Fast, accurate calculators for derivatives, integrals, algebra, statistics, and more. No signup, no ads, just maths.
Calculate derivatives of any function step by step. Supports higher-order derivatives, partial derivatives, and common functions. Free online tool.
Calculate indefinite integrals (antiderivatives) of functions. Symbolic integration with step-by-step display. Free online integral calculator.
Calculate definite integrals with upper and lower bounds. Numerical integration using Simpson's rule. Free online definite integral calculator.
Calculate double integrals over rectangular regions. Numerical evaluation of two-variable integrals. Free online double integral calculator.
Calculate partial derivatives of multivariable functions. Symbolic differentiation with respect to chosen variable. Free online tool.
Calculate limits of functions as a variable approaches a value. Supports left and right limits. Free online limit calculator.
Evaluate mathematical series and calculate partial sums. Arithmetic, geometric, and custom series. Free online series calculator.
Calculate sigma notation sums. Evaluate expressions over a range using summation notation. Free online summation calculator.
Calculate Taylor and Maclaurin series expansions. Find polynomial approximations of functions. Free online Taylor series calculator.
Find dy/dx from implicit equations step by step. Handles circles, ellipses, and polynomial curves. Compute slopes at specific points. Free online calculator.
Calculate slope from two points, find slope-intercept and point-slope form. Free online slope calculator with graphing.
Solve quadratic equations using the quadratic formula. Find roots, discriminant, and vertex. Free online quadratic formula calculator.
Solve algebraic equations for x. Handles linear, quadratic, polynomial, and simple equations. Free online equation solver.
Find the inverse of functions and matrices. Calculate inverse matrices and inverse functions. Free online inverse calculator.
Solve systems of linear equations with 2 or 3 unknowns. Step-by-step solutions using substitution, elimination, and Cramer's rule. Free online tool.
Calculate with complex numbers: arithmetic, modulus, conjugate, polar form, powers, and Euler form. Free online complex number calculator.
Graph quadratic functions instantly. Plot parabolas, find vertex, axis of symmetry, and roots. Free online quadratic graphing tool.
Free online algebra calculators: quadratic formula, solve for x, systems of equations, factoring, graphing, and slope. All algebra tools in one place.
Complete the square step by step. Convert quadratics to vertex form, find the vertex, axis of symmetry, and solve equations. Free online calculator.
Perform synthetic division step by step. Find quotient, remainder, and verify with multiplication. Includes Remainder Theorem. Free online calculator.
Calculate percentages instantly. Find what percent of a number, percentage change, and percentage difference. Free, fast, no signup.
Add, subtract, multiply, and divide fractions. Simplify fractions and convert to mixed numbers. Free online fraction calculator.
Simplify ratios and find missing values in proportions. Free online ratio calculator with step-by-step results.
Calculate powers and exponents instantly. Compute base raised to any power including negative and fractional exponents. Free online tool.
Calculate logarithms with any base. Find natural log (ln), log base 10, and custom base logarithms. Free online log calculator.
Find all factors, prime factorisation, factor pairs, GCD, and LCM. Free online factor calculator with instant results.
Free online scientific calculator with trigonometry, logarithms, exponents, and more. Works like a physical calculator. No download needed.
Free online graphing calculator. Plot mathematical functions, see graphs, and explore equations visually. No download needed.
Convert between units of length, weight, temperature, volume, area, and speed. Free online unit converter with instant results.
Calculate the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) of two or more numbers. Free online GCD and LCM calculator with steps.
Calculate percentage increase, decrease, difference, and error. Free online percentage change calculator with step-by-step working.
Generate random numbers, dice rolls, coin flips, and pick from custom lists. Free online random number generator with multiple modes.
Calculate semester and cumulative GPA. Find the grade you need to reach your target GPA. Free online GPA calculator for students.
Calculate days between dates, add or subtract days, count business days, and find the day of the week. Free online date calculator.
Add and subtract time, find time differences, and convert between hours, minutes, and decimal hours. Free online time calculator.
Convert between Roman numerals and Arabic numbers. View conversion charts and convert dates to Roman numerals. Free online converter.
Calculate your exact age in years, months, and days from your date of birth. Find days between any two dates. Free online age calculator.
Free online factorial calculator. Compute n!, double factorial n!!, factorial tables 0-20, and Gamma function for non-integers. Step-by-step solutions with BigInt precision.
Free online modulo calculator. Find remainders, perform modular addition, subtraction, and exponentiation. Includes clock arithmetic visualisation with step-by-step solutions.
Free online significant figures calculator. Count sig figs, round numbers, apply sig fig rules to arithmetic, and convert to scientific notation. Highlights significant digits.
Perform linear, bilinear, and Lagrange polynomial interpolation. Enter data points and find interpolated values with step-by-step working. Free online calculator.
Calculate probability of events, complements, unions, and intersections. Free online probability calculator for statistics.
Calculate standard deviation, variance, mean, and more for any dataset. Supports population and sample statistics. Free online tool.
Calculate z-scores, find values from z-scores, and determine probabilities. Free online z-score calculator with bell curve visualisation.
Calculate binomial probabilities, cumulative distributions, and expected values. Free online binomial distribution calculator with bar chart.
Calculate probabilities for normal distributions. Find areas under the bell curve, percentiles, and inverse values. Free online tool.
Calculate Pearson correlation coefficient, R-squared, and regression line. Free online correlation calculator with scatter plot.
Calculate permutations and combinations. Find nPr, nCr, factorials, and arrangements. Free online permutation and combination calculator.
Calculate mean, median, mode, and range for any dataset. Free online central tendency calculator with step-by-step solutions.
Calculate the coefficient of variation (CV) from a dataset or from mean and standard deviation. Compare relative variability between datasets. Free online tool.
Calculate the geometric mean of a dataset or growth rates. Compare geometric and arithmetic means. Free online geometric mean calculator with steps.
Calculate the harmonic mean of a dataset or weighted harmonic mean. Compare arithmetic, geometric, and harmonic means. Free online calculator with steps.
Calculate Poisson probabilities instantly. Find P(X=k), cumulative probabilities, mean and variance. Free online Poisson distribution calculator with bar chart.
Calculate expected value from probability tables, frequency tables, or game outcomes. Free online expected value calculator with variance and standard deviation.
Detect outliers using IQR, Z-score, or Modified Z-score methods. Free online outlier calculator with box plot visualisation and step-by-step analysis.
Free online chi-square calculator. Perform goodness of fit tests, tests of independence, find p-values from chi-square statistics, and look up critical values.
Free online t-test calculator. Perform one-sample, two-sample independent, and paired t-tests. Get p-values, test statistics, and step-by-step solutions.
Free online confidence interval calculator. Compute CIs for means using z or t distributions, confidence intervals for proportions, and required sample sizes.
Calculate p-values from z-scores, t-statistics, and chi-square statistics. Interpret statistical significance with step-by-step explanations. Free online tool.
Calculate the required sample size for surveys and experiments. Determine sample size for proportions and means, or find the margin of error. Free online tool.
Calculate percentile ranks, values at percentiles, quartiles Q1/Q2/Q3, and deciles with box plot visualisation. Free online percentile calculator.
Calculate conditional probabilities using Bayes theorem. Visualise with tree diagrams. Includes medical test, spam filter, and other real-world examples. Free online.
Calculate triangle sides, angles, area, and perimeter. Supports SSS, SAS, ASA, AAS configurations. Free online triangle calculator.
Interactive unit circle with exact trigonometric values. Find sin, cos, tan for any angle, reference angles, and degree-radian conversions. Free, instant results.
Calculate eigenvalues and eigenvectors of matrices. Supports 2x2 and 3x3 matrices. Free online eigenvalue calculator.
Perform matrix operations: addition, subtraction, multiplication, determinant, transpose, and RREF. Free online matrix calculator with step-by-step solutions.
Calculate the cross product of two 3D vectors. Find magnitude, unit vector direction, parallel check, and dot product. Free online vector calculator.
Calculate the determinant of 2x2, 3x3, and 4x4 matrices. Step-by-step cofactor expansion with detailed workings. Free online matrix determinant calculator.
Find the null space basis, nullity, RREF with free variables, and column space of a matrix. Free online null space calculator with step-by-step Gaussian elimination.
Calculate monthly mortgage payments, total interest, and amortisation schedules. Compare refinance options and find how much you can afford.
Calculate compound interest with contributions. Compare compounding frequencies, find time to target, and see year-by-year growth tables.
Calculate profit margin, markup, and selling price. Convert between margin and markup percentages. Compare gross and net margins. Free online margin calculator.
Calculate sales tax, find pre-tax prices, and compare tax rates. Includes US state tax rate reference table. Free online sales tax calculator.
Calculate sale prices, find discount percentages, and work out stacked discounts. See how much you save. Free online discount calculator.
Calculate purchasing power, inflation rates between years, and future value adjusted for inflation. US CPI data from 1913 to 2025. Free online inflation calculator.
Calculate investment growth with monthly contributions. Find future value, required contributions, time to reach goals, and compare scenarios. Free online tool.
Calculate how much you need to retire, when you can retire, and retirement income. Uses the 4% withdrawal rule and 25x expenses rule. Free online tool.
Calculate monthly loan payments, total interest, and borrowing capacity. Compare loan scenarios side by side. Free online loan calculator.
Calculate take-home pay from gross salary or hourly wage. Estimate taxes, convert hourly to annual, and calculate overtime. Free online tool.
Generate loan amortisation schedules, see extra payment impact, and find payoff dates. Free online amortisation calculator with tables.
Convert between annual, monthly, biweekly, and hourly pay. Estimate take-home salary after taxes. Free online salary calculator.
Calculate federal income tax, effective tax rate, and find your tax bracket. Compare marginal vs effective rates. Free online tax calculator.
Calculate simple interest, total amount, find the interest rate, or find time to reach a target. Free online simple interest calculator.
Calculate tips, split bills, and work out tax on restaurant bills. Customise tip percentage and number of people. Free online tip calculator.
Calculate your Body Mass Index (BMI) with metric or imperial units. See WHO category classification and healthy weight range for your height.
Calculate daily calorie needs for weight loss, gain, or maintenance. Uses the Mifflin-St Jeor equation. Free online calorie calculator.
Calculate your Total Daily Energy Expenditure using Mifflin-St Jeor and Harris-Benedict formulas. Free online TDEE calculator.
Calculate your pregnancy due date from your last menstrual period or conception date. Track trimester progress. Free online due date calculator.
Calculate your Basal Metabolic Rate using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas. Free online BMR calculator.
Calculate your ideal macronutrient split for protein, carbs, and fat. Set macros by goal, custom ratio, or per meal. Free online macro calculator.
Math Calculator provides free, fast online calculators for students, teachers, engineers, and anyone who needs to solve maths problems quickly. Our tools cover calculus (derivatives, integrals, limits, series), algebra (quadratic formula, equation solving), statistics (standard deviation, probability), trigonometry, and general arithmetic.
Every calculator is designed to give you accurate results instantly, with clear explanations of the formulas and methods used. No sign-up required, no paywalls, and no unnecessary complexity.