AP Chemistry Formula Sheet
This AP Chemistry formula sheet sets out the AP Chemistry Equations and Constants from the College Board’s Exam Reference Information (2025). You get this AP chem formula sheet in the exam, so practise with it until you can find each equation quickly.
- 26 formulas
- 3 sections
- Checked 22 October 2026
Atomic structure, gases, liquids and solutions
With constants: h = 6.626 × 10⁻³⁴ J s, c = 2.998 × 10⁸ m s⁻¹, Avogadro’s number = 6.022 × 10²³ mol⁻¹.
- Photon energy and wave speed
- Coulombic force
- Combined gas law
- Ideal gas law
- Partial pressure
- Total pressure
- Moles, density and kinetic energy
- Molarity
- Beer–Lambert law
- Gas constant and STP
Kinetics and equilibrium
Integrated rate laws, equilibrium constants and pH.
- Zero order
- First order
- Second order
- Equilibrium constant (aA + bB ⇌ cC + dD)
- Water
- pH and pOH
- Acids and bases
- pK values
- Henderson–Hasselbalch
Thermodynamics and electrochemistry
Faraday’s constant F = 96,485 coulombs per mole of electrons.
- Heat
- Enthalpy of reaction
- Entropy of reaction
- Gibbs free energy of reaction
- Gibbs free energy
- Current
- Nernst equation
Based on the College Board AP Chemistry Exam Reference Information (© 2025 College Board) (official source), checked 22 October 2026. Always check the formula list printed in your own exam paper.
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