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#Scientific CalculatorEvaluate scientific expressions, exponents, trigonometry, logarithms and more.↗ ΣEquation SolverSolve linear, quadratic and general single-variable equations numerically and see real roots.↗ ΣQuadratic Equation SolverSolve ax² + bx + c = 0, including complex roots.↗ ΣSimultaneous Equation SolverSolve 2×2 and 3×3 systems of linear equations.↗ ΣExpression EvaluatorEvaluate or sample a math expression after substituting variable values.↗ ⌁Function Graphing CalculatorPlot functions y=f(x) and compare up to three graphs interactively.↗ ⌁Derivative CalculatorEstimate derivatives at a point and draw tangent lines.↗ ⌁Definite Integral CalculatorNumerically evaluate definite integrals using composite Simpson integration.↗ ⌁Numerical Limit CalculatorEstimate the left- and right-hand limits of a function.↗ ▦Matrix CalculatorAdd, multiply, transpose, invert and find determinants of matrices.↗ ▥Statistics CalculatorCompute mean, median, mode, variance, deviation, quartiles and more.↗ ▥Correlation & RegressionCalculate Pearson correlation and a least-squares regression line.↗ ▥Binomial ProbabilityCalculate exact binomial probabilities with n trials and success rate p.↗ ⇄Universal Unit ConverterConvert length, area, volume, mass, speed, time, pressure, energy, power, data, angle and temperature.↗ ⌘Number Base ConverterConvert integers between binary, octal, decimal, hexadecimal and bases 2–36.↗ #Fraction CalculatorAdd, subtract, multiply, divide and simplify fractions exactly.↗ #Prime Number CheckerDetermine whether an integer is prime and list its small factors.↗ ◷Date Difference CalculatorCalculate the precise day and week difference between two dates.↗ ◷Age CalculatorCalculate age in years, months and days from a birth date.↗ #Random Number GeneratorGenerate random integers in a chosen interval.↗ △Trigonometry CalculatorCompute sine, cosine, tangent, inverse trig and reciprocal ratios.↗ ▦Vector CalculatorCompute 3D dot products, cross products, magnitudes and angle.↗ ⌘HEX / RGB Color ConverterConvert HEX colors to RGB and HSL with a live color swatch.↗ #Percentage CalculatorFind a percentage of any number.↗ #Percentage Change CalculatorCompare an old and a new value with percentage change.↗ #Percentage Difference CalculatorCompare two values relative to their average.↗ #Ratio CalculatorCalculate a ratio and the share represented by each part.↗ #Proportion CalculatorSolve a/b = c/x for an unknown fourth value.↗ #Weighted Average CalculatorFind an average using weights for three numbers.↗ #Nth Root CalculatorFind the nth root of a nonnegative value.↗ #Power & Exponent CalculatorRaise a base to any power.↗ #Logarithm CalculatorCalculate a logarithm with an arbitrary base.↗ #Factorial CalculatorCalculate factorial of a nonnegative integer.↗ #Permutation CalculatorCount ordered arrangements of r objects chosen from n.↗ #Combination CalculatorCount ways to choose r items from n without ordering.↗ #GCD CalculatorFind the greatest common divisor of two integers.↗ #LCM CalculatorFind the lowest common multiple of two integers.↗ #Modulo CalculatorFind the Euclidean remainder after division.↗ #Arithmetic Mean CalculatorCalculate the mean of four values.↗ #Geometric Mean CalculatorCalculate the geometric mean of positive numbers.↗ ΣLinear Equation CalculatorSolve ax + b = c for x.↗ ΣPolynomial Value CalculatorEvaluate a cubic polynomial ax³+bx²+cx+d.↗ ΣArithmetic Sequence CalculatorCalculate the nth term and sum of an arithmetic progression.↗ ΣGeometric Sequence CalculatorCalculate the nth term and finite sum of a geometric progression.↗ ΣSlope CalculatorFind the slope and rise/run from two points.↗ ΣMidpoint CalculatorCalculate the midpoint of a line segment.↗ Σ2D Distance CalculatorFind the Euclidean distance between two points.↗ ΣExponential Growth CalculatorModel continuous exponential growth or decay.↗ ⬡Rectangle CalculatorFind area, perimeter and diagonal of a rectangle.↗ ⬡Square CalculatorCalculate square area, perimeter and diagonal.↗ ⬡Triangle Area CalculatorFind the area of a triangle from base and height.↗ ⬡Heron’s Formula CalculatorFind triangle area from three side lengths.↗ ⬡Circle CalculatorFind area and circumference from radius.↗ ⬡Ellipse CalculatorCalculate area and approximate perimeter of an ellipse.↗ ⬡Trapezoid Area CalculatorCalculate trapezoid area from parallel sides and height.↗ ⬡Parallelogram Area CalculatorFind area and perimeter of a parallelogram.↗ ⬡Circle Sector CalculatorCalculate sector area and arc length in degrees.↗ ⬡Pythagorean Theorem CalculatorFind the hypotenuse of a right triangle.↗ ⬡Cube CalculatorFind cube volume, surface area and space diagonal.↗ ⬡Rectangular Prism CalculatorCalculate volume, surface area and diagonal of a box.↗ ⬡Sphere CalculatorCompute sphere volume and surface area.↗ ⬡Cylinder CalculatorCalculate cylinder volume and total surface area.↗ ⬡Cone CalculatorCalculate cone volume, slant height and total area.↗ ⬡Square Pyramid CalculatorFind volume and total surface area of a square pyramid.↗ ⬡Torus CalculatorCompute a torus volume and surface area.↗ ⬡Regular Polygon CalculatorFind area and perimeter of a regular polygon.↗ △Degree to Radian ConverterConvert angles from degrees to radians and turns.↗ △Arc Length CalculatorFind circle arc length from radius and angle.↗ △Law of Cosines CalculatorCalculate the third side of a triangle from two sides and their included angle.↗ △Law of Sines CalculatorFind an unknown triangle side given one opposite side-angle pair.↗ ⚛Speed CalculatorFind average speed from distance and elapsed time.↗ ⚛Distance CalculatorCalculate distance traveled at constant speed.↗ ⚛Acceleration CalculatorCalculate acceleration from initial and final velocities.↗ ⚛Displacement CalculatorFind displacement with constant acceleration.↗ ⚛Force CalculatorCalculate force using Newton’s second law.↗ ⚛Work CalculatorFind work from force, displacement and angle.↗ ⚛Kinetic Energy CalculatorFind kinetic energy from mass and velocity.↗ ⚛Gravitational Potential EnergyCalculate gravitational potential energy near Earth’s surface.↗ ⚛Momentum CalculatorCalculate linear momentum from mass and velocity.↗ ⚛Density CalculatorFind density, mass or volume relationship.↗ ⚛Pressure CalculatorCalculate pressure from force and area.↗ ⚛Power CalculatorFind power from work done over elapsed time.↗ ⚛Ohm’s Law CalculatorCalculate current and power from voltage and resistance.↗ ⚛Electrical Power CalculatorFind electrical power and energy use.↗ ⚛Wave Speed CalculatorFind wave velocity from frequency and wavelength.↗ ⚛Frequency & Period CalculatorFind the period for any positive frequency.↗ ⚛Simple Pendulum CalculatorEstimate small-angle pendulum period.↗ ⚛Projectile Motion CalculatorEstimate ideal projectile range and flight time at equal launch/landing heights.↗ ⚛Universal Gravitation CalculatorCalculate gravitational force between two masses.↗ ⚛Heat Energy CalculatorEstimate heat required to change temperature without phase change.↗ ⚛Ideal Gas Law CalculatorCalculate pressure for an ideal gas.↗ ⚛Buoyant Force CalculatorFind buoyant force based on displaced fluid volume.↗ ⚛Torque CalculatorCalculate torque from lever arm and force.↗ ⚛Hooke’s Law CalculatorFind restoring spring force and stored energy.↗ ⚛Centripetal Force CalculatorCalculate inward force in uniform circular motion.↗ ⚛Snell’s Law CalculatorCalculate refracted angle using Snell’s law.↗ ⚛Thin Lens Equation CalculatorFind image distance and magnification for a thin lens.↗ ▥Z-Score CalculatorFind how many standard deviations a value differs from the mean.↗ ▥Standard Error CalculatorEstimate standard error of the sample mean.↗ ▥95% Confidence Interval CalculatorEstimate a 95% normal-approximation confidence interval for a mean.↗ ▥Basic Probability CalculatorCalculate complement and odds of an event.↗ ₹Simple Interest CalculatorCalculate straightforward simple interest and final balance.↗ ₹Compound Interest CalculatorGrow a principal with periodic compounding.↗ ₹Loan EMI CalculatorEstimate equal monthly payments on an amortizing loan.↗ ₹SIP Investment CalculatorProject monthly contributions with a constant assumed return.↗ ₹ROI CalculatorCalculate percentage return on an investment.↗ ₹CAGR CalculatorFind the annualized compound growth rate.↗ ₹Discount CalculatorCalculate final price after a percentage discount.↗ ₹GST / Sales Tax CalculatorCalculate a tax-inclusive price from net price.↗ ₹Profit Margin CalculatorCalculate profit, margin and markup from cost and selling price.↗ ₹Break-Even CalculatorFind how many units must sell to cover fixed and variable costs.↗ ₹Inflation CalculatorEstimate future prices after constant annual inflation.↗ ₹Present Value CalculatorDiscount a future cash flow to its present equivalent.↗ ₹Future Value of AnnuityCalculate ordinary annuity growth from periodic contributions.↗ ₹Rule of 72 CalculatorEstimate doubling time from an annual percentage growth rate.↗ ₹Tip & Bill Split CalculatorCalculate gratuity and split a restaurant bill.↗ ✎Attendance CalculatorCalculate current class attendance and how many more classes you need to reach a target.↗ ✎CGPA to Percentage CalculatorConvert CGPA to a percentage with an adjustable institutional multiplier.↗ ✎Marks Percentage CalculatorCalculate exam percentage from obtained and total marks.↗ ✎Target Exam Score CalculatorFind the score needed on a remaining exam to reach an overall grade.↗ ✎Study Time CalculatorPlan total study hours for sessions over multiple weeks.↗ ⌘Download Time CalculatorEstimate time to download a file at a constant network rate.↗ ⌘Data Storage CalculatorConvert between decimal kilobytes, megabytes and gigabytes.↗ ⌘PPI CalculatorCalculate display pixel density from resolution and diagonal.↗ ⌘Aspect Ratio CalculatorFind width-to-height ratio and resize proportionally.↗ ⌘Electricity Cost CalculatorCalculate electricity expense from appliance wattage and usage.↗ ⌘Series Resistors CalculatorFind equivalent resistance for three series resistors.↗ ⌘Parallel Resistors CalculatorFind equivalent resistance for three parallel resistors.↗ ⌘Frequency to WavelengthConvert electromagnetic wave frequency to wavelength in vacuum.↗ ⌘Compression Ratio CalculatorCalculate file compression ratio and size reduction.↗ ✦Fuel Cost CalculatorEstimate fuel usage and trip fuel cost.↗ ✦BMI CalculatorCompute body mass index from mass and height.↗ ✦Recipe Scaling CalculatorScale an ingredient amount to a new serving count.↗ ✦Running Pace CalculatorCalculate time per kilometer and average running speed.↗ ✦Paint Coverage CalculatorEstimate liters needed based on wall area and coverage.↗ ✦Tile Quantity CalculatorEstimate tiles required for a given area.↗

Built for students, makers & everyday problem-solvers.

Every calculation runs locally in your browser. Use real math and science tools with editable values and straightforward formulas. Results are estimates where noted; this is not a full symbolic CAS or professional engineering certification system. No paid API or account is required.