- Value
- 1.616 255 × 10−35
- Unit
- m
- Uncertainty
- 0.000 018 × 10⁻³⁵
- Copy-ready
1.616255e-35
The Planck length, 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.
NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.
Natural units and Planck units
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UsePhysics. "Planck length — 1.616 255 × 10−35 m." UsePhysics.com. https://usephysics.com/reference/planck-length. Value from the 2022 CODATA adjustment (NIST). Accessed [date].