Number Calculators
Number calculators: percentages, fractions, prime numbers, Pi digits, unit converters (bits, bytes, KB, MB, GB). Free math tools online.
Download digits of Pi
Download digits of Pi from 1,000 to 1 billion
Scientific Calculator with Memory & History
Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89
Prime Numbers List
List of all Prime Numbers - how many Prime numbers are between
Roman Numerals Converter
Roman numerals to decimal number conversion
Numbers to Roman Numerals
Decimal numbers to Roman numerals conversion
Decimal to Binary Converter
Decimal numbers to Binary conversion
Binary to Decimal Converter
Binary numbers to Decimal conversion
Bits to Bytes
Convert Bits to Bytes
Bytes to Bits
Convert Bytes to Bits
Bytes to Kilobytes
Convert Bytes to Kilobytes
Kilobytes to Bytes
Convert Kilobytes to Bytes
Kilobytes to Megabytes (KB to MB)
Convert Kilobytes to Megabytes
Megabytes to Kilobytes (MB to KB)
Convert Megabytes to Kilobytes
Megabytes to Gigabytes (MB to GB)
Convert Megabytes to Gigabytes
Gigabytes to Megabytes (GB to MB)
Convert Gigabytes to Megabytes
Gigabytes to Terabytes
Convert Gigabytes to Terabytes
Terabytes to Gigabytes
Convert Terabytes to Gigabytes
Kilobytes to Gigabytes (KB to GB)
Convert Kilobytes to Gigabytes
Gigabytes to Kilobytes (GB to KB)
Convert Gigabytes to Kilobytes
Bytes to Gigabytes
Convert Bytes to Gigabytes
Bytes to Megabytes
Convert Bytes to Megabytes
Decimal to hex converter
Decimal numbers to Hexadecimal conversion
Hex to Decimal
Hexadecimal numbers to Decimal conversion
Number Facts & Properties
All information about a specific number (spelling, factors, prime check, binary, hexadecimal, QR Code, Barcode and more)
Prime Number Checker
Find out whether a given number is Prime or not
Long Division Calculator
Step-by-step long division with detailed explanation
Long Multiplication Calculator
Column multiplication with partial products, step by step
Addition with Regrouping Calculator
Column addition step by step, with every carry
Subtraction with Regrouping Calculator
Column subtraction step by step, with borrowing across zeros
Multiplication Facts
Any two numbers from 1 to 9, with the working shown
Times Table Chart
Any number from 1 to 100, rows from ×1 to ×12
Multiples of a Number
List the first 10 multiples of any number from 1 to 999
Percentage Calculator: Fraction to Percent
What percentage one number is of another? Convert fraction into a percentage
Percent of Number
Calculate percent of a number
Percent off of a Number
Calculate the discounted price
Percent More than a Number
Calculate percentage increase
Percentage Difference Calculator
Calculate percentage difference between two numbers
Decimal to Percent Converter
Convert Decimals to Percentages
Percent to Decimal Converter
Convert Percents to Decimal
Percent to Fraction Converter
Convert Percents to Fractions
Percent to Probability Converter
Convert Percents to "1 in X" Probability Chance
Random Number Generator
Pick a random whole number between two bounds
Greatest Common Factor
Find the Greatest Common Factor (GCF) of two numbers
Greatest Common Factor of 3 Numbers
Find the Greatest Common Factor (GCF) of three numbers
Least Common Multiple
Find the Least Common Multiple (LCM) of two numbers
Least Common Multiple of 3 Numbers
Find the Least Common Multiple (LCM) of three numbers
Combination Calculator
How many ways to choose k of n items when order doesn’t matter, with the formula worked out
Prime Factorization
Prime Factorization Calculator
Factors of a Number
List all Factors and Factor Pairs of a Number
Square Root Calculator
Calculate the square root of any number
Simplify Square Root Calculator
Write any square root in simplest radical form, step by step
Cube Root Calculator
The cube root of a whole number, a decimal or a fraction: the exact form with triples of prime factors taken out of the root, and the decimal value
Sin, Cos, Tan, Cot of an Angle
Exact value in square roots and the decimal, with reduction to an acute angle on the unit circle
Arcsin, Arccos, Arctan, Arccot
The angle from the value of its sine, cosine, tangent or cotangent: exact in degrees and π, with the check and the unit circle
Logarithm Calculator
The logarithm of a number to any base — ln, log and log₂: exact when the number is a power of the base, with the check and the graph
Rounding Calculator
Round a number to the nearest tenth, hundredth, whole number, ten or hundred
Fraction to Decimal Converter
Convert Fraction to Decimal
Fraction Simplifier Calculator
Simplify Fraction to its Lowest Terms
Fraction to Mixed Number Converter
Convert an Improper Fraction to a Mixed Number
Fraction Comparison Calculator
Compare two fractions and find out which is larger
Adding Fractions Calculator
Add fractions, mixed numbers and whole numbers step by step
Dividing Fractions Calculator
Divide fractions, mixed numbers and whole numbers step by step
Multiplying Fractions Calculator
Multiply fractions, mixed numbers and whole numbers step by step
Subtracting Fractions Calculator
Subtract fractions, mixed numbers and whole numbers step by step
Decimal to Fraction Converter
Convert Decimal to Fraction
Pi Digit Explorer
Discover any digit of pi
Pi Sequence Finder
Discover Your Numbers in Pi - Phone Numbers, Birthdays etc...
First Digits of Pi
Pi up to a specified number of digits