Units To lays out power units one to a row and amounts one to a column. Opened at megawatts, it reads any amount of them at once in kilowatts, horsepower, metric horsepowers, watts, BTU per hour and every other power unit, even light bulbs, humans at rest, toasters and flux capacitors. Type an amount the way you would say it, lay out a range of amounts, and choose how many decimal places to show.