Note

Since Volts is defined as Rate Watts Amperes (power per unit current), you can do rate-related calculations with Voltage values to compute Power or Current:

     // elm-units version of 'P = V * I'
     power =
         current |> Quantity.at voltage
     // I = P / V
     current =
         power |> Quantity.at_ voltage

Just for fun, note that since you can also express Voltage in terms of Current and Resistance, you could rewrite the second example above as

     // P = I^2 * R
     let power =
         current
             |> Quantity.at
                 (current
                     |> Quantity.at resistance
                 )