Function toBaseQuantity

toBaseQuantity(quantity: number, unit: UOM): number

Converts a quantity from its current unit to a common unit of mass or volume. This is to make it easier to compare quantities of different units.

Parameters

quantity: number
The quantity to convert
unit: UOM
The unit of measure of the quantity

Returns number

The converted quantity in its base unit

Example

toBaseQuantity(1, UOM.KG) // Returns 1000 (kilograms)
toBaseQuantity(1, UOM.LB) // Returns 453.592 (grams)
toBaseQuantity(1, UOM.G) // Returns 1 (no conversion needed)

Source

export function toBaseQuantity(quantity: number, unit: UOM): number {
  if (typeof quantity !== "number") return quantity;

  switch (unit) {
    // Solids, convert all to milligrams
    case UOM.MG:
      return quantity;
    case UOM.G:
      return quantity * 1000;
    case UOM.KG:
      return quantity * 1000000;
    case UOM.LB:
      return quantity * 453592;
    case UOM.OZ:
      return quantity * 28349.5; // Weight ounce, not fluid

    // Liquids, convert all to milliliters
    case UOM.ML:
      return quantity;
    case UOM.L:
      return quantity * 1000;
    case UOM.QT:
      return quantity * 946.353;
    case UOM.GAL:
      return quantity * 3785.41;
    case UOM.FLOZ:
      return quantity * 29.5735;

    // Countable units, no conversion
    case UOM.PCS:
    case UOM.EA:
      return quantity;

    default:
      console.debug(`${quantity} ${unit} -> ${quantity} ${unit} (no conversion found)`);
      return quantity;
  }
}