Kitchen Measurement Conversions
Recipes don't agree on units. A cookbook from London calls for grams and millilitres. Your grandmother's index card just says "a cup" of shortening, no further explanation. Something you found online halves every quantity, and now you're doing fraction math on a third of two-thirds of a cup at 11pm. This site exists so you don't have to.
The calculator below converts by volume, weight, length, temperature and speed. It handles the whole range, from gallons down to milliliters, including the fraction-cup sizes (⅓ cup especially) that never land on a round number. Pick what you've got, pick what you need, and it converts in both directions.
A conversion is only half the job, though. A cup of flour can weigh anywhere from 4 to 6 ounces depending on how you scoop it, and an oven set to 350°F is a different dial setting in a UK recipe. The guides further down cover those traps in detail, with tables you can screenshot and numbers worked out by hand.
Quick answers
No. 12 — Volume & Liquid
Kitchen Conversions
Set an amount, pick what you have and what you need. Works both directions, gallons down to milliliters.
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How to use: Volume
Covers the everyday cooking units — teaspoons, tablespoons, cups (including the ½, ⅓, and ¼ sizes that never land on round numbers), pints, quarts, gallons, fluid ounces, milliliters, and liters. Set an amount, pick what you have and what you need — the result updates as you type.
Guides
Longer answers for the questions the calculator can't settle by itself.
Volume
Cups, Tablespoons & Teaspoons
The full ladder from teaspoon to gallon, butter-stick math, and how to halve or double any amount.
Weight
Cups to Grams
What a cup of flour, sugar, butter and honey actually weighs, and why the same cup differs.
Temperature
Oven Temperatures
Fahrenheit, Celsius and gas mark side by side, plus the fan-oven adjustment.
Length
Baking Pan Sizes
Inches to centimeters, which pans are interchangeable, and how to scale a recipe to a different pan.
Recipe of the Week
How the numbers work
This calculator is built and maintained directly, not licensed from a publisher. Every factor traces back to a standard definition: the US customary gallon, the international avoirdupois pound, the exact 25.4 mm inch. Where a figure on this site is rounded for readability, the calculator itself still gives you the fuller number. More about the site.