@thi.ng/units/units/energy.js

Extensible SI unit creation, conversions, quantities & calculations (incl. ~170 predefined units & constants)

import { N } from "./force.js";
import { m } from "./length.js";
import { defUnit, mul, prefix } from "../unit.js";
const J = defUnit("J", "joule", mul(N, m, true));
const kJ = defUnit("kJ", "kilojoule", prefix("k", J));
const MJ = defUnit("MJ", "megajoule", prefix("M", J));
const GJ = defUnit("GJ", "gigajoule", prefix("G", J));
const cal = defUnit("cal", "calorie", mul(J, 4.184, true));
const kcal = defUnit("kcal", "kilocalorie", prefix("k", cal));
export {
  GJ,
  J,
  MJ,
  cal,
  kJ,
  kcal
};