SFSpecFits

Cheat sheets

Fast-lookup reference tables for common electrical and hardware standards. No fluff — just the numbers you need.

AWG Wire Gauge

Wire gauge to current capacity and common applications for household wiring, extension cords, and speaker wire.

AWG reference →

HDMI Versions

HDMI 1.4 vs 2.0 vs 2.1 — bandwidth, max resolution, refresh rate, and features like eARC, VRR, ALLM.

HDMI versions →

Fuse Color Codes

Automotive blade fuse colors (ATC/ATO mini-blade and maxi-blade) by amperage. Identify a fuse rating at a glance.

Fuse color codes →

Alkaline Battery Sizes

AA, AAA, C, D, 9V dimensions, voltage, and capacity at a glance. Common devices and substitution rules.

Battery sizes →

Coin Cell Equivalents

Cross-reference table for CR2032, CR2025, CR2016, LR44, SR44 and equivalent brand designations.

Coin cell chart →

Hearing Aid Battery Reference

Size 10, 312, 13, 675 dimensions, voltage, and color dot system quick reference.

Hearing aid batteries →

Light Bulb Bases

E26, E27, GU10, G9, G4, MR16 base types — quick identification reference.

Bulb base quick reference →