arial character widths

charwidths.js

var d1 = document.createElement("div");
d1.id = "test3";
d1.innerHTML = "test";
d1.style = "width: fit-content; padding: 0px; margin: 0px; font-family: Arial, sans-serif;";
document.documentElement.appendChild(d1);

var d2 = document.createElement("div");
d2.id = "test3";
document.documentElement.appendChild(d2);

d2.innerHTML = "";
var N = 100;
for (var i = 32; i < 127; i++) {
  var s = String.fromCharCode(i).replace(" ","&nbsp;");
  d1.innerHTML = s.repeat(N);
  var width = d1.getBoundingClientRect().width;
  d2.innerHTML += `"${s}": ${width/N},<br>`;
}

Awesome, thanks!