Euler totient calculator
Count integers coprime to n from 1 through n using its distinct prime factors.
Open calculatorMaths & numbers
Everyday percentages, sequences and the numbers in between.
Showing 169–192 of 193 tools
Multiplicative order calculator
Find the first positive power of a that gives remainder one modulo m.
Open calculatorRational continued fraction calculator
Expand a rational number into a finite simple continued fraction and inspect every convergent.
Open calculatorRepeating decimal to fraction calculator
Turn a stated repeating decimal block into an exact reduced fraction, including a non-repeating prefix.
Open calculatorInteger base converter
Convert a signed whole number between numeral bases 2 through 36 without floating-point rounding.
Open calculatorFibonacci sequence and term calculator
Find an exact indexed Fibonacci number, inspect early terms and sum through the selected index.
Open calculatorChmod permissions and umask calculator
Calculate octal permission bits, symbolic display and a separate new-object umask example.
Open calculatorWeighted GPA calculator with course credits
Calculate a credit-weighted GPA from your grade points, optional course bonuses and an explicit maximum point value.
Open calculatorUnit price comparison calculator
Compare multipack offers on the same kilogram, litre or item basis, including the percentage saving relative to offer A.
Open calculatorLinear equation solver with balancing steps
Solve ax+b=cx+d with balancing steps, substitution checks and a graph of the two linear expressions.
Open calculatorLinear inequality solver with sign-reversal steps
Solve ax+b < cx+d or its inclusive and greater-than variants, with explicit boundary inclusion and sign reversal.
Open calculatorPolyhedral dice roller for d4 d6 d8 d10 d12 d20 and d100
Roll one to one hundred virtual polyhedral dice with individual results, a total and a visual roll display.
Open toolRoman numeral and integer converter
Convert whole numbers from 1 to 3999 to Roman numerals and validate canonical Roman notation.
Open toolFraction simplifier with exact reduction steps
Reduce an integer numerator and denominator to lowest terms while preserving the value and explaining the decimal form.
Open calculatorFraction to decimal converter with repeating blocks
Convert an exact integer fraction to a terminating decimal or an explicitly marked recurring expansion.
Open calculatorFinite decimal to exact fraction converter
Turn a finite decimal string into a power-of-ten fraction and reduce it without floating-point guessing.
Open calculatorMixed number to improper fraction converter
Combine whole units and a fractional remainder with an explicit sign for the entire value.
Open calculatorSquare root and cube root radical simplifier
Extract perfect square or cube factors from an integer and compare the exact radical with its real decimal approximation.
Open calculatorSimple probability calculator for coins dice and counts
Explore fair coin and six-sided die events or supply equally likely favorable and total outcome counts.
Open calculatorMissing value proportion solver with exact fractions
Solve one unknown position in a/b = c/d and distinguish unique solutions from invalid or undetermined cases.
Open calculatorSales tax percentage calculator for students
Practice finding an entered tax percentage and adding it to a price with the arithmetic shown.
Open calculatorSynthetic division calculator
Divide a polynomial by x minus c using exact rational coefficients and inspect every multiply-add step.
Open calculatorSet operations calculator
Find union intersection directional differences symmetric difference subset relations and schematic Venn-region counts.
Open calculatorPie chart generator
Create a browser-local SVG pie chart with labeled categories percentage and angle calculations a data table and downloadable vector output.
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