Units To lays out power units one to a row and amounts one to a column, so any amount reads in every unit at once: kilowatts, horsepower, metric horsepowers, watts, BTU per hour and megawatts, and for fun, 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.