Fundamental physical constants, reference tables, and conversion factors.
Most used tools
Calculate wavelength and frequency from the speed of light.
Calculate photon energy using E = hf.
Convert between moles, particles, and molar mass.
Calculate gravity using G = 6.674×10⁻¹¹ N·m²/kg².
Reference table of fundamental physical constants.
14 tools available
Calculate wavelength and frequency from the speed of light.
Calculate photon energy using E = hf.
Calculate thermal energy using E = kT.
Convert between moles, particles, and molar mass.
Use R = 8.314 J/(mol·K) for gas calculations.
Calculate gravity using G = 6.674×10⁻¹¹ N·m²/kg².
Convert between Coulombs and elementary charges.
Convert between electron count and mass.
Convert between proton count and mass.
Calculate radiated power using P = σAT⁴.
Calculate electric force using k = 8.9875×10⁹ N·m²/C².
Use ε₀ = 8.854×10⁻¹² F/m for capacitance.
Use μ₀ = 4π×10⁻⁷ H/m for magnetic calculations.
Reference table of fundamental physical constants.
Our constants & reference calculators provide accurate, instant results for physics calculations. Whether you need to compute forces, velocities, energies, or other physical quantities, these tools have you covered.
