Unit converting with pure functions and a factory

convert.ts

export const fromCToK = (value: number) => value * 1.8 + 32
export const fromCToF = (value: number) => value + 273.15

export const fromFToC = (value: number) => (value - 32) / 1.8
export const fromFToK = (value: number) => fromFToK(value) + 273.15

export const fromKToC = (value: number) => value - 273.15
export const fromKToF = (value: number) => (value * 1.8) - 459.67

export const convert = (value: number) => ({
  from: {
    c: {
      to: {
        k: () => fromCToK(value),
        f: () => fromCToF(value),
      }
    },
    f: {
      to: {
        c: () => fromFToC(value),
        k: () => fromFToK(value)
      }
    },
    k: {
      c: () => fromKToC(value),
      f: () => fromKToF(value)
    }
  }
})