Mathematics Calculators
Solve percentages, ratios, equations and everyday math problems.
Average Calculator
Calculate the average of multiple numbers.
Calculate Now → 🧮Ratio Calculator
Simplify a ratio between two numbers.
Calculate Now → 🧮Fraction Calculator
Add, subtract, multiply and divide fractions.
Calculate Now → 🧮Discount Calculator
Calculate discount amount and final selling price.
Calculate Now → 🧮Age Calculator
Calculate age in years, months and days.
Calculate Now → 🧮Date Difference Calculator
Calculate the number of days between two dates.
Calculate Now → 🧮Percentage Calculator
Calculate what percentage one number is of another.
Calculate Now → 🧮Percentage Of Calculator
Find a percentage of a given number.
Calculate Now → 🧮Percentage Difference Calculator
Calculate percentage difference relative to the average of two values.
Calculate Now → 🧮GCD and LCM Calculator
Find the greatest common divisor and least common multiple of two whole numbers.
Calculate Now → 🧮Quadratic Equation Calculator
Solve a quadratic equation ax² + bx + c = 0, including complex roots.
Calculate Now → 🧮Circle Calculator
Calculate circle circumference, area and diameter from radius.
Calculate Now → 🧮Triangle Area Calculator
Calculate triangle area using base and perpendicular height.
Calculate Now → 🧮Pythagorean Theorem Calculator
Calculate the hypotenuse from two perpendicular sides or a missing leg.
Calculate Now → 🧮Standard Deviation Calculator
Calculate population and sample standard deviation for a comma-separated data set.
Calculate Now → 🧮Rectangle Perimeter Calculator
Calculate the perimeter of a rectangle from length and width.
Calculate Now → 🧮Circle Circumference Calculator
Calculate a circle circumference and area from its radius.
Calculate Now → 🧮Percentage Point Change Calculator
Find the absolute percentage-point difference between two rates.
Calculate Now → 🧮Weighted Mean Calculator
Calculate the weighted mean of two values.
Calculate Now → 🧮Percentage of Total Calculator
Calculate a part value from a total and percentage.
Calculate Now → 🧮Quadratic Discriminant Calculator
Calculate the discriminant of a quadratic equation and identify its real-root case.
Calculate Now → 🧮Weighted Average
Calculate weighted average from two values and their weights.
Calculate Now → 🧮Population Standard Deviation (Two Values)
Calculate population standard deviation for two equally weighted observations.
Calculate Now → 🧮Percentage Error
Calculate absolute percentage error relative to the accepted value.
Calculate Now → 🧮Relative Change
Calculate relative change between an original and new measurement.
Calculate Now → 🧮Circle Sector Area
Calculate sector area from radius and central angle in degrees.
Calculate Now → 🧮Triangle Area (Heron Formula)
Calculate triangle area from its three side lengths.
Calculate Now → 🧮Population Variance from Standard Deviation
Calculate population variance from a supplied population standard deviation.
Calculate Now → 🧮Coefficient of Variation
Measure relative variability as standard deviation divided by mean.
Calculate Now → 🧮Z-Score Calculator
Calculate how many standard deviations a value is from the mean.
Calculate Now → 🧮Mean Absolute Error
Calculate mean absolute error from total absolute error and sample count.
Calculate Now → 🧮Root Mean Square Error
Calculate RMSE from the sum of squared errors and sample count.
Calculate Now → 🧮Sample Size for a Proportion
Estimate sample size using confidence z-score, expected proportion and margin of error.
Calculate Now → 🧮Bayes Posterior Probability
Calculate posterior probability from prior, sensitivity and false-positive rate.
Calculate Now → 🧮Confidence Interval Half-width
Estimate a confidence interval half-width from z-score and standard error.
Calculate Now → 🧮Covariance from Correlation
Calculate covariance from correlation and the standard deviations of two variables.
Calculate Now → 🧮Percentile Rank Estimator
Estimate percentile rank using values below and equal to a score.
Calculate Now →