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Mass

Just how heavy is 1 milligram?

In your hand

1 mg

Scale
1 milligram

The quantity is exact as entered.

1 × 10⁻⁶ kgMass in kilograms
0 kg
Grain of sand

A grain of sand is a tiny fragment of rock or mineral, commonly found on beaches and in soil.

1 × 10⁻⁶ kgMass in kilograms
0 kg

Bar length measures mass, not physical size. Both bars start at zero kilograms (kg). Pictures identify the objects only.

A little perspective

1 milligram is approximately equal to the mass of a grain of sand.

Measurements, assumptions & sources +

1 milligram

Mass: 1 mg; definition.

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Grain of sand

Mass: 1 mg; example.

Separate illustrative measurements: 0.5 mm across; 1 mg mass. Mineral and shape vary.

Defined examples — our methodology

The marked mass is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

Compare 1 milligram with the mass of a grain of sand. The notes below explain how each value was chosen.

1 milligram

1 mg

Mass · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Grain of sand

1 mg

Mass · example

Separate illustrative measurements: 0.5 mm across; 1 mg mass. Mineral and shape vary.

Comparing
Mass ↔ Mass
Relative size
1 milligram is approximately equal to the mass of a grain of sand.

How to read the visual

The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.

  • The mass of a grain of sand: This is an illustrative comparison value, not a claim that every example is the same.

Mass is distinct from weight: an object’s mass stays the same as gravity changes.

1 × 10⁻⁶ kgkilograms
2.2046 × 10⁻⁶ lbpounds
1 × 10⁻⁹ ttonnes

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