A burette (also written buret) is a graduated glass tube with a tap at one end used to deliver known volumes of liquid, particularly in titrations. It is a long, graded glass tube with a stopcock at the bottom and a tapering capillary tube at the output. The stopcock valve controls the flow of liquid from the tube to the burette tip.

A burette is a volumetric measuring glassware used in analytical chemistry to accurately dispense liquids, particularly reagents in titrations. The burette tube has graded marks that allow user to calculate the volume of liquid delivered. A burette has comparable precision to a volumetric pipette when used to its full capacity, but because it is typically used to deliver less than its entire capacity, it is somewhat less exact than a pipette.

The burette is used to measure the volume of a dispensed material, however unlike a graduated cylinder, its graduations flow from top to bottom. As a result, the difference between the beginning and end volumes equals the quantity discharged. The burette's accuracy and control over other methods of adding solution make it ideal for titration.