Precision scales are scales that are used to measure the weight of objects very accurately. These balances are very sensitive and can measure masses with an accuracy of 0.001 gram (1 mg) or less. Precision balances are commonly used in laboratories, research centers and other settings where high precision and reliability are required.

There are different types of precision balances, such as analytical balances, micro balances, semi-precision balances and others. Analytical balances are the most sensitive types of precision balances and are used to measure very small amounts of substances, such as chemicals in the laboratory. Micro balances are less sensitive and are used to measure small amounts of substances, such as microscopic samples and liquids. Semi-precision balances have lower accuracy than analytical and micro balances, but are still very accurate and are used to measure weight in some laboratory settings as well as industrial applications.

Precision scales can be digital or mechanical, and many today interface with a computer or other data processing system to ensure accurate measurements and eliminate human error. In laboratories, precision balances must be calibrated regularly to ensure their accuracy and reliability.