isqx.usc
Definitions for U.S. customary and British imperial units (feet, slugs, pound force etc.).
The public API is the isqx.usc module.
United States customary and British Imperial units.
See: isqx._citations.SP811, isqx._citations.H44, isqx._citations.WMA1985.
FAHRENHEIT = Translated(
R, Decimal("-459.67"), "fahrenheit"
)
Thermodynamic Temperature (Fahrenheit). Absolute, translated scale. Cannot be composed with other units.
U.S. survey foot, deprecated since Dec 31, 2022.
Thousandth of an inch, a unit of thickness (also known as thou).
SQ_BUILDING = (100 * SQ_FT).alias('square_building')
Square building, used in the U.S. construction industry.
CIRCULAR_MIL = (LazyProduct((PI, (4, -1))) * SQ_MIL).alias(
"circular_mil"
)
Circular mil, a unit of area for wire cross-sections.
U.S. customary tablespoon.
TEASPOON = (Fraction(1, 3) * TABLESPOON).alias(
"teaspoon_measuring"
)
U.S. customary teaspoon.
BBL_FEDERAL_FERMENTED_LIQUOR = (31 * GAL).alias(
"bbl_federal_fermented_liquor"
)
BBL_OIL = (42 * GAL).alias('bbl_oil', allow_prefix=True)
U.S. standard barrel for crude oil and petroleum products.
U.S. heaped bushel.
BBL_DRY = (7056 * CU_IN).alias('bbl_dry')
U.S. standard barrel for fruits, vegetables and dry commodities (excluding cranberries).
BBL_CRANBERRY = (5826 * CU_IN).alias('bbl_cranberry')
U.S. standard barrel for cranberries.
British Imperial quart.
British Imperial fluid ounce.
British Imperial fluid drachm.
SCRUPLE_FL_IMP = (Fraction(1, 3) * DRACHM_FL_IMP).alias(
"scruple_fluid_imperial"
)
British Imperial fluid scruple.
MINIM_IMP = (Fraction(1, 20) * SCRUPLE_FL_IMP).alias(
"minim_imperial"
)
British Imperial minim.
Volume of water that covers one acre to a depth of one foot.
WATER_TON = (224 * GAL_IMP).alias('water_ton')
Water ton, an English unit of volume, approximately the volume of a long ton of water.
Grain. Equivalent across Avoirdupois, Troy, and Apothecaries' systems.
Assay ton. The mass in milligrams of precious metal from one assay ton of ore gives the troy ounces per short ton.
QUINTAL = (100 * KG).alias('quintal')
Quintal, a historical unit of mass, now usually 100 kg.
Poundal, the force required to accelerate 1 lb by 1 ft/s².
INHG = (
LazyProduct((CONST_DENSITY_HG, CONST_STANDARD_GRAVITY))
* IN
).alias("inch_of_hg")
Inch of mercury, a unit of pressure.
INH2O = (
LazyProduct((CONST_DENSITY_H2O, CONST_STANDARD_GRAVITY))
* IN
).alias("inch_of_h2o")
Inch of water (conventional), a unit of pressure.
Inch of water at 4 °C (temperature of maximum water density).
Inch of water at 60 °F.
A unit of mass that accelerates by 1 ft/s² when a force of 1 lbf is exerted on it.
Calorie (mean). The heat required to raise 1 g of water from 0 °C to 100 °C, divided by 100.
Calorie (at 15 °C). The heat required to raise 1 g of water from 14.5 °C to 15.5 °C.
Calorie (at 20 °C). The heat required to raise 1 g of water from 19.5 °C to 20.5 °C.
British thermal unit (International Table). The most widely used definition.
British thermal unit (mean, from 32 °F to 212 °F, divided by 180).
British thermal unit (at 59 °F). Used for American natural gas pricing.
QUAD = (10 ** 15 * BTU_IT).alias('quad')
Quad (International Table). Used by U.S. Department of Energy.
Mechanical horsepower (imperial). See: https://en.wikipedia.org/wiki/Horsepower#Imperial_horsepower
Metric horsepower. See: https://en.wikipedia.org/wiki/Horsepower#Metric_horsepower_(PS,_KM,_cv,_hk,_pk,_k,_ks,_ch)