Step-by-step voltage drop formula with worked examples for kitchen circuits, EV chargers, landscape lighting, and three-phase feeders. Includes NEC 3%/5% rules, max-length reference table, and copper vs. aluminum comparison.
11 min read
Guides
In-depth reference guides for unit conversions, measurement systems, and practical calculations.
Browse by tag โFull color code chart for 4, 5, and 6 band resistors plus SMD codes and E-series preferred values. Worked examples, mnemonics, and field tips.
13 min read
Full AWG chart from 4/0 to 40 with diameters, areas, resistance, and NEC ampacity. Covers AWG-to-mmยฒ conversion, how to pick wire gauge by voltage drop, and copper vs. aluminum.
11 min read
US gallon vs imperial gallon, troy ounce vs avoirdupois ounce, fluid ounce vs weight ounce, three kinds of ton, and nautical vs statute mile. The exact numbers and history behind units that share a name but not a definition.
10 min read
Everything you need to know about converting between cups, grams, ounces, tablespoons, and milliliters for baking and cooking.
9 min read
How temperature scales were invented, how they relate to each other, and when to use Fahrenheit, Celsius, Kelvin, or Rankine.
13 min read
From millimeters to miles, a practical reference for converting between metric and imperial length units in everyday life, construction, and science.
13 min read
A practical guide to mortgages, compound interest, loans, and tips โ what the numbers mean and how to use financial calculators effectively.
13 min read
Understand the differences between the metric and imperial measurement systems, their history, and when to use each. Includes practical conversion tips for everyday use.
10 min read