Tools & Calculators

The universe is under no obligation to make sense to you." - Neil DeGrasse Tyson

Data Analysis:

Quick Graph - regression models - fitting the best-fit-line to data (also MyCurveFit, GraphPad, StatsBlue, Desmos, NCESGraph).

NIST Uncertainty Machine - the easiest way to use the awesome Monte Carlo method.  Uncertainty Calculator - calculus method - A-level exams ask for 'correlated' i.e. pesimistic uncertainty estimates.  Another semi-decent calculator using the calculus method.  

 Alcula - simple descriptive statistics, data dispersion/box plots (also StatsKingdom).

Distributome - probability calculator and simulator.

Quick Tools:

WolframAlpha - SI units and prefixes, conversions, constants, data etc. using AI - just type a question!

Desmos - easy yet powerful scientific grapher and equation solver (also, a useful Desmos calculator; quadratic equation solver; GeoGebra; Mathway; Eigenmath; Calculator.net)

Engineering Toolbox - source of well-researched data on properties of materials, calculators and more (also HyperFactBook).

Periodic Table - interactive periodic table from the Royal  Society for Chemistry.

2D Vectors Calculator - add multiple vectors and resolve them into components.

Triangle Solver - solve any triangle for missing angles and sides.

Omni - over 145 problem-specific calculators, with explanations (also vCalc, CalcSoup, Psychrometric Charts 1, 2)

G-Docs, Sheets, Forms and Slides - Your free Google office, all in the cloud (needs a login).