Quantum Tunneling Calculator

Calculate transmission probability through a rectangular potential barrier

Particle Mass (kg):

Barrier Height V0 (J):

Particle Energy E (J):

Barrier Width L (m):

kappa = sqrt(2m(V0-E)) / hbar

T = 1 / (1 + V0^2 sinh^2(kappa*L) / (4E(V0-E)))

R = 1 - T

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Formula Source: University Physics

by Young & Freedman

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.