Planck mass = 2.176 434 × 10⁻⁸ kg

Name: Planck mass — CODATA 2022 value
Creator: NIST

Value: 2.176 434 × 10⁻⁸
Unit: kg
Uncertainty: 0.000 024 × 10⁻⁸
Copy-ready: 2.176434e-8

The Planck mass, built from G, ℏ and c alone.

The scale at which quantum effects of gravity should matter — far beyond any experiment, and the reason G limits its precision.

The same quantity, other ways NIST lists it

Quantity (NIST name)	Value	Unit	Uncertainty
Planck mass energy equivalent in GeV	1.220 890 × 10¹⁹	GeV	0.000 014 × 10¹⁹

NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.

Natural units and Planck units

Planck length Planck mass Planck temperature Planck time Natural unit of momentum Natural unit of time

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UsePhysics. "Planck mass — 2.176 434 × 10−8 kg." UsePhysics.com. https://usephysics.com/reference/planck-mass. Value from the 2022 CODATA adjustment (NIST). Accessed [date].