Number Tools & Calculators
Convert number bases, work with exact fractions, percentages, ratios, integers and scientific notation directly in your browser.
Popular tools
Binary to Decimal — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Decimal to Binary — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Roman Numeral Converter — undefined Calculations run in your browser. Entered values are not uploaded to our server.
Decimal to Fraction — Calculate with exact fractions. Calculations run in your browser. Entered values are not uploaded to our server.
Percentage Calculator — Calculate percentages without hidden server requests. Calculations run in your browser. Entered values are not uploaded to our server.
Fraction Simplifier — Calculate with exact fractions. Calculations run in your browser. Entered values are not uploaded to our server.
GCD Calculator — Inspect integer relationships. Calculations run in your browser. Entered values are not uploaded to our server.
Prime Number Checker — Inspect integer relationships. Calculations run in your browser. Entered values are not uploaded to our server.
Scientific Notation Converter — Convert number notation cleanly. Calculations run in your browser. Entered values are not uploaded to our server.
Categories
Exact binary, decimal, hexadecimal, octal and base 2–36 converters.
Convert, simplify and calculate fractions with exact rational arithmetic.
Calculate percentages, increases, decreases and percentage change.
GCD, LCM, ratios, prime checks and factors with explicit input guards.
Roman numerals, scientific notation and expanded number form.
All tools
Binary to Decimal — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Decimal to Binary — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Hex to Decimal — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Decimal to Hex — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Binary to Hex — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Hex to Binary — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Octal to Decimal — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Decimal to Octal — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Binary to Octal — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Octal to Binary — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Base Converter — Convert number systems exactly. Calculations run in your browser. Entered values are not uploaded to our server.
Roman Numeral Converter — undefined Calculations run in your browser. Entered values are not uploaded to our server.
Fraction to Decimal — Calculate with exact fractions. Calculations run in your browser. Entered values are not uploaded to our server.
Decimal to Fraction — Calculate with exact fractions. Calculations run in your browser. Entered values are not uploaded to our server.
Fraction Simplifier — Calculate with exact fractions. Calculations run in your browser. Entered values are not uploaded to our server.
Mixed Number to Improper Fraction — Calculate with exact fractions. Calculations run in your browser. Entered values are not uploaded to our server.
Improper Fraction to Mixed Number — Calculate with exact fractions. Calculations run in your browser. Entered values are not uploaded to our server.
Fraction Calculator — Calculate with exact fractions. Calculations run in your browser. Entered values are not uploaded to our server.
Percentage Calculator — Calculate percentages without hidden server requests. Calculations run in your browser. Entered values are not uploaded to our server.
Percentage Increase Calculator — Calculate percentages without hidden server requests. Calculations run in your browser. Entered values are not uploaded to our server.
Percentage Decrease Calculator — Calculate percentages without hidden server requests. Calculations run in your browser. Entered values are not uploaded to our server.
Percentage Change Calculator — Calculate percentages without hidden server requests. Calculations run in your browser. Entered values are not uploaded to our server.
Ratio Simplifier — Inspect integer relationships. Calculations run in your browser. Entered values are not uploaded to our server.
GCD Calculator — Inspect integer relationships. Calculations run in your browser. Entered values are not uploaded to our server.
LCM Calculator — Inspect integer relationships. Calculations run in your browser. Entered values are not uploaded to our server.
Prime Number Checker — Inspect integer relationships. Calculations run in your browser. Entered values are not uploaded to our server.
Factors Calculator — Inspect integer relationships. Calculations run in your browser. Entered values are not uploaded to our server.
Scientific Notation Converter — Convert number notation cleanly. Calculations run in your browser. Entered values are not uploaded to our server.
Standard & Expanded Form Converter — Convert number notation cleanly. Calculations run in your browser. Entered values are not uploaded to our server.
No matching tools.