Scale recipe quantities
Scale an ingredient list by servings or by the amount of one ingredient available. Select a reference ingredient from your list when working backwards.
MAKE THE FORMULA CLEAR
Fractions and decimal conversion
Add, subtract, multiply or divide two fractions, or convert finite decimals and mixed numbers. Choose a mode before entering its values.
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Fraction in lowest terms
5/6
Results are reduced to lowest terms. A mixed number's minus sign applies to the entire number, not only its whole-number part.
Decimal value0.833333
Reduces the result to lowest terms, placing any minus sign in the numerator.
Method and scope
Addition and subtraction use common denominators; multiplication multiplies numerators and denominators, and division uses the reciprocal. Results are reduced by the greatest common divisor; decimal mode reduces the entered decimal string exactly.
The improper-fraction mode also displays a mixed number and an approximate decimal. A mixed-number sign applies to the whole number, not just its integer part.
Denominators cannot be zero, and division cannot use a second fraction with zero numerator. Finite decimal input allows up to 12 decimal places, not repeating decimals or scientific notation; mixed-number numerators must be smaller than denominators.
What this helps you do
Add, subtract, multiply or divide two fractions, or convert finite decimals and mixed numbers. Choose a mode before entering its values.
What to enter
Start with first numerator, then fill the other relevant fields in the units shown. Available calculations are Arithmetic on two fractions, Finite decimal to reduced fraction, Mixed number to improper fraction, First fraction to mixed number and decimal.
How the calculation works
Addition and subtraction use common denominators; multiplication multiplies numerators and denominators, and division uses the reciprocal. Results are reduced by the greatest common divisor; decimal mode reduces the entered decimal string exactly.
Worked example
One half plus one third equals five sixths. In decimal mode, 0.125 becomes 1/8; a negative mixed number with whole part 2 and fraction 1/3 becomes -7/3.
Understanding the answer
The improper-fraction mode also displays a mixed number and an approximate decimal. A mixed-number sign applies to the whole number, not just its integer part.
Scope and limitations
Denominators cannot be zero, and division cannot use a second fraction with zero numerator. Finite decimal input allows up to 12 decimal places, not repeating decimals or scientific notation; mixed-number numerators must be smaller than denominators.