Package Exports

@iamsquare/convert-units

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Readme

iamsquare/convert-units

A handy utility for converting between quantities in different units.

Installation

npm i @iamsquare/convert-units

Usage

@iamsquare/convert-units is a functional port with extended type support of https://www.npmjs.com/package/convert-units.

Here's how you convert metric units for volume:

import { convert } from '@iamsquare/convert-units';

convert('l', 'ml', 1);
// 1000

Jump from imperial to metric units the same way:

convert('lb', 'kg', 1);
// 0.4536... (tested to 4 significant figures)

Just be careful not to ask for an impossible conversion!

convert('oz', 'fl-oz', 1);
// throws exception -- you can't go from mass to volume!

You can get a list of the measurement types supported with measures

measures();
// [ 'length', 'mass', 'volume', ... ]

If you ever want to know the possible conversions for a unit, just use possibilities

import { possibilities } = from '@iamsquare/convert-units';

possibilities('l');
// [ 'ml', 'l', 'tsp', 'Tbs', 'fl-oz', 'cup', 'pnt', 'qt', 'gal' ]

possibilities('kg');
// [ 'mcg', 'mg', 'g', 'kg', 'oz', 'lb' ]

You can also get the possible conversions for a measure:

possibilities('mass');
// [ 'mcg', 'mg', 'g', 'kg', 'oz', 'lb', 'mt', 't' ]

You can also get the all the available units:

possibilities();
// [ 'mm', 'cm', 'm', 'in', 'ft-us', 'ft', 'mi', ... ];

To get a detailed description of a unit, use describe

describe('kg');

{
  unitType: 'kg',
  measure: 'mass',
  system: 'metric',
  singular: 'Kilogram',
  plural: 'Kilograms'
}

To get detailed descriptions of all units, use list.

list();

[
  {
    unitType: 'kg',
    measure: 'mass',
    system: 'metric',
    singular: 'Kilogram',
    plural: 'Kilograms'
  },
  ...
]

You can also get detailed description of all units for a measure:

list('mass');

[
  {
    unitType: 'kg',
    measure: 'mass',
    system: 'metric',
    singular: 'Kilogram',
    plural: 'Kilograms'
  },
  ...
]

Supported Units

*Measure*	*Metric*	*Imperial*	*Other*
Length	nm, μm, mm, cm, m, km	in, yd, ft-us, ft, fathom, mi, nMi	-
Area	mm2, cm2, m2, ha, km2	in2, ft2, ac, mi2	-
Mass	mcg, mg, g, kg, mt	oz, lb, t	-
Volume	mm3, cm3, ml, l, kl, m3, km3	tsp, Tbs, in3, fl-oz, cup, pnt, qt, gal, ft3, yd3	-
Volume Flow Rate	mm3/s, cm3/s, ml/s, cl/s, dl/s, l/s, l/min, l/h, kl/s, kl/min, kl/h, m3/s, m3/min, m3/h, km3/s	tsp/s, Tbs/s, in3/s, in3/min, in3/h, fl-oz/s, fl-oz/min, fl-oz/h, cup/s, pnt/s, pnt/min, pnt/h, qt/s, gal/s, gal/min, gal/h, ft3/s, ft3/min, ft3/h, yd3/s, yd3/min, yd3/h	-
Temperature	C, K	F, R	-
Time	-	-	ns, mu, ms, s, min, h, d, week, month, year
Frequency	-	-	Hz, mHz, kHz, MHz, GHz, THz, rpm, deg/s, rad/s
Speed	m/s, km/h	mph, knot, ft/s	-
Pace	s/m, min/km	s/ft, min/mi	-
Pressure	Pa, hPa, kPa, MPa, bar, torr	psi, ksi	-
Digital	-	-	b, Kb, Mb, Gb, Tb, B, KB, MB, GB, TB
Illuminance	lx	ft-cd	-
Parts-Per	-	-	ppm, ppb, ppt, ppq
Voltage	-	-	V, mV, kV
Current	-	-	A, mA, kA
Power	W, mW, kW, MW, GW, PS	Btu/s, ft-lb/s, hp	-
Apparent Power	-	-	VA, mVA, kVA, MVA, GVA
Reactive Power	-	-	VAR, mVAR, kVAR, MVAR, GVAR
Energy	-	-	Wh, mWh, kWh, MWh, GWh, J, kJ
Reactive Energy	-	-	VARh, mVARh, kVARh, MVARh, GVARh
Angle	-	-	deg, rad, grad, arcmin, arcsec
Charge	-	-	c, mC, μC, nC, pC
Force	N, kN	lbf	-
Acceleration	g-force, m/s2	-	-
Pieces	-	-	pcs, bk-doz, cp, doz-doz, doz, gr-gr, gros, half-dozen, long-hundred, ream, scores, sm-gr, trio

NOTE: these units are exported as enums so that you don't have to remember which unit is which. Also, if you're using this library in a plain javascript environment these are useful to avoid annoying typos. To see a list of these enums take a look in here.

Want More?

Adding new measurement sets is easy. Take a look at src/definitions to see how it's done.

Dependencies

This library depends on ramda and ramda-extension.

These imports are not tree-shaken, so if you're bundling this library in a project please refer to your bundler's documentation. Note that Rollup and Webpack should handle tree-shaking without extra-effort.

To-do list

[ ]: port convertToBest functionality.
[ ]: extend and refactor tests.
[ ]: allow conversion between an arbitrary number of systems in the same measure family (eg. metric ↔ imperial ↔ ... ↔ [nth-system] ↔ metric).
[ ]: generate documentation (right now typedoc throws cryptic errors).

License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.