Planck Units Calculator
Convert between SI units and natural Planck units
Results
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All Planck Units
lP (length):1.6163e-35 m
tP (time):5.3912e-44 s
mP (mass):2.1764e-8 kg
TP (temp):1.4168e+32 K
EP (energy):1.9561e+9 J
Formulas
lP = √(ℏG/c³) ≈ 1.616×10⁻³⁵ m
tP = √(ℏG/c⁵) ≈ 5.391×10⁻⁴⁴ s
mP = √(ℏc/G) ≈ 2.176×10⁻⁸ kg
Planck units are natural units where ℏ = c = G = kB = 1.
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: University Physics
by Young & Freedman
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.