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Mathematics and practical calculators by subject

Construction and everyday calculations with searchable tasks

High-precision scientific calculation with reusable expressions

Arbitrary-precision arithmetic that keeps track of units

Arithmetic, finance and programming modes in one app

A searchable catalogue of calculations and conversions

Programmable scientific arithmetic with saved formulas

Statistical tests, power analysis and descriptive tools

Statistical calculations with method-selection guidance

Statistical calculators linked to formulas and references

Research-statistics calculators for study interpretation

Focused statistics tools for research calculations

Structural calculations linked to worked examples

Beam analysis that can continue into a 2D model

Panel cutting layouts and cabinetry cost calculations

Geographic area, distance and travel-time map calculations

Emissions estimates for travel, homes and events

Everyday calculation tools in one mobile app

Matrix-based numerical calculation and visualization

Symbolic calculation through a compact command interface

Energy-system performance and financial calculations

Molecular masses, formulas and isotope distributions

Educational aviation and atmosphere calculations

Practical telescope and observing calculations