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Algebra entry with solving, factoring and graphing modes

Scientific expressions with variables and numerical calculus

A notepad calculator with variables and calendar expressions

Current-limiting resistor calculations for LED arrays

A simplified photovoltaic energy-production estimate

Instrument-specific observing calculations

Room-mode calculations for rectangular and shaped rooms

Plan prepaid travel data with a separate calling-number benefit

Create and run browser, mobile, API, performance, and accessibility checks with a hosted test platform.

VidStats is a YouTube analytics platform with real-time tracking, competitor analysis, and creator tools.

Formula calculators with selectable input units

Practical finance, cooking and unit calculations

Construction and everyday calculations with searchable tasks

A catalogue of practical and specialist calculations

Scientific and everyday calculations with units

High-precision scientific calculation with reusable expressions

A desktop calculator with recall and configurable precision

Scientific calculation with RPN and programmable functions

Statistical calculators linked to formulas and references

Circuit and electrical formulas grouped by task

Emissions estimates for travel, homes and events

Editable notes with live scientific calculations

Weather quantities with linked formulas

Plot equations and coordinate data in two or three dimensions