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Mass

Just how heavy is 100 picograms?

Particles & molecules

100 pg

Scale
100 picograms

The quantity is exact as entered.

1 × 10⁻¹³ kgMass in kilograms
0 kg
Red blood cell

A red blood cell is a specialised blood cell that transports oxygen using haemoglobin.

1 × 10⁻¹³ 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

100 picograms is approximately equal to the mass of a red blood cell.

Measurements, assumptions & sources +

100 picograms

Mass: 100 pg; definition.

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

NIST — SI conversion factors

Red blood cell

Mass: 100 pg; defined specimen.

A chosen 7.5 µm human red-blood-cell diameter. Real cells vary and deform.

An illustrative mass chosen for this teaching specimen, stored independently from its size. Actual composition, hydration and specimen dimensions vary.

Defined examples — our methodology

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

Measurement details

Why these numbers?

Compare 100 picograms with the mass of a red blood cell. The notes below explain how each value was chosen.

100 picograms

100 pg

Mass · definition

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

Red blood cell

100 pg

Mass · defined specimen

A chosen 7.5 µm human red-blood-cell diameter. Real cells vary and deform.

Comparing
Mass ↔ Mass
Relative size
100 picograms is approximately equal to the mass of a red blood cell.

How to read the visual

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

  • Red blood cell: An illustrative mass chosen for this teaching specimen, stored independently from its size. Actual composition, hydration and specimen dimensions vary.

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

1 × 10⁻¹³ kgkilograms
2.2046 × 10⁻¹³ lbpounds
1 × 10⁻¹⁶ ttonnes

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