More tools
Other study tools
These are separate sites, each one for a different subject or exam. Like RefDrill, they need no account. Each description is the site's own.
- EngiRef119 engineering formulas with solvers, 56 materials, 134 unit conversions, constants and reference tables.
- CalcRefCalcRef is a browser-native calculus reference: the full formula database, topic browsing, search, favorites, practice prompts and unit conversion.
- PhysRefSearch physics formulas, solve built-in calculators, save notes, browse constants, and convert units in a responsive web reference.
- ScoreMintPractice for the SAT®, AP®, and ACT® exams with per-choice explanations, timed sections, spaced review, and progress tracking.
- GaugePassFree weld symbol, filler metal, discontinuity and welding math reference, plus practice questions and a gauge trainer for welding inspectors.
- CogoKitFree COGO calculators for land surveyors: horizontal and vertical curves, traverse closure, area by coordinates and bearings, plus FS exam practice.
- 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 drill, the handbook sections and the navigation guides are where most visitors start.