Number Conversion Calculators – Binary, Hex, Decimal, ASCII, Base & More
Instantly convert numbers and text: binary, decimal, hexadecimal, ASCII, fraction, percent, base64, scientific, roman numerals, ppm, radians, degrees and more. Essential number conversion tools for coding, science, school, and math!
Text, ASCII, Binary & Base Conversion
ASCII, Hex, Binary, Decimal, Base64 Converter
All-in-one: switch between ASCII, binary, hex, decimal, base64 and more.
ASCII Text to Binary
Plain English to full binary code instantly.
ASCII Text to Hex
String to hexadecimal value for coding/data.
Base Converter
Numbers from any base to any base—binary, octal, decimal, hex included!
Binary Converter
All binary transformations: decimal, string, hex, octal, and more.
Binary to ASCII Text
Binary code to readable ASCII text (reverse parsing).
Binary to Decimal
Fast switch: binary numbers to base-10 decimal.
Binary to Hex
Direct binary conversion into hex for programming/data.
Binary to Octal
Convert binary numbers to octal base for electronics.
Binary to String
Convert binary to text string—data and code recovery.
String to Binary
Convert regular strings/text to full binary code.
Decimal, Octal, Hex & Fraction/Percent Conversions
Decimal to Fraction
Convert base-10 decimal (0.0-1.0) to fraction format.
Decimal to Percent
Show decimals as a percent—scoring, data, school.
Decimal to Binary
Convert decimal to base-2 for computation/coding.
Decimal to Octal
Switch base-10 decimal numbers to octal base.
Decimal to Hex
Convert base-10 decimal to hex for CS/math use.
Fraction to Decimal
Turn simple fractions into decimal format.
Fraction to Percent
Fraction results as a percent—useful for exams.
Hex/Decimal/Octal/Binary Converter
Switch between number bases for software or embedded systems.
Hex to ASCII
Convert hex to readable ASCII for code/data work.
Hex to Binary
Hexadecimal to binary for encoding or signals.
Hex to Decimal
Switch from base-16 to base-10 for calculations or coding.
Hex to Octal
Convert hex to octal number—digital electronics/NC math.
Octal to Binary
Octal to base-2 for embedded or network coding tasks.
Octal to Decimal
Base-8 switch to base-10 in one click.
Octal to Hex
Base-8 to hex conversion for computer science.
Percent, PPM/PPB & Scientific Conversions
Percent to Decimal
Show percent numbers as decimals.
Percent to Fraction
Convert percents to top/bottom fractions.
Percent to ppm
Parts per million from percent for science/chemistry.
ppm to Percent
Parts per million to percent: quick environmental math.
ppm to ppb
Parts per million to parts per billion.
ppm to ppt
Parts per million to parts per trillion.
ppb to ppm
PPB to PPM for environmental, lab, or academic work.
ppt to ppm
Parts per trillion to million—ultra-small concentrations.
ppm Converter
All-in-one conversions for ppm, fraction, percent, and more.
Scientific Notation Converter
Convert to/from scientific notation for all value sizes.
Angles, Roman Numerals & Extra Tools
Degrees to Degrees, Minutes, Seconds
Break down angles for navigation, surveying, and astronomy.
DMS to Degrees
Degrees+minutes+seconds to decimal degrees.
Degrees to Radians
Angle conversions for math, engineering, trigonometry.
Radians to Degrees
Radians to standard degree format—class, physics, graphs.
Roman Numerals Converter
Convert numbers to and from Roman numerals for dates/data.
Date to Roman Numerals
Special: Change calendar dates to Roman numeral form.