Free Chemistry Calculators
An equation balancer, an ideal-gas solver, and a formula sheet for the chemistry you're studying.
Last reviewed: June 2026
Ideal Gas Law Calculator
Solve PV = nRT for pressure, volume, moles, or temperature in any unit combination — atm, kPa, mmHg, °C, K, and more.
Chemical Equation Balancer
Type any unbalanced equation and get the balanced coefficients, computed exactly by mass conservation.
Chemistry Formula Sheet
Every essential chemistry formula in one printable reference.