copied blog posts.
Electrical
AWG to mm Calculator
Convert between AWG, millimetres, inches and cross-sectional area — both directions.
ElectricalAWG Wire Gauge
Diameter in inches and mm, plus cross-sectional area, AWG 40 to AWG 0.
ElectricalFuse & Breaker Amp Chart
Standard fuse and breaker ratings with the minimum copper wire size.
ElectricalCable Ampacity (NEC 310.16)
Copper and aluminium ampacity in the 60, 75 and 90 °C columns, 14 AWG to 1000 kcmil.
ElectricalBattery Size Chart
AA, AAA, C, D, 9V, CR123A, CR2032 and 18650 dimensions and voltages.
Machining
Fraction ↔ Decimal ↔ mm
Type 3/8, 0.375 or 9.525 — the other fields follow, with the 1/64 rounding shown.
MachiningDrill Bit Size Chart
Number, letter and fractional bits with decimal and mm equivalents.
MachiningTap Drill Size Chart
Recommended drill for 75% and 50% thread engagement.
MachiningThread Size Chart
UNC, UNF and metric thread pitch and diameter reference.
MachiningMetric Thread Stress Area
Tensile stress area for coarse and fine metric threads, M3 to M39.
MachiningPipe Size Chart (Sch 40)
Nominal pipe size, outside diameter and wall thickness.
MachiningAN Fitting Size Chart
AN dash numbers to tube outside diameter.
MachiningBearing Bore Size Chart
Bore diameters for 6000, 6200 and 6300 series bearings.
MachiningHardness Conversion (HB/HRC/HV)
Brinell, Vickers and Rockwell equivalents with tensile strength.
MachiningSurface Roughness (Ra, N-grade)
Ra, Rz, RMS and ISO N-grades with the process that produces each.
MachiningMusic Wire Size Chart
ASTM A228 spring wire diameters with tensile strength ranges.
Hardware
Metric Bolt Size Calculator
Pick M3–M36 for pitch, wrench size, hex key, tap drill and stress area.
HardwareSheet Metal Gauge Chart
US gauge numbers to thickness in inches and mm.
HardwareSteel Sheet Gauge (US Std)
The US legal standard gauge, 7/0 to 16, in inch fraction and mm.
HardwareWood Screw Size Chart
Screw gauge numbers to shank diameter.
HardwareSocket & Wrench Sizes
SAE fractional sizes with their metric equivalents.
HardwareWrench & Spanner Sizes
Across-flats wrench size for metric hex and socket head fasteners.
HardwareNail Size Chart
Common nail sizes by penny designation and length.
HardwareMetric Bolt Head Sizes
ISO 4014 hex head and ISO 4762 socket head dimensions, M3 to M36.
HardwareWasher Size Chart
ISO 7089 plain washer inside and outside diameters, M3 to M24.
HardwareBolt Grade & Strength
Metric classes 8.8, 10.9, 12.9 and SAE grades 2, 5, 8.
HardwareFlange Dimensions (B16.5)
ASME B16.5 Class 150 and 300 flange sizes, 1 in to 24 in.
HardwareO-Ring Size Chart (AS568)
SAE AS568 o-ring series with cross-sections and tolerance ranges.