ConvUnit: Unit Conversion and Metrix Prefixes

In DescTools: Tools for Descriptive Statistics

Unit Conversion and Metrix Prefixes

Description

Converts a numerical vector from one measurement system to another. Metric prefixes (as unit prefixes that precede a basic unit of measure to indicate a multiple or fraction of the unit) are respected.

Usage

CmToPts(x)
PtsToCm(x)

ConvUnit(x, from, to)

data(d.units)
data(d.prefix)

Arguments

x	the numeric to be converted.
from	a character defining the original unit.
to	a character defining the target unit.

Details

The two functions CmToPts() and PtsToCm() convert centimeters to points and vice versa. 1 cm corresponds to 28.35 points.

The units as defined by the International System of Units (SI) (m, g, s, A, K, mol, cd, Hz, rad, sr, N, Pa, J, W, C, V, F, Ohm, S, Wb, T, H, lm, lx, Bq, Gy, Sv, kat, l) can be used to convert between different prefixes. The following non SI-units can be chosen for conversion between different systems. NA will be returned if a conversion can't be found.
The function is using the conversion factors stored in the dataset d.units.

Weight and mass
Gram	g	metric
Pound mass (avoirdupois)	lb
Ounce mass (avoirdupois)	oz
Metric ton	ton (or tn)
Distance
Meter	m	metric
Statute mile	mi
Nautical mile	nmi
Inch	in
Foot	ft
Yard	yd
Angstrom	AA	(accepted) metric
Astronomical unit	au
Time
Year	a
Day	d
Hour	h
Minute	min
Second	s
Pressure
Pascal	Pa
Atmosphere	atm
mm of Mercury	mmHg
bar	bar
Pound-force per quare inch	psi
Energy
Joule	J	metric
IT calorie	cal	(accepted) metric
Electron volt	eV (or ev)
Power
Horsepower (mechanical)	hp
Horsepower (metric)	HP
Watt	W (or w)	metric
Temperature
Degree Celsius	C
Degree Fahrenheit	F
Kelvin	K	metric
Liquid measure
Fluid ounce	fl oz
Gallon	gal
Liter	l (or lt)	(accepted) metric

Additional details can be found in the d.units data.frame.

Author(s)

Andri Signorell <[e-mail]>

Examples

ConvUnit(c(1.2, 5.4, 6.7), "in", "m")

# from kilometers to pico meters
ConvUnit(1, from="km", to="pm")

# from miles to kilometers
ConvUnit(1, from="mi", to="km")
# nautical miles
ConvUnit(1, from="nmi", to="km")
# from kilo Kelvin to Fahrenheit
ConvUnit(10, from="kK", to="F")
# from metric to more quirky units
ConvUnit(c(10, 1), from="hl", to="gal")
ConvUnit(500, from="ml", to="fl oz")

# conversion between non-SI units
ConvUnit(1000, "yd", "mi")
# ... must be the same as
ConvUnit(ConvUnit(1000, "yd", "m"), "m", "mi")

DescTools documentation built on Sept. 26, 2024, 1:07 a.m.