The short answer: An average adult mosquito weighs only about 2.5 milligrams (roughly 0.00009 ounces), varying a little by species and sex.
Mosquito weight by type
Mosquito weight is tiny and depends on species, sex, and whether it has fed. Here are rough figures.
| Type (example) | Typical weight |
|---|---|
| Small species adult | About 1 to 2 mg |
| Average adult (Aedes, Culex) | About 2 to 2.5 mg |
| Larger species adult | About 3 to 5 mg |
| Female after a blood meal | Up to roughly 5 to 7 mg |
What affects mosquito weight
- Species. Mosquito species differ in body size, so weights range several-fold.
- Sex. Females are usually slightly larger and heavier than males.
- Blood meal. A fed female can more than double her weight temporarily.
- Larval nutrition. Better-fed larvae become larger, heavier adults.
- Temperature. Developmental conditions affect final adult body size.
How mosquito weight compares
A mosquito at about 2.5 milligrams weighs roughly a thousandth of a paperclip, far too light to feel when it lands.
Frequently asked questions
How much does a mosquito weigh after feeding?
After a full blood meal, a female mosquito can weigh roughly two to three times her empty weight, sometimes 5 to 7 milligrams.
Why are mosquitoes so light?
Mosquitoes are tiny insects only a few millimeters long, so even an adult weighs just a couple of milligrams.
Do male and female mosquitoes weigh the same?
Not quite. Females are usually a little larger and heavier than males, and they get much heavier after taking blood.
