44 tools
Math Calculators
Percentage, age, date, and everyday math utilities for quick classroom, homework, and planning tasks.
Percentage Calculator
Find what percent one number is of another, calculate X percent of Y, or measure percent change between two values.
Open tool →Age Calculator
Calculate exact age in years, months, and days from a birth date using your local calendar date.
Open tool →Day Counter
Count inclusive days, weeks, and remaining days between two calendar dates for planning and deadlines.
Open tool →Fraction Calculator
Add, subtract, multiply, and divide fractions and see the simplified result plus decimal form.
Open tool →GPA Calculator
Calculate weighted GPA from course credits and grade points on a 4.0 scale.
Open tool →Standard Deviation Calculator
Calculate sample or population standard deviation, mean, and count from a list of numbers.
Open tool →Scientific Notation Calculator
Convert numbers between decimal form and scientific notation in either direction.
Open tool →Triangle Calculator
Calculate triangle area from base and height or from three side lengths using Herons formula.
Open tool →Volume Calculator
Calculate volume for cubes, rectangular prisms, cylinders, spheres, and cones from their dimensions.
Open tool →Slope Calculator
Find the slope, y-intercept, and line equation from two coordinate points.
Open tool →Quadratic Formula Calculator
Solve ax² + bx + c = 0 using the quadratic formula and see the discriminant and roots.
Open tool →Pythagorean Theorem Calculator
Find the hypotenuse or a missing leg of a right triangle using a² + b² = c².
Open tool →Area Calculator
Calculate area for rectangles, circles, triangles, and trapezoids from their dimensions.
Open tool →Mean, Median, Mode Calculator
Calculate mean, median, and mode from a list of numbers for homework, stats, and data summaries.
Open tool →Log Calculator
Calculate logarithms for any positive base and value, including common base-10 and base-2 logs.
Open tool →Percent Error Calculator
Find percent error between an observed measurement and the accepted or true value.
Open tool →Circle Calculator
Calculate circle area, circumference, and diameter from the radius.
Open tool →Exponent Calculator
Raise a base number to any exponent and see the result instantly.
Open tool →Ratio Calculator
Simplify a ratio to lowest terms and see the decimal equivalent.
Open tool →GCF Calculator
Find the greatest common factor of two or more positive whole numbers.
Open tool →LCM Calculator
Find the least common multiple of two or more positive whole numbers.
Open tool →Permutation & Combination Calculator
Calculate permutations nPr and combinations nCr for choosing r items from n total items.
Open tool →Probability Calculator
Calculate independent joint probability P(A and B) or mutually exclusive union probability P(A or B).
Open tool →Binary Calculator
Convert decimal numbers to binary or decode binary strings back to decimal.
Open tool →Hex Calculator
Convert decimal numbers to hexadecimal or decode hex strings back to decimal.
Open tool →Prime Factorization Calculator
Find the prime factors of a positive integer greater than one.
Open tool →Rounding Calculator
Round, floor, or ceiling a number to a chosen number of decimal places.
Open tool →Distance Calculator
Calculate the straight-line distance between two points on a 2D coordinate plane.
Open tool →Surface Area Calculator
Calculate surface area for cubes, spheres, and cylinders from their dimensions.
Open tool →Z-Score Calculator
Calculate the z-score of a value given the mean and standard deviation of a data set.
Open tool →Half-Life Calculator
Calculate remaining quantity after elapsed half-life periods using exponential decay.
Open tool →Factor Calculator
Find all positive factors of a whole number, listed in ascending order.
Open tool →Confidence Interval Calculator
Calculate confidence interval bounds and margin of error from sample mean, standard deviation, and sample size.
Open tool →Right Triangle Calculator
Solve a right triangle by finding the hypotenuse from two legs or a missing leg from the hypotenuse and one leg.
Open tool →Root Calculator
Calculate nth roots of any number, including square roots, cube roots, and higher-order roots.
Open tool →Sample Size Calculator
Estimate the required survey sample size from confidence level, margin of error, and estimated proportion.
Open tool →Number Sequence Calculator
Generate arithmetic sequence terms and find the next term from the first term, common difference, and term count.
Open tool →Long Division Calculator
Calculate integer quotient and remainder from a dividend and divisor for long division problems.
Open tool →P-Value Calculator
Calculate one-tailed or two-tailed p-value from a z-score for hypothesis testing.
Open tool →Big Number Calculator
Add very large whole numbers that exceed normal calculator precision using string-based arithmetic.
Open tool →Repayment Calculator
Calculate loan repayment months, total interest, and total paid from principal, rate, and monthly payment.
Open tool →Matrix Calculator — 2×2
Add or multiply 2×2 matrices and see the resulting matrix values instantly.
Open tool →Basic Calculator
Add, subtract, multiply, or divide two numbers with instant results for everyday arithmetic.
Open tool →Scientific Calculator
Evaluate math expressions with powers, square roots, and standard operators in one step.
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