This comparison shows 18 objects drawn to scale. Drag the view to rotate it, or add your own items to the comparison.

| Object | As entered | Centimetres | Inches |
|---|---|---|---|
| Hydrogen Atom | 0.05 × 0.05 × 0.05 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Carbon atom | 0.12 × 0.12 × 0.12 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Porcine circovirus | 14.0 × 14.0 × 14.0 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Porcine circovirus aka smallest virus | 17.0 × 17.0 × 17.0 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Hepatitis Virus | 45.0 × 45.0 × 45.0 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Covid19 virus | 90.0 × 90.0 × 90.0 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| HIV Virus | 90.0 × 90.0 × 90.0 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Giant virus (Mimivirus) | 700 × 700 × 700 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| virus | 830 × 800 × 830 nm | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Red blood cell | 7 × 7 × 7 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| skin cell | 10.0 × 6 × 10.0 um | 0 × 0 × 0 cm | 0 × 0 × 0 in |
| Grain of salt/sand | 500 × 500 × 500 um | 0.05 × 0.05 × 0.05 cm | 0.02 × 0.02 × 0.02 in |
| Grain of sand | 800 × 785 × 800 um | 0.08 × 0.08 × 0.08 cm | 0.03 × 0.03 × 0.03 in |
| Grain of rice | 2 × 1 × 1 mm | 0.2 × 0.1 × 0.1 cm | 0.08 × 0.04 × 0.04 in |
| Frog | 4 × 2 × 2.5 cm | 4 × 2 × 2.5 cm | 1.57 × 0.79 × 0.98 in |
| Puppy (10 Weeks Old) | 11.0 × 7 × 7 in | 27.9 × 17.8 × 17.8 cm | 11.0 × 7 × 7 in |
| Human | 1 × 1 × 1 m | 100 × 100 × 100 cm | 39.4 × 39.4 × 39.4 in |
| Tree | 25.0 × 8 × 8 ft | 762 × 244 × 244 cm | 300 × 96.0 × 96.0 in |

| Object | Volume | vs smallest |
|---|---|---|
| Hydrogen Atom | 1.3 × 10−22 mm³ | 1× |
| Carbon atom | 1.7 × 10−21 mm³ | 14× |
| Porcine circovirus | 2.7 × 10−15 mm³ | >1,000,000× |
| Porcine circovirus aka smallest virus | 4.9 × 10−15 mm³ | >1,000,000× |
| Hepatitis Virus | 9.1 × 10−14 mm³ | >1,000,000× |
| Covid19 virus | 7.3 × 10−13 mm³ | >1,000,000× |
| HIV Virus | 7.3 × 10−13 mm³ | >1,000,000× |
| Giant virus (Mimivirus) | 3.4 × 10−10 mm³ | >1,000,000× |
| virus | 5.5 × 10−10 mm³ | >1,000,000× |
| Red blood cell | 3.4 × 10−7 mm³ | >1,000,000× |
| skin cell | 6 × 10−7 mm³ | >1,000,000× |
| Grain of salt/sand | 0.13 mm³ | >1,000,000× |
| Grain of sand | 0.5 mm³ | >1,000,000× |
| Grain of rice | 2 mm³ | >1,000,000× |
| Frog | 20.0 cm³ | >1,000,000× |
| Puppy (10 Weeks Old) | 8.83 litres | >1,000,000× |
| Human | 1 m³ | >1,000,000× |
| Tree | 45.3 m³ | >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, Hydrogen Atom. Anything beyond a million times bigger is shown as >1,000,000×.