Units To lays out density units one to a row and amounts one to a column, so any amount reads in every unit at once: kilograms per cubic metre, pounds per cubic foot, grams per cubic centimetre, micrograms per cubic metre, milligrams per litre and milligrams per decilitre, and, just to be silly, 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.