Units To lays out density units one to a row and amounts one to a column. Opened at pounds per cubic foot, it reads any amount of them at once in kilograms per cubic metre, grams per cubic centimetre, micrograms per cubic metre, milligrams per litre, milligrams per decilitre and every other density unit, even Saturns, Suns and gold. Type an amount the way you would say it, lay out a range of amounts, and choose how many decimal places to show.