Gravitational attraction between two one-kilogram masses one metre apart
This is the gravitational force acting between two one-kilogram objects placed one metre apart in a vacuum.
How big is it?
6.7 × 10⁻¹¹ N · force
Force · derived calculation
A little perspective
Gravitational attraction between two one-kilogram masses one metre apart vs Single DNA molecule stretching force: weight comparison
The gravitational attraction between two one-kilogram masses one metre apart is about 1.34 times the force stretching a single DNA molecule.
FORCE
This is the gravitational force acting between two one-kilogram objects placed one metre apart in a vacuum.
Single DNA molecule stretching force is the force required to extend a single DNA strand under controlled laboratory conditions.
Measurements, assumptions & sources +
Gravitational attraction between two one-kilogram masses one metre apart
Force: 6.7 × 10⁻¹¹ N; derived calculation.
Newtonian point-mass force between two 1 kg masses separated centre to centre by 1 m. It is calculated, not a direct force measurement.
Calculated for two point masses from the CODATA gravitational constant; the displayed value is rounded and inherits G's measurement uncertainty.
NIST — 2022 CODATA fundamental constants
The marked force is calibrated. Unmeasured illustration details are representative.
Single DNA molecule stretching force
Representative stretching force: 5 × 10⁻¹¹ N; representative; range 1 × 10⁻¹² N–1 × 10⁻¹⁰ N.
A representative 50 pN single-molecule force in the DNA stretching regime. Measured force depends on construct, contour state, buffer, temperature and pulling protocol; the molecular image is schematic.
NIST — DNA stretching measurements
The marked representative stretching force is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 6.7 × 10⁻¹¹ N
We compare the gravitational attraction between two one-kilogram masses one metre apart. This is calculated from stated inputs and assumptions, not a direct measurement.
Newtonian point-mass force between two 1 kg masses separated centre to centre by 1 m. It is calculated, not a direct force measurement.
Calculated for two point masses from the CODATA gravitational constant; the displayed value is rounded and inherits G's measurement uncertainty.
The picture identifies the subject; the diagram compares the recorded values. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 6.7 × 10⁻¹¹ N | Not recorded | derived calculation |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valueFundamental physicsSingle DNA molecule stretching force5 × 10⁻¹¹ NRepresentative stretching forceSingle DNA molecule stretching force is the force required to extend a single DNA strand under controlled laboratory conditions.Nearest higher valueGravity and forceEarth-Moon L1 tidal acceleration over one kilometre8.03 × 10⁻⁸ NEquivalent differential force on a 1 kg bodyEarth-Moon L1 tidal acceleration over one kilometre is the difference in gravitational pull experienced across a one-kilometre distance near the Earth-Moon L1 point.Sources and method
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The source records and measurement method remain available for inspection.
- NIST — 2022 CODATA fundamental constantsRecommended constants with uncertainties; exact SI definitions are distinguished from measured constants.
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Follow your curiosity.
Fundamental physicsSingle DNA molecule stretching force5 × 10⁻¹¹ NSingle DNA molecule stretching force is the force required to extend a single DNA strand under controlled laboratory conditions.GravityEarth-Moon L1 tidal acceleration over one kilometre8.03 × 10⁻⁸ NEarth-Moon L1 tidal acceleration over one kilometre is the difference in gravitational pull experienced across a one-kilometre distance near the Earth-Moon L1 point.GravityGravitational attraction between two people one metre apart3 × 10⁻⁷ NThis is the gravitational force that two people exert on each other when separated by one metre.
GravityLISA Pathfinder free-falling test mass5 × 10⁻¹⁵ NThe LISA Pathfinder free-falling test mass is a precisely controlled object in space used to demonstrate technologies for detecting gravitational waves by minimising non-gravitational forces.
Fundamental physicsSnowflake aerodynamic drag1 × 10⁻⁶ NSnowflake aerodynamic drag is the resistive force experienced by a falling snowflake as it moves through air.Fundamental physicsPhoton pressure thrust per kilowatt6.7 × 10⁻⁶ NPhoton pressure thrust per kilowatt is the force generated when one kilowatt of light is absorbed or reflected, due to photon momentum.Fundamental physicsRadiation pressure on a laser mirror7 × 10⁻⁶ NRadiation pressure on a laser mirror is the force exerted by a laser beam as its photons strike and reflect from the mirror.Fundamental physicsRaindrop aerodynamic drag0.0003 NRaindrop aerodynamic drag is the force exerted by air resistance on a falling raindrop as it moves through the atmosphere.