Fractions & Decimals Calculator

Type the whole number followed by a space and the fraction. For example, 2 1/3 means two and one third, and -1 3/4 means negative one and three quarters.

Place the repeating digits inside parentheses. For example, 0.(3) means 0.333..., and 1.2(34) means 1.2343434.... Decimal output that repeats is detected automatically and written back in the same notation.

Addition +, subtraction -, multiplication * or ×, division / or ÷, and powers ^, including negative exponents. Parentheses group complex expressions.

Exact mode keeps a result in precise fractional form instead of a decimal approximation, which matters when an exact rational answer is needed rather than a rounded one.

The Fractions & Decimals Calculator combines two numbers under a chosen operation. The Fraction to Decimal Converter instead takes a single number, rounds it to the nearest denominator from 1/2 through 1/256, and renders it in several equivalent forms at once: reduced fraction, mixed number, decimal, percent, scientific notation, and LaTeX.

Results can be copied as plain text or as LaTeX, ready to paste into homework, teaching materials, or technical documents.

A number converts into:

• Reduced fraction (lowest terms)
• Mixed number
• Decimal (with adjustable precision)
• Percent
• Scientific notation
• LaTeX formatted output

Yes. An advanced "prefer improper fractions" option displays 7/3 instead of 2 1/3.

Zero as a denominator is invalid. Parentheses in expressions and in repeating decimals must be closed for the input to parse.

The fractions and decimals calculator performs arithmetic on fractions, mixed numbers, decimals, and repeating decimals using rational, BigInt-backed arithmetic rather than floating-point math, so results carry no rounding drift. A companion fraction to decimal converter takes a single number and renders it in several equivalent forms at once. Both tools support exact mode and adjustable precision.

• Values can be entered individually or as a full expression, such as (3/4 + 1.2) × 2 - 1/3.
• Supported operations are addition, subtraction, multiplication, division, and integer powers, including negative exponents.
• Results can be read as a fraction, a mixed number, or a decimal.
• Decimal precision is adjustable from 2 to 12 places.
• Exact mode keeps the result in exact rational form rather than a rounded decimal.
• Results copy as plain text or LaTeX for direct use in documents.
• Converting a fraction to a decimal is division of numerator by denominator.
• The reverse check, for decimal to fraction, is numerator = decimal × denominator.

The two calculators serve education, everyday math, and professional work wherever precise fraction and decimal conversions matter.

• Check homework and practice problems that involve fractions, mixed numbers, or decimals.
• Convert recurring decimals such as 0.(3) into exact fractions for teaching or study.
• Calculate ratios, proportions, and powers in STEM coursework.
• Adjust recipes or measurements by converting between fractional and decimal units.
• Prepare LaTeX-ready math output for assignments, research, or publications.
• Verify calculations in fields such as construction, finance, or engineering where precision matters.