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Helium Atom vs Hydrogen Atom vs Water Molecule vs Carbon Atom vs…

This comparison shows 19 objects drawn to scale. Drag the view to rotate it, or add your own items to the comparison.

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Size comparison of Helium Atom (0.03 × 0.03 × 0.03 km), Hydrogen Atom (0.11 × 0.11 × 0.11 km), Water Molecule (0.28 × 0.28 × 0.28 nm), Carbon Atom (0.34 × 0.34 × 0.34 nm), Cesium Atom (0.5 × 0.5 × 0.5 km), Glucose Molecule (0.8 × 0.8 × 0.8 km), and 13 more, drawn to scale
Dimensions (height × width × depth)
ObjectAs enteredCentimetresInches
Helium Atom0.03 × 0.03 × 0.03 km2,500 × 2,500 × 2,500 cm984 × 984 × 984 in
Hydrogen Atom0.11 × 0.11 × 0.11 km11,000 × 11,000 × 11,000 cm4,331 × 4,331 × 4,331 in
Water Molecule0.28 × 0.28 × 0.28 nm0 × 0 × 0 cm0 × 0 × 0 in
Carbon Atom0.34 × 0.34 × 0.34 nm0 × 0 × 0 cm0 × 0 × 0 in
Cesium Atom0.5 × 0.5 × 0.5 km50,000 × 50,000 × 50,000 cm19,685 × 19,685 × 19,685 in
Glucose Molecule0.8 × 0.8 × 0.8 km80,000 × 80,000 × 80,000 cm31,496 × 31,496 × 31,496 in
DNA Alpha Helix1.2 × 1.2 × 1.2 km120,000 × 120,000 × 120,000 cm47,244 × 47,244 × 47,244 in
DNA Alpha Helix2 × 2 × 2 nm0 × 0 × 0 cm0 × 0 × 0 in
DNA3 × 3 × 3 nm0 × 0 × 0 cm0 × 0 × 0 in
Transistor Gate5 × 5 × 5 km500,000 × 500,000 × 500,000 cm196,850 × 196,850 × 196,850 in
Porcine Circovirus17.0 × 17.0 × 17.0 nm0 × 0 × 0 cm0 × 0 × 0 in
Hepatitis B Virus42.0 × 42.0 × 42.0 nm0 × 0 × 0 cm0 × 0 × 0 in
HIV Virus90.0 × 90.0 × 90.0 nm0 × 0 × 0 cm0 × 0 × 0 in
Bacteriophage200 × 200 × 200 nm0 × 0 × 0 cm0 × 0 × 0 in
Mimivivus500 × 500 × 500 nm0 × 0 × 0 cm0 × 0 × 0 in
Coronavirus550 × 550 × 550 nm0 × 0 × 0 cm0 × 0 × 0 in
Mitochondrion0 × 0 × 0 mm0 × 0 × 0 cm0 × 0 × 0 in
Largest Virus2,000 × 2,000 × 2,000 nm0 × 0 × 0 cm0 × 0 × 0 in
Clay Particle2,000 × 2,000 × 2,000 nm0 × 0 × 0 cm0 × 0 × 0 in
Bounding-box volumes as bars: Helium Atom 15,625 m³, Hydrogen Atom 1,331,000 m³, Water Molecule 2.2 × 10<sup>−20</sup> mm³, Carbon Atom 3.9 × 10<sup>−20</sup> mm³, Cesium Atom 125,000,000 m³, Glucose Molecule 512,000,000 m³, DNA Alpha Helix 1.73 km³, DNA Alpha Helix 8 × 10<sup>−18</sup> mm³, DNA 2.7 × 10<sup>−17</sup> mm³, Transistor Gate 125 km³
Bounding-box volume*
ObjectVolumevs smallest
Helium Atom15,625 m³>1,000,000×
Hydrogen Atom1,331,000 m³>1,000,000×
Water Molecule2.2 × 10−20 mm³1×
Carbon Atom3.9 × 10−20 mm³1.8×
Cesium Atom125,000,000 m³>1,000,000×
Glucose Molecule512,000,000 m³>1,000,000×
DNA Alpha Helix1.73 km³>1,000,000×
DNA Alpha Helix8 × 10−18 mm³364×
DNA2.7 × 10−17 mm³1,230×
Transistor Gate125 km³>1,000,000×
Porcine Circovirus4.9 × 10−15 mm³223,806×
Hepatitis B Virus7.4 × 10−14 mm³>1,000,000×
HIV Virus7.3 × 10−13 mm³>1,000,000×
Bacteriophage8 × 10−12 mm³>1,000,000×
Mimivivus1.3 × 10−10 mm³>1,000,000×
Coronavirus1.7 × 10−10 mm³>1,000,000×
Mitochondrion1 × 10−9 mm³>1,000,000×
Largest Virus8 × 10−9 mm³>1,000,000×
Clay Particle8 × 10−9 mm³>1,000,000×

* Height × width × depth of the box each object fits in, not the object's own volume. Multiples are against the smallest box here, Water Molecule. Anything beyond a million times bigger is shown as >1,000,000×.

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