The short answer: A typical snowflake weighs around 1 to 3 milligrams (about 0.00004 to 0.0001 ounces), though the exact figure varies widely with size and shape.
Snowflake weight by type
A snowflake is a delicate ice crystal formed as water vapor freezes in the atmosphere. Because they are so light and fragile, their weight is estimated rather than measured one by one.
| Snowflake type (example) | Approximate weight |
|---|---|
| Tiny single crystal | less than 1 mg |
| Typical branched flake | about 1–3 mg |
| Large dendritic flake | a few milligrams |
| Clumped flake cluster | noticeably heavier |
What affects snowflake weight
- Size. Larger crystals naturally weigh more than tiny ones.
- Branching. Intricate dendritic shapes can trap more ice and air.
- Moisture. Wetter conditions produce heavier, more rounded flakes.
- Clumping. Several flakes sticking together weigh far more than one.
- Temperature. The temperature during formation shapes crystal size and form.
How snowflake weight compares
At a few milligrams, a single snowflake weighs about a thousandth of a paperclip, which is why a gentle snowfall feels almost weightless until it piles up.
Frequently asked questions
Why is a snowflake so light?
A snowflake is a tiny, delicate ice crystal with lots of open space in its structure. That airy form keeps its weight to just a few milligrams.
Why are no two snowflakes alike?
Each flake takes a unique path through different temperatures and humidity as it forms. Those varying conditions shape its branches differently, so no two are exactly the same.
How do scientists know a snowflake's weight?
Weighing one directly is extremely difficult, so estimates come from measuring crystal size and ice density. Typical flakes work out to around 1 to 3 milligrams.
