Convert Dimensions of Measurement

Description

Converts between dimensions of measurement given a transition dimension (the dimension that "bridges" x and y, e.g. liters per second, lbs per acre). Note that 2 of the 3 measurements (x, y, or trans) must be defined to calculate the 3rd. See conv_unit_options for all options.

Usage

conv_dim(x, x_unit, trans, trans_unit, y, y_unit)

Arguments

Details

This function supports all dimensions in conv_unit_options except for coordinates. The conversion values have been defined based primarily from international weight and measurement authorities (e.g. General Conference on Weights and Measures, International Committee for Weights and Measures, etc.). While much effort was made to make conversions as accurate as possible, you should check the accuracy of conversions to ensure that conversions are precise enough for your applications.

Note

Duration

Years are defined as 365.25 days and months are defined as 1/12 a year.

Energy

cal is a thermochemical calorie (4.184 J) and Cal is 1000 cal (kcal or 4184 J).

Flow

All gallon-based units are US gallons.

Mass

All non-metric units are based on the avoirdupois system.

Power

hp is mechanical horsepower, or 745.69 W.

Speed

mach is calculated at sea level at 15 °C.

Author(s)

Matthew A. Birk, matthewabirk@gmail.com

See Also

conv_unit_options, conv_unit

Examples

# How many minutes does it take to travel 100 meters at 3 feet per second?
conv_dim(x = 100, x_unit = "m", trans = 3, trans_unit = "ft_per_sec", y_unit = "min")

# How many degrees does the temperature increase with an increase in 4 kPa given 0.8 Celcius
# increase per psi?
conv_dim(x_unit = "C", trans = 0.8, trans_unit = "C_per_psi", y = 4, y_unit = "kPa")

# Find the densities given volume and mass measurements.
conv_dim(x = c(60, 80), x_unit = "ft3", trans_unit = "kg_per_l", y = c(6e6, 4e6), y_unit = "g")

Convert Units of Measurement Composed of Multiple Units

Description

Converts complex units of measurement that are joined by " / " or " * ". This function supports all dimensions in conv_unit_options except for coordinates.

Usage

conv_multiunit(x = 1, from, to)

Arguments

Author(s)

Matthew A. Birk, matthewabirk@gmail.com

See Also

conv_unit, conv_unit_options, conv_dim

Examples

conv_multiunit(x = 10, from = "ft / hr * F", to = "m / min * C")
conv_multiunit(x = 1:100, from = "gal_per_min * ft / psi * hp", to = "l_per_hr * km / kPa * kW")

Convert Units of Measurement

Description

Converts common units of measurement for a variety of dimensions. See conv_unit_options for all options.

Usage

conv_unit(x, from, to)

Arguments

Details

Acceleration

mm_per_sec2, cm_per_sec2, m_per_sec2, km_per_sec2, grav, inch_per_sec2, ft_per_sec2, mi_per_sec2, kph_per_sec, mph_per_sec

Angle

degree, radian, grad, arcmin, arcsec, turn

Area

nm2, um2, mm2, cm2, m2, hectare, km2, inch2, ft2, yd2, acre, mi2, naut_mi2

Coordinate

dec_deg, deg_dec_min, deg_min_sec (see note)

Count

fmol, pmol, nmol, umol, mmol, mol

Duration

nsec, usec, msec, sec, min, hr, day, wk, mon, yr, dec, cen, mil, Ma

Energy

J, kJ, erg, cal, Cal, Wsec, kWh, MWh, BTU

File size

byte, KB, MB, GB, TB, PB, bit, Kbit, Mbit, Gbit, Tbit, Pbit

Flow

ml_per_sec, ml_per_min, ml_per_hr, l_per_sec, l_per_min, l_per_hr, m3_per_sec, m3_per_min, m3_per_hr, gal_per_sec, gal_per_min, gal_per_hr, ft3_per_sec, ft3_per_min, ft3_per_hr, Sv

Length

angstrom, nm, um, mm, cm, dm, m, km, inch, ft, yd, fathom, mi, naut_mi, au, light_yr, parsec, point

Mass

Da, fg, pg, ng, ug, mg, g, kg, Mg, Gg, Tg, Pg, carat, metric_ton, oz, lbs, short_ton, long_ton, stone

Power

uW, mW, W, kW, MW, GW, erg_per_sec, cal_per_sec, cal_per_hr, Cal_per_sec, Cal_per_hr, BTU_per_sec, BTU_per_hr, hp

Pressure

uatm, atm, Pa, hPa, kPa, torr, mmHg, inHg, cmH2O, inH2O, mbar, bar, dbar, psi

Speed

mm_per_sec, cm_per_sec, m_per_sec, km_per_sec, inch_per_sec, ft_per_sec, kph, mph, km_per_day, mi_per_day, knot, mach, light

Temperature

C, F, K, R

Torque

N-m, ft-lbs, inch-lbs

Volume

ul, ml, dl, l, cm3, dm3, m3, km3, us_tsp, us_tbsp, us_oz, us_cup, us_pint, us_quart, us_gal, inch3, ft3, mi3, imp_tsp, imp_tbsp, imp_oz, imp_cup, imp_pint, imp_quart, imp_gal

The conversion values have been defined based primarily from international weight and measurement authorities (e.g. General Conference on Weights and Measures, International Committee for Weights and Measures, etc.). While much effort was made to make conversions as accurate as possible, you should check the accuracy of conversions to ensure that conversions are precise enough for your applications.

Note

Duration

Years are defined as 365.25 days and months are defined as 1/12 a year.

Coordinate

Values must be entered as a string with one space between subunits (e.g. 70° 33’ 11” = "70 33 11").

Energy

cal is a thermochemical calorie (4.184 J) and Cal is 1000 cal (kcal or 4184 J).

Flow

All gallon-based units are US gallons.

Mass

All non-metric units are based on the avoirdupois system.

Power

hp is mechanical horsepower, or 745.69 W.

Pressure

cmH2O is defined at 4 °C.

Pressure

inH2O is defined at 60 °F.

Speed

mach is calculated at sea level at 15 °C.

Author(s)

Matthew A. Birk, matthewabirk@gmail.com

See Also

conv_unit_options, conv_dim

Examples

conv_unit(2.54, "cm", "inch") # Result = 1 inch

conv_unit(seq(1, 10), "kg", "short_ton") # A vector of measurement values can be converted

# Convert 1, 10, and 100 meters to all other length units
sapply(conv_unit_options$length, function(x) conv_unit(c(1, 10, 100), "m", x))

conv_unit("33 1 1", "deg_min_sec", "dec_deg")

conv_unit(c("101 44.32","3 19.453"), "deg_dec_min", "deg_min_sec")

Unit of Measurement Conversion Options

Description

Shows what units of measurement can be converted with the function conv_unit.

Usage

conv_unit_options

Format

A list with all units available for conversion using conv_unit.

Details

Duration

Years are defined as 365.25 days and months are defined as 1/12 a year.

Coordinate

Values must be entered as a string with one space between subunits (e.g. 70° 33’ 11” = "70 33 11").

Energy

cal is a thermochemical calorie (4.184 J) and Cal is 1000 cal (kcal or 4184 J).

Mass

All non-metric units are based on the avoirdupois system.

Power

hp is mechanical horsepower, or 745.69 W.

Pressure

cmH2O is defined at 4 °C.

Pressure

inH2O is defined at 60 °F.

Speed

mach is calculated at sea level at 15 °C.

Author(s)

Matthew A. Birk, matthewabirk@gmail.com

Source

The conversion values have been defined based primarily from international weight and measurement authorities (e.g. General Conference on Weights and Measures, International Committee for Weights and Measures, etc.). While much effort was made to make conversions as accurate as possible, you should check the accuracy of conversions to ensure that conversions are precise enough for your applications.

See Also

conv_unit

Examples

conv_unit_options
conv_unit_options$pressure

Tools for Units of Measurement

Description

Collection of tools to make working with physical measurements easier. Convert between metric and imperial units, or calculate a dimension's unknown value from other dimensions' measurements.

Author(s)

Matthew A. Birk, matthewabirk@gmail.com