Estimate retail package postage with the Usps Ground Advantage Calculator by choosing a weight and delivery zone in seconds.

See preflop equity for pairs, big cards, and draws with the Holdem Equity Calculator, by hand class and number of opponents.

Turn your outs into exact flop and turn percentages with the Holdem Odds Calculator, including the odds against completing your draw.

Work out the price of any call with the Pot Odds Calculator: enter the pot and the bet to see your break-even percent and odds.

Compare lifetime annuity totals with the cash option using the Lucky For Life Payout Calculator for both prize tiers and horizons.

Use this Color Wheel Calculator to find complementary, analogous, triadic, and split-complementary colors from any hex code.

Use this Per Diem Calculator to work out lodging and meal allowances for a work trip, including reduced travel-day meal rates.

Use the Roman Numeral Calculator to convert numbers from 1 to 3999 into Roman numerals and turn Roman numerals back into numbers.

Use the Facial Harmony Calculator to check your facial proportions against the golden ratio and the rule of thirds in a few simple steps.

Use the Pert Calculator to turn optimistic, most likely, and pessimistic task times into one realistic expected duration and a likely range.