Clarity36 FREE TOOLS
Math, made clearer.
Work with percentages, fractions, equations, geometry and descriptive statistics.
Tools in this category
Fraction Calculator
Add, subtract, multiply or divide two fractions and simplify the exact result.
GCD and LCM Calculator
Find the greatest common divisor and least common multiple of two whole numbers.
Circle Area Calculator
Calculate circle area, circumference and diameter from its radius.
Quadratic Formula Calculator
Solve ax² + bx + c = 0 for real or complex roots.
Standard Deviation Calculator
Measure spread in a list of numbers using sample or population standard deviation.
Percentage Calculator
Calculate any percentage of a number, including decimals and negative values.
Percentage Change Calculator
Compare an original and new value to find the relative increase or decrease.
Average Calculator
Calculate the mean, median, sum and range of a list of numbers.
Ratio Simplifier
Reduce a two-part whole-number ratio and see each part’s share of the total.
Proportion Calculator
Solve for x in the positive proportion a/b = c/x.
Weighted Average Calculator
Find an average when observations have different weights.
Percent Error Calculator
Compare a measured value with a nonzero reference using absolute percentage error.
Z-Score Calculator
Express an observation as standard deviations above or below a known mean.
Factorial Calculator
Calculate the exact factorial of a whole number from zero to 500.
Combinations Calculator
Count unordered selections of k distinct items from n items without replacement.
Permutations Calculator
Count ordered arrangements of k distinct items chosen from n without replacement.
Exponent Calculator
Raise a base to a positive, negative or fractional exponent when the result is real and finite.
Logarithm Calculator
Find the logarithm of a positive value in a positive base other than one.
Pythagorean Theorem Calculator
Find a right triangle’s hypotenuse from its two perpendicular legs.
Triangle Area Calculator
Find triangle area from a base and its perpendicular height.
Rectangle Calculator
Find a rectangle’s area, perimeter and diagonal from length and width.
Trapezoid Area Calculator
Calculate area from two parallel bases and their perpendicular separation.
Sphere Calculator
Find sphere volume, surface area and diameter from its radius.
Prime Factorization Calculator
Break a positive whole number into its prime factors and show repeated factors as powers.
Rounding Calculator
Round a decimal to a chosen number of places, with nearest, upward or downward rounding.
Quotient and Remainder Calculator
Divide two nonnegative whole numbers and show an exact integer quotient and remainder.
Arithmetic Sequence Calculator
Find an arithmetic sequence’s nth term, finite sum and first terms from a fixed difference.
Geometric Sequence Calculator
Generate terms and a finite sum for a sequence with a constant multiplier.
Distance Between Two Points Calculator
Calculate straight-line distance, coordinate changes and the midpoint of two points in a plane.
Slope Calculator
Find rise, run, slope and the y-intercept of the line through two coordinate points.
Linear Interpolation Calculator
Estimate a y value between two known points and identify when a result is extrapolation.
Number Base Converter
Convert signed integers between bases 2 through 36 without losing large integer precision.
Scientific Notation Converter
Write a decimal or E-notation number in scientific notation with a chosen display precision.
Aspect Ratio Calculator
Simplify image dimensions into an exact ratio and calculate a matching height for a new width.
Pixel Density Calculator
Calculate pixels per inch, physical screen dimensions and pixel pitch from resolution and diagonal size.
Required Grade Calculator
Find the average score needed on remaining coursework to reach a target overall percentage.
Choosing the right math tool
Use Percentage for a part of a whole, Percentage Change for a comparison over time, and Average to summarize data. Each tool shows the calculation so you can check the result.