modern/src/common/converter.js


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const speedConverter = (unit) => {
  switch (unit) {
    case 'kmh':
      return 1.852;
    case 'mph':
      return 1.15078;
    case 'kn':
    default:
      return 1;
  }
};

const distanceConverter = (unit) => {
  switch (unit) {
    case 'mi':
      return 0.000621371;
    case 'nmi':
      return 0.000539957;
    case 'km':
    default:
      return 0.001;
  }
};

export const speedFromKnots = (value, unit) => value * speedConverter(unit);

export const speedToKnots = (value, unit) => value / speedConverter(unit);

export const distanceFromMeters = (value, unit) => value * distanceConverter(unit);

export const distanceToMeters = (value, unit) => value / distanceConverter(unit);