🇺🇸 US edition · Metric and US customary unitsPrecision engineering calculators & references
IMIMPERAMETRICENGINEER · CALCULATE · BUILD
Home / Reference
Reference centre

Engineering tables

Quick workshop data with visible units and assumptions.

Metric Thread & Tap Drill Chart

Workshop-ready reference table with clear units.

Open table

Material Density Table

Workshop-ready reference table with clear units.

Open table

UNC / UNF overview

Unified thread sizes are identified by nominal diameter and threads per inch. Always verify series and class before pairing parts.

Engineering constants

Gravity 9.80665 m/s²; water density approximately 1,000 kg/m³; steel elastic modulus approximately 200 GPa.