100 picograms
100 pgMass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Mass
Particles & molecules
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.
Mass: 100 pg; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
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
Compare 100 picograms with the mass of a red blood cell. The notes below explain how each value was chosen.
Mass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Mass · defined specimen
A chosen 7.5 µm human red-blood-cell diameter. Real cells vary and deform.
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
Mass is distinct from weight: an object’s mass stays the same as gravity changes.
Change your perspective
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.