Calculators

Symbolic expressions with documented algorithms

Plot equations and coordinate data in two or three dimensions

Engineering formulas with live diagrams and worked guides

Portable symbolic algebra with numerical approximation

Solar movement and shadow information on a map

Physics calculations with visual explanations

Map measurements, radii and geographic lookup tools

Calculated physical and chemical protein parameters

Calculators with contextual input help

Brew-day volumes, temperatures and efficiency calculations

Compare mathematical curves with a shared time parameter

Browser-based statistics from pasted data

Browser tools for beam and structural calculations

Arithmetic, finance and programming modes in one app

Chemical calculations with balancing and molar-mass tools

Structural calculators with free tools and paid design checks

Symbolic, numerical and number-theory calculators

Construction quantities and materials-test calculations

Nucleic-acid folding calculations with explicit constraints

Statistical power and effect-size calculation

Calculus and algebra calculators with explanations

Practical telescope and observing calculations

Solve and inspect mathematical expressions

Location-based photovoltaic performance calculations