Conversions Calculators
Converters for the things a simple unit converter cannot handle: ingredient densities, numeral systems, oven settings and more.
- 9 tested calculators
- Formulas explained
- Private and free
Cups to Grams Converter
Baking conversions by ingredient.
Roman Numeral Converter
Numbers ↔ Roman numerals with breakdown.
Number Base Converter
Binary, octal, decimal and hex conversion.
Oven Temperature Converter
°C, °F, fan oven and gas mark.
Baker’s Percentage Calculator
Dough ingredients from baker’s percentages.
Pizza Dough Calculator
Dough recipe for any number of pizzas.
Yeast Converter
Fresh ↔ active dry ↔ instant yeast.
Turkey Cooking Time Calculator
Roasting and thawing times for a turkey.
Coffee Ratio Calculator
Grams of coffee for any brew method.
Conversions that need more than a factor
Some conversions cannot be done with a single number: a cup of flour weighs less than a cup of sugar, a fan oven runs hotter than a conventional one, and Roman numerals follow their own rules. These converters handle those details and include reference charts you can bookmark.
Which converter do you need?
- Baking by weight: cups to grams for flour, sugar, butter and more; baker’s percentage to scale bread recipes; pizza dough from the number of pizzas; yeast converter between fresh, active dry and instant.
- Cooking: oven temperatures in °C, °F, fan and gas mark; turkey cooking times with a thawing and roasting schedule; coffee to water ratios by brew method.
- Numbers: Roman numerals and binary, octal and hexadecimal.
Why kitchen conversions need care
Volume and weight are not interchangeable: a U.S. cup of all-purpose flour weighs about 120 g, while a cup of granulated sugar weighs about 200 g and a cup of water 237 g. How you fill the cup also matters — scooping flour from the bag can pack in 20–30% more than spooning it in. That’s why professional and European recipes use grams, and why a digital kitchen scale is the most useful upgrade for a home baker.
Cup sizes also vary by country: a U.S. cup is 236.6 ml, a metric cup (Australia, Canada, New Zealand) is 250 ml, and older British recipes may use a 284 ml imperial cup. Oven settings differ too: fan ovens cook about 20 °C (25 °F) hotter than conventional ones at the same dial setting.
Our reference values come from standard baking references, manufacturers’ data and food-safety guidance such as the USDA’s turkey roasting and thawing charts. Each converter shows the figures it uses so you can check them.