Budgeting and personal finance, planning for retirement, buying a house, estimating travel and leisure expenses, estimating costs of home repair: modern life presents us with an array of calculations we need to make but may not know how. Now, with his trademark wry humor and simple language, Darrell Huff explains how to figure: the likely outcome of different investments; how much home insurance is enough; whether it makes more sense to buy or lease a new car; the most efficient way to save for future needs, from vacations to college tuition; air-conditioning and heating requirements for a new house; how many rolls of wallpaper you will need for a particular room; and much more. Here are tips for getting the most out of a modest pocket calculator or home computer to make tedious calcuations easy, a handy chapter on "Math in a Hurry," and even tips on improving your chances in tennis, horse racing, and blackjack.