Calc Zero Cooking, a free cooking calculator app for iPhone and iPad

Calc Zero: Cooking is a free member of the Calc Zero family, dedicated to cooking unit conversions.

Calc Zero: Cooking supports twenty different units used in cooking, including teaspoons, tablespoons, and cups (US and metric); pints, quarts, gallons; liters and milliliters, fluid ounces; pounds, ounces, grams, and kilograms; and Celsius and Fahrenheit.

As with all Calc Zero apps, unit conversions are fast and easy. Enter the number, tap the unit to convert from, and tap the unit to convert to.

As with all Calc Zero apps, math operations on like units are fully supported, so its easy to increase or decrease recipes.

And as with all Calc Zero apps, fractions are fully supported, and the Equals key is optional (i.e., you can use RPN mode if you prefer).