Number Tools

Abundant Number Test

Check whether a number is abundant: smaller than the sum of its proper divisors.

Abundant Numbers Generator

Generate abundant numbers: n with sigma(n) > 2n, where divisors overflow: 12, 18

Add Errors to Numbers - Modify Numbers So They Are Almost the Same but Contain Errors

Add errors to numbers - corrupt them so they are nearly identical but slightly w

Almost Perfect Numbers Generator

Generate almost perfect numbers: n with sigma(n) = 2n - 1, all known examples be

Analyze a Number – Digit Frequency, Math Properties & Number Insights

Free number analyzer. Paste any whole number and instantly see digit frequency,

Arithmetic Progression Generator

Quickly generate an arithmetic progression (AP) series. Enter the starting numbe

Average Calculator

Compute the average of any list of numbers with mean, median, mode, range, stand

Baum-Sweet Numbers Generator

Generate Baum-Sweet numbers: b(n) = 1 when the binary form of n has no odd-lengt

Binary, Hex, Octal Converter

Free binary, hex, octal and decimal converter. Convert any whole number between

Braille Numbering Generator

Generate numbered Braille cell sequences from ⠂ to thousands, using the standard

Calculate Percentages

Find x% of any number instantly - plus the reverse calculations: what percent on

Change Number Exponent - Change the Power of a Number

Change the exponent of a number - rewrite it in a new power of ten: mantissa x 1

Change Number Font - Write Numbers in a Different Font

Change number font - restyle any number using Unicode mathematical fonts: bold,

Change Number Mantissa - Change the Significand of a Number

Change the mantissa (significand) of a number - pick how many significant digits

Composite Numbers Generator

Generate composite numbers - every integer with more than two divisors: 4, 6, 8,

Convert Any Number to Any Base

Convert a number from any base to any other base - choose the source and target

Convert a Binary Number to Decimal Number

Convert binary numbers to decimal - enter Binary values and get the exact decima

Convert a Binary Number to Hex Number

Convert binary numbers to hexadecimal - enter Binary values and get the exact he

Convert a Binary Number to Octal Number

Convert binary numbers to octal - enter Binary values and get the exact octal eq

Convert a Decimal Number to Binary Number

Convert decimal numbers to binary - enter Decimal values and get the exact binar

Convert a Decimal to a Fraction

Convert a decimal to a fraction - enter any decimal including repeating forms li

Convert a Decimal Number to Hex Number

Convert decimal numbers to hexadecimal - enter Decimal values and get the exact

Convert a Decimal Number to Octal Number

Convert decimal numbers to octal - enter Decimal values and get the exact octal

Convert a Fraction to a Decimal

Convert a fraction to a decimal - enter a numerator and denominator, choose how

Convert a Hex Number to Binary Number

Convert hexadecimal numbers to binary - enter Hex values and get the exact binar

Convert a Hex Number to Decimal Number

Convert hexadecimal numbers to decimal - enter Hex values and get the exact deci

Convert a Hex Number to Octal Number

Convert hexadecimal numbers to octal - enter Hex values and get the exact octal

Number to Scientific Notation

Convert standard numbers instantly into normalized a x 10^b scientific notation

Convert an Octal Number to Binary Number

Convert octal numbers to binary - enter Octal values and get the exact binary eq

Convert an Octal Number to Decimal Number

Convert octal numbers to decimal - enter Octal values and get the exact decimal

Convert an Octal Number to Hex Number

Convert octal numbers to hexadecimal - enter Octal values and get the exact hexa

Scientific Notation to Number

Expand scientific notation values back into full standard decimal numbers withou

Count Number Occurrences

Paste any list of numbers and see exactly how often each value occurs - sorted b

Create Fake Numbers - Change Digits in a Number to Unicode Look-alikes

Create fake numbers - replace every digit with a visually similar Unicode look-a

Create Floating Point Number

Construct numbers mathematically by combining a mantissa, numerical base, and ex

Create a Number Circle - Form a Circle of the Digits of a Number

Create a number circle - place the digits of a number evenly around a ring like

Create a Number Digit Tree - Form a Tree from the Digits of a Number

Create a number digit tree - take the digits of a number and merge them into a t

Create a Number Spiral - Form a Spiral from the Digits of a Number

Create a number spiral - take the digits of a number and lay them in a square sp

Create a Number Tree - Form a Tree from the Given Numbers

Create a number tree - combine your numbers into a binary sum tree, pairing neig

Create Number Typos - Generate Various Number Typos

Create number typos - generate the classic mistakes real people make on keypads:

Custom-pad a Number

Pad any number to an exact width with your own symbol - stars, dots, dashes, let

Decrease a Number

Subtract one from the given number - or any amount up to 9,999,999 - with exact

Decrease All Digits in a Number

Subtract one from every digit of a number at once - 200 becomes 1,-1,9-9 digit b

Deficient Number Test

Check whether a number is deficient: greater than the sum of its proper divisors

Deficient Numbers Generator

Generate deficient numbers: n with sigma(n) < 2n: 1, 2, 3, 4, 5, 7, 8, 9, 10, 11

Digit Quotient Calculator

Compute the digit quotient of any positive integer: divide each digit into the n

Dragon Curve Generator

Generate the dragon curve turn sequence - the paperfolding numbers 1, 1, 0, 1, 1

Draw a Magic Square

Generate an N x N magic square matrix where every row, column, and main diagonal

Draw a Number as Color Spectrum

Visualize numbers by mapping their digits (0-9) to a vibrant color spectrum grad

Factorial Calculator

Free factorial calculator. Compute any factorial from 0! to 100000! exactly with

Fibonacci Number Test

Free Fibonacci number checker. Test any number - 144, 4181, 75025 - and learn in

Fibonacci Prime Test

Free Fibonacci prime checker. Test any number - 89, 233, 1597, 28657 - to find o

Fibonacci Prime Numbers Generator

Free Fibonacci primes generator. Compute numbers that are both Fibonacci and pri

Fibonacci Words Generator

Generate the Fibonacci word sequence W0, W1, W2... where each word concatenates

Find the Decimal Expansion of a Number

Find the decimal expansion of a number - enter a numerator and denominator and s

Find Entropy of a Number - Calculate the Complexity or Entropy of a Number

Find the entropy of a number - measure the information density of its digits wit

Find Patterns in Numbers

Paste any list of numbers and instantly see the patterns hiding inside - repeate

GCD and LCM Calculator

Find the gcd and lcm of any two integers with BigInt exactness at any size. Also

GCF and LCM Calculator

Free GCF and LCM calculator. Enter up to five numbers to get the greatest common

Generate a Long Number

Generate a long number - choose exactly how many digits (11 to 1000), the allowe

Generate a Short Number

Generate a short number - choose exactly how many digits (1 to 10), the allowed

Generate Big Numbers

Generate a list of big numbers with the exact size you choose - set a digit rang

Generate Binary Numbers

Generate a sequence of binary numbers - the counting numbers written in base 2 -

Generate Bold Numbers - Write Numbers in a Bold Font

Generate bold numbers - convert every digit to its Unicode mathematical bold cha

Generate Complex Numbers

Generate a list of complex numbers a + bi - pick ranges for the real and imagina

Generate Custom Numbers

Create numbers of arbitrary length with the exact properties you choose - fixed

Generate Decimals

Generate decimal numbers with a chosen precision - pick integer part, decimal pl

Generate Even Numbers

Generate a list of even numbers - 2, 4, 6, 8, ... - from any start in a chosen r

Generate Integer Numbers

Generate a list of integers - whole numbers, positive or negative or both - from

Generate Magic Numbers

Generate mathematically "magic" and visually neat numbers. Instantly calculate l

Generate Natural Numbers

Generate a list of natural numbers - the counting numbers 1,2,3,... - from any s

Generate Non-negative Integers

Generate non-negative integers - 0, 1, 2, 3, ... - from any start in that range,

Generate Numberwang Numbers

Generate a sequence of completely random, unpredictable, and nonsensical numbers

Generate Odd Numbers

Generate a list of odd numbers - 1, 3, 5, 7, ... - from any start in a chosen ra

Generate Pairs of Numbers

Generate pairs of numbers (x, y) - pick the range for each component, how many p

Generate Prime Numbers

Generate a list of prime numbers - 2, 3, 5, 7, 11, ... - from any start up to an

Generate Rational Numbers

Generate rational numbers as exact fractions p/q - pick the numerator and denomi

Generate Real Numbers

Generate a list of random real numbers - pick the range, how many decimals, and

Generate Small Numbers

Generate a list of small numbers - pick a range from 0 to 10,000,000, choose how

Generate Strikethrough Numbers - Write Numbers with a Strikethrough on Them

Generate strikethrough numbers - place a combining long stroke overlay through e

Generate Subscript Numbers - Write Numbers in a Subscript Font

Generate subscript numbers - convert digits into small lowered Unicode subscript

Generate Superscript Numbers - Write Numbers in a Superscript Font

Generate superscript numbers - convert every digit into small raised Unicode sup

Generate the Biggest Number

Print the biggest possible number under your constraints - use every available d

Generate the Smallest Number

Print the smallest possible number under your constraints - arrange given digits

Generate Triples of Numbers

Generate triples of numbers (x, y, z) - pick the range for each component, how m

Generate Tuples of Numbers

Generate n-tuples of numbers - pick how many components, the range for each, how

Generate Unary Numbering

Convert any base-10 integer into its unary numeral system (base-1 tally mark) re

Generate Underline Numbers - Write Numbers with an Underline Below Them

Generate underline numbers - place a combining underline below every digit so nu

Geometric Progression Generator

Free geometric progression generator. Build a GP number sequence from a first te

Gijswijt Numbers Generator

Generate Gijswijt numbers: 1, 1, 2, 1, 1, 2, 2, 2, 3, 1, 1, 2... Everyone term i

Group Number Digits

Group the digits of any number into readable blocks - the usual threes, or group

Increase a Number

Add one to the given number - or any amount up to 9,999,999 - with exact digit-b

Increase All Digits in a Number

Add one to every digit of a number at once - 199 becomes 2,10,10 digit by digit

Interweave Numbers

Interweave two or more numbers digit-by-digit - merge 123 and 456 into 142536, p

Kolakoski Numbers Generator

Generate Kolakoski (Oldenburger-Kolakoski) numbers - the self-describing 1-2 seq

Number on LCD

Draw any number on a seven-segment LCD display. Instant ASCII art for 0-9, with

Lucas Prime Test

Free Lucas prime checker. Test any number - 7, 47, 521, 2207 - and learn whether

Lucas Primes Generator

Scan the Lucas sequence and list every index where the Lucas number is prime. Mi

Find Matrix Determinant

Free matrix determinant calculator. Paste any matrix up to 10×10 and get the exa

Find Matrix Inverse

Free matrix inverse calculator. Paste any square matrix and get its exact invers

Find the Transpose of a Matrix

Free matrix transpose calculator. Paste any matrix and instantly swap its rows a

Mean Median Mode Calculator

Free mean median mode calculator. Paste any list of numbers and instantly get th

Mirror a Number

Create a mirrored copy of any number - append its reverse for a full palindrome

Modulo Calculator

Compute a mod b exactly - the Euclidean remainder of any two integers, positive

Moser-de Bruijn Numbers Generator

Generate Moser-de Bruijn numbers - the sequence 0, 1, 4, 5, 16, 17... of numbers

Negafibonacci Numbers Generator

Free negafibonacci generator. Compute the extended Fibonacci sequence for negati

Negalucas Numbers Generator

Generate negalucas numbers - the Lucas sequence extended to negative indexes. L(

Number Quotient Calculator

Calculate the quotient of two numbers instantly. Divide any two integers or deci

Number to Ordinal Converter

Free number to ordinal converter. Turn any cardinal number into its ordinal form

Number to Roman Numeral Converter

Free Arabic to Roman numeral converter. Convert any number to Roman instantly -

Number to Words Converter

Free number to words converter. Convert any integer or decimal up to 66 digits i

Numbers Table Generator

Generate a numbers table - any rectangle of integers from a start value: choose

Convert Numbers to a Picture

Free number-to-picture generator. Turn any list of numbers into a styled, downlo

Numberwang Number Test - Test if the Given Number is Numberwang

Take the Numberwang number test - find out if a number is Numberwang with the to

Ordinal to Number Converter

Free ordinal to number converter. Turn any ordinal back into a plain number inst

Draw Pascal's Triangle

Free Pascal's triangle generator. Draw any number of rows of Pascal's triangle w

Pentanacci Words Generator

Generate the pentanacci word sequence W0, W1, W2... where each word concatenates

Percent Change Calculator

Free percent change calculator. Enter an old and new value to instantly get the

Percentage Calculator

Free percentage calculator. Compute X% of Y, find what percent one number is of

Perfect Number Test

Check whether a number is perfect: equal to the sum of its proper divisors. Exac

Perfect Numbers Generator

Generate perfect numbers: n with the sum of its proper divisors equal to itself:

Perturb Number Digits - Change the Digits of a Number Slightly

Perturb number digits - rewrite single digits of a number in place by a small st

Perturb Numbers - Change Numbers Slightly

Perturb numbers - nudge any number by a small random amount, up or down, to prod

Prime Factorization Calculator

Free prime factorization calculator. Factorize one or more numbers up to 100 tri

Print Googol

Print the googol - the number 10 to the power 100 - as a full 101-digit integer.

Printf Numbers

Format any number the printf way: set the field width, pad with spaces or zeros,

Random Binary Numbers Generator

Generate random binary numbers of any length and any count. Choose 8-bit, 16-bit

Random Decimal Numbers Generator

Generate random decimal integers or floats in any range, with optional seed for

Random Hex Numbers Generator

Generate random hex strings of any digit length with optional prefixes (#, 0x),

Generate Random Matrix

Free random matrix generator. Create random matrices of any size up to 12×12 wit

Generate Random Numbers

Free random number generator. Create a list of random numbers within any range —

Random Octal Numbers Generator

Generate random octal numbers of any digit length with bias control, reproducibi

Generate Random Prime Numbers

Free random prime number generator. Create a list of random prime numbers from a

Generate Random Vectors

Free random vector generator. Create a random row or column vector with integers

Remove Decimal Point - Remove the Decimal Separator from a Decimal Number

Remove the decimal point from decimal numbers - delete the decimal separator (an

Repeat a Number

Repeat any number as many times as you like - 1 to 1000 copies - joined by nothi

Replace Digits with Letters - Change Numbers into Letters

Replace digits with letters - map 0-9 to A-J by default and turn numbers into re

Reverse a Number

Reverse the order of digits in any number - leading signs stay up front, decimal

Rewrite Numbers (L-System)

Recursively rewrite strings of numbers and characters based on grammatical produ

Roman Numbering Generator

Generate Roman numeral sequences from 1 to 3,999,999 or any range, with modern s

Roman Numeral Converter

Free roman numeral converter. Convert any number from 1 to 3999 to roman numeral

Roman Numeral to Number Converter

Free Roman to Arabic numeral converter. Decode any Roman numeral instantly - IV

Rotate a Number

Cyclically rotate the digits of any number left or right by one or more position

Rounding Calculator

Free rounding calculator. Round any number to a chosen number of decimal places

Rudin-Shapiro Numbers Generator

Generate Rudin-Shapiro numbers: r(n) = +1 or -1 from the parity of adjacent "11"

Running Difference Calculator

Paste any list of numbers and get the running difference at every step, plus min

Running Product Calculator

Paste any list of numbers and get the running product at every step, plus zero-d

Running Sum Calculator

Paste any list of numbers and get the running sum at every step, plus min, max,

Scientific Notation Converter

Free scientific notation converter. Convert any decimal to scientific and engine

Split Number into Digits

Split a number into its individual digits, listed in order with place values - 3

Stanley Numbers Generator

Generate Stanley numbers - the greedy set S(0, 1) built so no three members ever

Symbolic Numbering Generator

Generate alphabetic numbering sequences like spreadsheets: a, b, c, …, z, aa, ab

Tetranacci Words Generator

Generate the tetranacci word sequence W0, W1, W2... where each word concatenates

Thue-Morse Sequence Generator

Generate the Thue-Morse sequence: t(n) = parity of the bit count of n: 0, 1, 1,

Tribonacci Words Generator

Generate the tribonacci word sequence W0, W1, W2... where each word concatenates

Visualize Floating Point (IEEE 754)

Inspect how computer systems store 32-bit floating-point decimal numbers in bina

Zalgo Numbers

Zalgo-ify any number by raining combining marks over its digits - pick mild, med

Zero-pad a Number

Pad any number to an exact width with zeros - on the left, right or both sides -