The Lenz’s Law Calculator determines the induced electromotive force (emf) and its direction when the magnetic flux through a coil changes with time, using the relation ε=−N×(ΔΦ/Δt)ε = -N × (ΔΦ / Δt)ε=−N×(ΔΦ/Δt). Here, NNN is the number of turns of the coil, ΔΦΔΦΔΦ is the change in magnetic flux in webers, and ΔtΔtΔt is the time interval in seconds. The negative sign represents Lenz’s Law, which states that the induced current always flows in a direction that opposes the change in magnetic flux causing it. This calculator helps students and engineers understand electromagnetic induction, current opposition, and energy conservation in magnetic systems.