simple-units

unit converter with focus on the golden mean between simplicity, customizability and performance

Key Features

Converting

const converted = units.from(3, "cm").to("in");
console.log(converted);
// Output: 1.1811

Comparing

const c1 = units.Convertible(100, "kilometer");
const c2 = units.Convertible(1000, "meter");

if (c1.lt(c2)) {
    console.log(`${c1} is less than ${c2}!`);
} else if (c1.eq(c2)) {
    console.log(`${c1} and ${c2} are equal!`);
} else {
    console.log(`${c1} is greater than ${c2}!`);
}
// Output: 100km is greater than 1000m!

Formatting

const convertible = units.Convertible(12.2323123, "kt");
console.log(convertible.format("%.2f %s", { length: "long" }));
// Output: 12.23 knots

Customizing

const myCustomUnit = new Unit(...);

units.group("length").Editor.add(myCustomUnit);

Documentation

Read useful guides here. Read the full documentation here.

Why simple-units?

simple-units is one of the fastest unit converters (see performance tests) while being the most flexible and easiest one. It's designed to feel natural. Added to that as adding custom units to simple-units is very simple, you are not dependend on the package developer (!). Last but not least it supports a huge amount of units and powerful functionality like comparing quantities of different units or formatting them nicely.

Supported Units

Area

Current

Digital

Energy

Force

Length

Mass

Parts-Per

Power

Pressure

Speed

Temperature

Time

Voltage

Volume