1 Planck volume
4.222 × 10⁻¹⁰² LVolume · definition
A theoretical scale made from physical constants. It is not a proven smallest object or a hard physical limit.
Volume & capacity
Just how much is 1 Planck volume?
Microscopic
1 ℓP³
1 Planck volume
A theoretical scale made from physical constants.
4.222 × 10⁻¹⁰² LVolume
Too small to see at this scale. The ring marks its true-scale position, not its volume. The shape has not been enlarged.
Planck length
The Planck length is a scale formed from fundamental physical constants.
4.222 × 10⁻¹⁰² LVolume
Too small to see at this scale. The ring marks its true-scale position, not its volume. The shape has not been enlarged.
These are equal-volume cubes. Edge lengths grow with the cube root of capacity; the cubes do not depict container exteriors.
A little perspective
1 Planck volume is approximately equal to the volume of the Planck length.
Measurements, assumptions & sources +
1 Planck volume
Volume: 4.222 × 10⁻¹⁰² L; definition.
A theoretical scale made from physical constants. It is not a proven smallest object or a hard physical limit.
Planck length
Volume: 4.222 × 10⁻¹⁰² L; theoretical.
A theoretical scale formed from the speed of light, reduced Planck constant and gravitational constant. It is not experimentally established as the smallest possible length. The area and volume are derived mathematical scales.
NIST — 2022 CODATA fundamental constants
The marked volume is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 1 Planck volume with the volume of the Planck length. The notes below explain how each value was chosen.
Planck length
4.222 × 10⁻¹⁰² LVolume · theoretical
A theoretical scale formed from the speed of light, reduced Planck constant and gravitational constant. It is not experimentally established as the smallest possible length. The area and volume are derived mathematical scales.
- Comparing
- Volume ↔ Volume
- Relative size
- 1 Planck volume is approximately equal to the volume of the Planck length.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The volume of the Planck length: This is a theoretical value calculated under stated physical assumptions, not a direct observation.
Volume measures three-dimensional space; a container’s capacity is not its outside dimensions.
4.2221 × 10⁻¹⁰² Llitres
4.2221 × 10⁻¹⁰⁵ m³cubic metres
1.1154 × 10⁻¹⁰² US galUS gallons
9.2873 × 10⁻¹⁰³ UK galUK gallons
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.