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Subject calculators and a custom calculator builder

A keypad calculator with clear, memory and percentage controls

A graphing-calculator emulator in the browser

A TI graphing-calculator emulator for classroom explanation

Everyday calculation categories with a simple keypad

Everyday calculations with topic-specific explanations

Programmable scientific arithmetic with saved formulas

Scientific, graphing, fraction and matrix calculations

Readable calculators for quick everyday tasks

Organize dividend portfolios and compare income-growth scenarios

Free voice calculator you speak to, in the browser or on iPhone.

Standard, scientific, programmer and date calculations

Android scientific calculation with symbolic and graphical tools

A handheld-style scientific calculator for Android

Linked mathematical views for algebra, geometry and graphs

Cloud-service cost estimates with inspectable assumptions

Azure cost scenarios from selected services and usage

Formulas and notes arranged on a mathematical worksheet

Monthly cost scenarios for planned cloud workloads

Topic-based calculators for practical questions

Mathematics and practical calculators by subject

Arithmetic, finance and programming modes in one app

Integration with visible input, steps and graphs

A searchable catalogue of calculations and conversions