1 Planck mass
21.76 µgMass · definition
A theoretical scale made from physical constants. It is not a proven smallest object or a hard physical limit.
Mass
Just how heavy is 1 Planck mass?
In your hand
1 mP
2.1764 × 10⁻⁸ kgkilograms
4.7982 × 10⁻⁸ lbpounds
2.1764 × 10⁻¹¹ ttonnes
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1 Planck mass21.76 µgMass · definition
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Planck mass21.76 µgMass · theoretical
Bar length measures mass, not physical size.
A little perspective
1 Planck mass and Planck mass have approximately the same mass.
Measurements, assumptions & sources +
1 Planck mass
A theoretical scale made from physical constants. It is not a proven smallest object or a hard physical limit.
Planck mass
A theoretical mass scale formed from fundamental constants. It is neither a universal minimum nor a universal maximum mass.
NIST — 2022 CODATA fundamental constants
The marked mass is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
The visual compares mass with mass. The records below preserve each value’s basis and caveats.
Planck mass
21.76 µgMass · theoretical
A theoretical mass scale formed from fundamental constants. It is neither a universal minimum nor a universal maximum mass.
- Comparing
- Mass ↔ Mass
- Relative size
- The two selected measurements are approximately equal.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Planck mass is labelled theoretical; treat the displayed value as a comparison anchor rather than false precision.
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