Keep the useful numbers nearby
Reference
Charts, tables, and explanations for the information that is easier to compare than calculate.
Fraction, Decimal, and Millimeter Chart
Common inch fractions through one inch.
Drill Size Comparison Chart
Fractional, number, and metric size comparisons.
Wire Gauge Reference Chart
AWG diameter and approximate copper resistance.
Fastener Hole Reference
Pilot, tap, clearance, counterbore, and countersink differences.
Material Density Reference
Approximate densities for common shop materials.