Radioactive decay, half-life, binding energy, and nuclear reaction calculators. Browse our free nuclear tools below — all calculators are instant, accurate, and require no sign-up.
Bohr Model Calculator — Calculate orbital radius, energy levels, electron velocity, and photon wavelengths for hydrogen-like atoms using the Bohr model of the atom.
Compton Scattering Calculator — Calculate wavelength shift, scattered photon energy, and recoil kinetic energy for Compton scattering off electrons, protons, or muons.
Heisenberg Uncertainty Principle Calculator — Calculate minimum momentum, velocity, and energy uncertainties from the Heisenberg uncertainty principle for position–momentum and energy–time relations.
Photoelectric Effect Calculator — Calculate maximum kinetic energy, stopping voltage, and threshold wavelength for the photoelectric effect across 12 metals with multiple input modes.
Quantum Number Calculator — Analyze and validate sets of quantum numbers (n, l, mₗ, mₛ), explore subshell capacities, orbital nodes, and generate electron configurations using the Aufbau principle.
Rydberg Equation Calculator — Calculate spectral line wavelengths, photon energies, and wavenumbers using the Rydberg equation for hydrogen and hydrogen-like ions across all spectral series.