Yes that’s very true.
Now on to the backend if Zac or you develops it; I don’t know JS by heart but I came up with a lil’ something for you if you want to see how it works 
export default [
{
type: "duration",
scale: "time",
symbols: [ "millisecond"],
si: 1 / 1000
},
{
type: "duration",
scale: "time",
symbols: [ "second"],
si: 1
},
{
type: "duration",
scale: "time",
symbols: ["minute"],
si: 60
},
{
type: "duration",
scale: "time",
symbols: ["hour"],
si: 60 * 60
},
{
type: "duration",
scale: "time",
symbols: ["day"],
si: 24 * 60 * 60
},
{
type: "duration",
scale: "time",
symbols: ["week"],
si: 7 * 24 * 60 * 60
},
{
type: "duration",
scale: "time",
symbols: ["month"],
si: 30 * 24 * 60 * 60
},
{
type: "duration",
scale: "time",
symbols: ["year"],
si: 365 * 24 * 60 * 60
},
{
type: "duration",
scale: "time",
symbols: ["decade"],
si: 10 * 365 * 24 * 60 * 60
},
{
type: "duration",
scale: "time",
symbols: ["century"],
si: 100 * 365 * 24 * 60 * 60
}
];
Now this is for Length:
‘
export default [
// Metric
{
type: "length",
scale: "metric",
symbols: [“millimeter"],
si: 1 / 1000
},
{
type: "length",
scale: "metric",
symbols: ["centimeter"],
si: 1 / 100
},
{
type: "length",
scale: "metric",
symbols: [“meter"],
si: 1
},
{
type: "length",
scale: "metric",
symbols: ["kilometer"],
si: 1000
},
// Imperial
{
type: "length",
scale: "imperial",
symbols: ["inch", '"'],
si: 1 / 39.3701
},
{
type: "length",
scale: "imperial",
symbols: ["yard"],
si: 1 / 1.09361
},
{
type: "length",
scale: "imperial",
symbols: ["foot", "feet", "'"],
si: 1 / 3.28084
},
{
type: "length",
scale: "imperial",
symbols: ["miles"],
si: 1609.34
}
];
Mass:
export default [
{
type: "mass",
scale: "metric",
symbols: ["ug"],
si: 1 / 1000000000
},
{
type: "mass",
scale: "metric",
symbols: ["mg"],
si: 1 / 1000000
},
{
type: "mass",
scale: "metric",
symbols: ["gram"],
si: 1 / 1000
},
{
type: "mass",
scale: "metric",
symbols: ["kilogram"],
si: 1
},
{
type: "mass",
scale: "metric",
symbols: ["t"],
si: 1000
},
// Imperial
{
type: "mass",
scale: "imperial",
symbols: ["oz"],
si: 1 / 35.274
},
{
type: "mass",
scale: "imperial",
symbols: ["lb"],
si: 1 / 2.20462
}
];