I tried several online tools for calculating ratios, but none of them worked well... So I wrote some JS code to iterate through them... You can also modify the parameters for other sizes... I guess...
(() => {
const iList = [
[16, 9],
[5, 4],
[5, 3],
[4, 3],
[3, 2],
[3, 1],
[2, 1],
];
const wList = [640, 960, 1024, 1280, 1366, 1440];
let strRlt = "";
iList.forEach((i) => {
strRlt += "__" + i.join("__x__");
strRlt += `\n(Width / Height) = ` + i[0] / i[1];
strRlt += "\n";
wList.forEach((w) => {
h = (w / i[0]) * i[1];
if (h == parseInt(h)) {
strRlt += `${w} x ${h}`;
strRlt += "\n";
}
});
strRlt += "\n";
});
console.log(strRlt);
})();
Execution result:
__16__x__9
(Width / Height) = 1.7777777777777777
640 x 360
960 x 540
1024 x 576
1280 x 720
1440 x 810
__5__x__4
(Width / Height) = 1.25
640 x 512
960 x 768
1280 x 1024
1440 x 1152
__5__x__3
(Width / Height) = 1.6666666666666667
640 x 384
960 x 576
1280 x 768
1440 x 864
__4__x__3
(Width / Height) = 1.3333333333333333
640 x 480
960 x 720
1024 x 768
1280 x 960
1440 x 1080
__3__x__2
(Width / Height) = 1.5
960 x 640
1440 x 960
__3__x__1
(Width / Height) = 3
960 x 320
1440 x 480
__2__x__1
(Width / Height) = 2
640 x 320
960 x 480
1024 x 512
1280 x 640
1366 x 683
1440 x 720