@thi.ng/units/units/pressure.js

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

import { m2 } from "./area.js";
import { N } from "./force.js";
import { defUnit, div, mul, prefix } from "../unit.js";
const Pa = defUnit("Pa", "pascal", div(N, m2, true));
const kPa = defUnit("kPa", "kilopascal", prefix("k", Pa));
const MPa = defUnit("MPa", "megapascal", prefix("M", Pa));
const GPa = defUnit("GPa", "gigapascal", prefix("G", Pa));
const at = defUnit("at", "technical atmosphere", mul(Pa, 98066.5));
const atm = defUnit("atm", "atmosphere", mul(Pa, 101325));
const bar = defUnit("bar", "bar", mul(Pa, 1e5, true));
const psi = defUnit("psi", "pound per square inch", mul(Pa, 6894.757));
export {
  GPa,
  MPa,
  Pa,
  at,
  atm,
  bar,
  kPa,
  psi
};