Interesting fact: Most raindrops are not tear-shaped in flight. Small ones are nearly spherical, while larger ones flatten like tiny hamburger buns.
The answer: A typical raindrop weighs about 0.05 to 0.3 grams, depending on its diameter. A medium raindrop around 4 to 5 millimeters across is often close to one tenth of a gram.
Raindrops are small enough that weighing one directly is awkward, so scientists usually calculate mass from diameter and water density. Their weight matters because drop size controls how rain falls, how radar interprets storms, and how quickly water reaches soil, roofs, and rivers. Even tiny drops matter when billions of them are falling at once.
