Formula Bro explains the formulas behind artificial intelligence, computers, electricity and quantum physics in plain English. Every page tells you what each symbol means, how to read the formula out loud, and works through one example with real numbers you can check on a calculator.
No sign-up, no paywall. Pick a subject, or start with Ohm's law if you have never read a formula before.
Subjects
- AI & Machine Learning (8 formulas)
- Computer Science (6 formulas)
- Electricity (7 formulas)
- Quantum Mechanics (7 formulas)
All 28 formulas
AI & Machine Learning
- Artificial Neuron (Weighted Sum)
- Sigmoid Function
- Softmax
- Mean Squared Error (MSE)
- Cross-Entropy Loss
- Gradient Descent
- Bayes' Theorem
- Scaled Dot-Product Attention
Computer Science
Electricity
- Ohm's Law
- Electric Power
- Energy and Kilowatt-Hours
- Resistors in Series and Parallel
- Kirchhoff's Current Law
- RC Time Constant
- Coulomb's Law
Quantum Mechanics
- Planck-Einstein Relation (E = hf)
- Photoelectric Effect
- De Broglie Wavelength
- Heisenberg Uncertainty Principle
- Born Rule
- Schrödinger Equation
- Hydrogen Energy Levels
How every page is laid out
- The formula in one sentence.
- The formula itself, and how to say it out loud.
- A table of every symbol, with units.
- What the formula is doing, and an everyday picture of it.
- A worked example with numbers, checked by script.
- Common mistakes, where you will meet it, questions people ask, and sources.