Lorentz Force & Cyclotron Motion Calculator
Force on a charged particle in electric and magnetic fields, with gyroradius and cyclotron frequency.
How to use the Lorentz Force & Cyclotron Motion Calculator
- Enter or select: Particle, Speed v, Magnetic field B, Electric field E, Angle between v and B.
- Fill in what you know of: Custom charge, Custom mass — leave the unknown empty.
- The results (Magnetic force, Electric force, Gyroradius, Cyclotron frequency, Cyclotron period, Helix pitch) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- F = q(E + v × B)
- r = m v⊥ / (|q| B)
- f_c = |q| B / (2π m)