All weights › Atoms

How much does an electron weigh?

9.11 × 10⁻³¹ kg

An electron has a mass of about 9.11 × 10⁻³¹ kg.

Atomic masses converted to kilograms, for the very smallest puzzles.

How heavy is that?

• It takes about 1,800 electrons to balance a hydrogen atom.

About the same weight

• Ant 1 mg
• Mosquito 2.5 mg
• Sesame seed 3 mg
• Housefly 15 mg

More atoms

• Proton 1.67 × 10⁻²⁷ kg
• Hydrogen atom 1.67 × 10⁻²⁷ kg
• Helium atom 6.65 × 10⁻²⁷ kg