Microliter Definition

How Small Is a Microliter?

Microliter volumes are commonly dispensed using a micropipette into an eppendorf tube.
Microliter volumes are commonly dispensed using a micropipette into an eppendorf tube. Cultura RM Exclusive/GIPhotoStock, Getty Images

Microliter Definition

A microliter is a unit of volume equal to 1/1,000,000th of a liter (one-millionth). A microliter is one cubic millimeter.

The symbol for microliter is μl or μL.

1 μL = 10-6 L = 10-3 mL.

Alternate Spellings: microlitre
Plural: microliters, microlitres

The microliter is a small volume, yet measurable in a typical laboratory. An example of when you might use microliter volumes would be in preparation of an electrophoresis sample, when isolating DNA, or during chemical purification.

Microliters are measured and dispensed using micropipettes.

"My sample had a volume of 256 μL."