About

Engineers, chefs, and logistics managers often face the friction of incompatible measurement systems. Accuracy becomes critical when dealing with international standards or legacy blueprints. A miscalculation in volume can ruin a chemical mixture. A misunderstanding of mass vs. weight can disrupt shipping logistics. This tool standardizes conversions across eight distinct physical dimensions.

It handles the nuances between US Customary and Imperial units, specifically regarding liquid volumes like gallons and fluid ounces. Precision extends to scientific units such as Angstroms and Parsecs for length, or Joules and BTUs for energy. The conversion logic uses high-precision floating-point arithmetic to minimize rounding errors in multi-step calculations.

Formulas

Most conversions follow a linear transformation relative to a base SI unit. Temperature is the notable exception due to offset scales.

General Linear Conversion:

Value_out = Value_in × Factor_inFactor_out

Where Factor represents the multiplier to convert the unit to the system base (e.g., meters for length).

Temperature (Fahrenheit to Celsius):

T_C = (

T_F − 32

× 59

This nonlinear relationship requires specific handling for intervals versus absolute readings.

Reference Data

Category	Unit Name	Symbol	Base Equivalence (Approx)
Length	Meter	m	1.0 Base
Length	Inch	in	0.0254 m
Mass	Kilogram	kg	1.0 Base
Mass	Pound (Avdp)	lb	0.45359237 kg
Volume	Liter	L	1.0 Base
Volume	Gallon (US)	gal	3.78541 L
Volume	Gallon (UK)	gal	4.54609 L
Area	Hectare	ha	10000 m²
Area	Acre	ac	4046.86 m²
Speed	Knot	kn	1.852 km/h
Temp	Fahrenheit	°F	T−321.8 °C
Energy	British Thermal Unit	BTU	1055.06 J
Pressure	PSI	psi	6894.76 Pa
Power	Horsepower (Mech)	hp	745.7 W

Frequently Asked Questions

The US Gallon (approx 3.78L) differs significantly from the Imperial/UK Gallon (approx 4.54L). Using the wrong one in chemical formulations or fuel calculations leads to a discrepancy of about 20%.

Yes. A Troy ounce is heavier than the standard Avoirdupois ounce used for groceries. One Troy ounce equals approximately 31.1 grams, whereas a standard ounce is 28.35 grams. This distinction is vital in financial markets.

A nautical mile is based on the circumference of the Earth (one minute of latitude) and equals exactly 1,852 meters. A standard (statute) mile is 1,609.34 meters. Aviation and maritime navigation strictly use nautical miles.

The tool utilizes standard 64-bit floating-point math. While sufficient for engineering, conversions involving extreme scales (like Parsecs to Angstroms) may experience minor floating-point artifacts at the 15th decimal place.

Storage manufacturers often use decimal (1 KB = 1000 bytes), while operating systems use binary (1 KiB = 1024 bytes). This tool defaults to the standard decimal prefixes (KB, MB) but separates binary prefixes (KiB, MiB) if explicitly selected.