Printable Cheat Sheets
One-page printable pocket cards for the trades — wire sizes, pipe data, fastener charts, and shop math, composed from the same source-verified data as the calculators.
Every sheet here is a one-page pocket card: pick one, hit print, and it comes out sized for a letter page you can fold into a toolbox lid or pin over the bench. No cover pages, no navigation — just the table.
The numbers are never typed in by hand. Each block on a sheet is composed in code from the same source-verified constants that drive the site’s calculators and reference charts, and a cross-check test holds every cell byte-identical to its source.
All Sheets
Grounding & Conduit Fill Card — GEC, EGC Sizes & EMT Wire Capacity
One-page card: NEC grounding electrode and equipment grounding conductor sizes, EMT conduit fill percentages, and THHN capacity per trade size.
Updated August 22, 2026
Pipefitter's Pocket Card — PVC Dimensions, Pressure Ratings & Offset Multipliers
One-page pipefitter's card: PVC Schedule 40/80 dimensions, pressure ratings with temperature derating, and rolling offset travel multipliers.
Updated August 22, 2026
Welder's Pocket Card — Rod Amperage, Heat Input Factors, Gauges & Densities
One-page welder's card: stick electrode amperage by rod size, EN 1011-1 heat input efficiency factors, sheet gauges, and metal densities.
Updated August 22, 2026
Concrete & Masonry Pocket Card — W/C Ratios, Rebar & Brick Sizes
One-page concrete card: ACI 211 water-cement ratios, US and metric rebar sizes and weights, and standard brick and block dimensions.
Updated August 20, 2026
Decimal Equivalents Card
Pocket-card decimal equivalents: every 64th of an inch from 1/64″ to 1″ with decimal inches and exact millimetres — sized to print on one page.
Updated August 20, 2026
Electrician's Pocket Card — Ampacity, Motor FLA, Box Fill & Bending
One-page electrician's card: NEC 310.16 copper ampacity, motor full-load currents, box fill allowances, and EMT bend multipliers.
Updated August 20, 2026
Electronics Bench Card — Resistor Codes, LED Vf & Capacitor Units
One-page bench card: resistor color code bands per IEC 60062, typical LED forward voltages, wattage ladder, and capacitance unit prefixes.
Updated August 20, 2026
Framer's Pocket Card — Lumber Sizes, Nails, Pilot Holes & Joist Spans
One-page framing card: nominal vs actual lumber sizes, nail penny chart, wood screw pilot holes, and IRC deck joist spans.
Updated August 20, 2026
HVAC Tech Pocket Card — Air Properties, Duct Velocities & AC Sizing
One-page HVAC card: air properties by temperature, duct velocity limits, ENERGY STAR room AC sizing, and hydronic fluid properties.
Updated August 20, 2026
Jobsite Numbers Card — Stair Limits, Roof Pitch, Grades & Spacing Rules
One-page jobsite card: IBC/IRC/OSHA stair limits, roof pitch classes in degrees, IRC drainage grades, and guard and outlet spacing rules.
Updated August 20, 2026
Machinist's Pocket Card — Drills, Gauges, Hardness & Densities
One-page machinist's card: number and letter drill sizes, sheet metal gauges, HRC hardness conversions, and metal densities.
Updated August 20, 2026
Metric–Imperial Pocket Card — Exact Conversion Factors
One-page conversion card: exact NIST length, area, volume, and pressure factors plus temperature scale relations and absolute zero.
Updated August 20, 2026
Plumber's Pocket Card — Pipe Dimensions, C Factors & Gas Capacity
One-page plumber's card: Schedule 40/80 steel pipe dimensions, Hazen-Williams C factors, gas pipe capacities, and water heater sizing.
Updated August 20, 2026