All things · The Machinery of Life
Haemoglobin: how big is it?
Haemoglobin is about 5.5 nm. In everyday terms, that is ≈ 51.9 hydrogen atoms.
- Size
- 5.5 nm
- In metres
- 5.50 × 10⁻⁹ m
- Everyday comparison
- ≈ 51.9 hydrogen atoms
- Chapter
- The Machinery of Life
Did you know?
The protein that carries oxygen around your body. Each red blood cell holds about 270 million of them.
How it compares
- About 2.7× bigger than DNA (width) (2 nm).
- About 2.2× smaller than Antibody (12 nm).
Other things of a similar size
- Gold atom 288 pm
- Glucose molecule 900 pm
- DNA (width) 2 nm
- Antibody 12 nm
- Ribosome 25 nm
- Coronavirus 90 nm
Sizes are rounded, typical values drawn from standard reference sources, including NIST/CODATA physical constants and NASA's planetary fact sheets. Real objects vary; see About for how sizes are chosen.