1. Abbreviated qt.

2. A unit of volume used for measurement of liquid substances in the United States, equal to 2 pints, or ¹/₄ gallon, or 57³/₄ cubic inches, or 9.46352946 × 10^-4 cubic meter.

3. A unit of volume used for measurement of solid substances in the United States, equal to 2 dry pints, or ¹/₃₂ bushel, or 107,521/1600 cubic inches, or approximately 1.10122 × 10^-3 cubic meter.

4. A unit of volume used for measurement of both liquid and solid substances, although mainly the former, in the United Kingdom, equal to 2 U.K. pints, or ¹/₄ U.K. gallon, or approximately 1.13652 × 10^-3 cubic meter.