More tools

Other references

These are separate sites, each a reference for a different subject or trade. Each description is the site's own.

  • PhysRefSearch physics formulas, solve built-in calculators, save notes, browse constants, and convert units in a responsive web reference.
  • CalcRefCalcRef is a browser-native calculus reference: the full formula database, topic browsing, search, favorites, practice prompts and unit conversion.
  • ChemTableInteractive periodic table, element details, chemistry tools, quizzes, favorites, and study notes.
  • AmpSizerWire size, ampacity, voltage drop and conduit fill calculators built on published 2023 NEC tables, from 14 AWG to 2000 kcmil in copper or aluminum.
  • ThreadRefThread and fastener reference for 228+ sizes: metric, Unified and pipe threads with tap drills, clearance holes, torque estimates and wrench sizes.
  • MixRatioConcrete, mortar and grout calculators for slabs, footings, columns and post holes: cubic yards, cubic metres and bag counts, plus 179 worked examples.
  • RefDrillA timed drill that trains you to find any topic in the NCEES FE Reference Handbook in seconds, plus a free guide to every section of the handbook.
  • ReadTheSetLearn to read construction drawings by reading a real set: floor plans, sections, details and schedules, with measuring, callout drills and graded reasoning.

Looking for something on this site instead? The formulas, the materials and the unit converter are the places most visitors start.