Calculators

Current-limiting resistor calculations for LED arrays

Scientific expressions with variables and numerical calculus

A notepad that calculates alongside written working

Computational discrete algebra with a specialist language

Math and personal-finance calculation tools

Monthly cost scenarios for planned cloud workloads

Symbolic calculation through a compact command interface

Math and electrical calculations in a compact tool directory

Editable calculations with automatic dependency updates

Build formula-driven calculators for a website

Subject-aware problem solving with worked steps

Symbolic tensor calculations for field-theory problems

Formula-driven apps built from spreadsheet-style logic

A graphing-calculator emulator in the browser

A desktop calculator with recall and configurable precision

Residential HVAC load, selection and duct calculations

Mathematical calculators organized by learning topic

Mechanical-design calculators with documented methods

Steady-state chemical flowsheet calculations

Educational aviation and atmosphere calculations

Engineering calculations with steps and interactive models

Personal emissions estimates with quick and detailed inputs

Computer algebra with graphs, geometry and statistics

Weather quantities with linked formulas