Rule of Three Calculator
Instantly solve unknown proportions using client-side cross-multiplication.
Algorithmic Transparency Engine
Awaiting input to generate mathematical logic...
How This Works & The Math Behind It
The Rule of Three is a mathematical rule that allows you to solve problems based on proportions. By knowing three numbers: A, B, and C, you can calculate an unknown fourth number, X.
The Core Equation: X = (B × C) ÷ A
This strictly client-side tool uses Javascript to map your inputs and immediately execute proportional cross-multiplication directly in your browser's RAM, ensuring your data never touches a server.