100 Calculator Types
Explore working modern calculators and historical teaching tools. Each type has its own controls, an example and calculation explanations. Search these same tools in Dual Calculators.
Scientific Calculator
Trigonometry, inverse trig, powers, roots, logarithms, factorials, combinations and memory.
Open calculator →Math and computingEngineering Calculator
Scientific functions plus engineering notation and physical constants.
Open calculator →Math and computingGraphing Calculator
Plot y=f(x), inspect values, approximate derivatives and definite integrals.
Open calculator →Math and computingStatistics Calculator
Count, sum, mean, median, modes, range, variance and standard deviation.
Open calculator →Math and computingProgrammer Calculator
Binary, octal, decimal and hexadecimal with 32-bit bitwise operations.
Open calculator →Math and computingFraction Calculator
Exact fraction addition, subtraction, multiplication and division with simplified answers.
Open calculator →EverydayStandard Desk Calculator
Calculate with two numbers and see the arithmetic.
Open calculator →EverydayPrinting Tape Calculator
Keep a running tape of completed operations and print it.
Open calculator →EverydayRPN Stack Calculator
Enter numbers before operators; inspect the stack after every token.
Open calculator →EverydayPercentage Desk Calculator
Find a percentage, a percentage increase and a percentage decrease.
Open calculator →EverydayRatio Simplifier Calculator
Reduce an integer ratio using its greatest common divisor.
Open calculator →EverydayProportion Solver Calculator
Solve a/b = c/x for the missing fourth value.
Open calculator →EverydayDecimal Arithmetic Calculator
Calculate with two numbers and see the arithmetic.
Open calculator →EverydayMixed Number Calculator
Convert a whole part and a fraction into an exact improper fraction.
Open calculator →EverydayLong Division Calculator
Divide whole numbers with quotient, remainder and place-value steps.
Open calculator →EverydayRounding and Precision Calculator
Round to decimal places or significant figures.
Open calculator →Finance and businessFinancial TVM Calculator
Solve future value or periodic payment with explicit cash-flow signs.
Open calculator →Finance and businessSimple Interest Calculator
Calculate interest and total with no compounding.
Open calculator →Finance and businessCompound Interest Calculator
Calculate periodic compounding without additional deposits.
Open calculator →Finance and businessLoan Amortization Calculator
Calculate fixed monthly payments and a month-by-month principal/interest schedule.
Open calculator →Finance and businessCash Flow NPV Calculator
Discount evenly spaced signed cash flows to the initial date.
Open calculator →Finance and businessDiscount and Sale Price Calculator
Calculate a discount amount and the reduced price.
Open calculator →Finance and businessMarkup Pricing Calculator
Price from a markup percentage on cost.
Open calculator →Finance and businessMargin Pricing Calculator
Price from a desired gross margin on selling price.
Open calculator →Finance and businessBreak-even Units Calculator
Find the sales volume needed to cover fixed costs.
Open calculator →Finance and businessStraight-line Depreciation Calculator
Spread depreciable cost evenly over useful life.
Open calculator →Finance and businessProfit and Profit Margin Calculator
Compare revenue and total costs.
Open calculator →Finance and businessCurrency with Your Rate Calculator
Convert money using an exchange rate you enter.
Open calculator →Algebra and number theoryLinear Equation Calculator
Solve ax + b = c.
Open calculator →Algebra and number theoryQuadratic Equation Calculator
Solve ax² + bx + c = 0, including complex roots.
Open calculator →Algebra and number theoryTwo Simultaneous Equations Calculator
Solve ax + by = c and dx + ey = f.
Open calculator →Algebra and number theoryPolynomial Evaluation Calculator
Evaluate a polynomial using Horner’s method.
Open calculator →Algebra and number theoryPower and Nth Root Calculator
Calculate a power and a real nth root.
Open calculator →Algebra and number theoryLogarithm by Base Calculator
Find log base b of x.
Open calculator →Algebra and number theoryComplex Number Calculator
Add, subtract, multiply or divide two rectangular complex numbers.
Open calculator →Algebra and number theoryMatrix Operations Calculator
Operate on matrices up to 4×4; determinant and inverse use square matrices.
Open calculator →Algebra and number theoryVector Operations Calculator
Find 3D dot product, cross product and vector magnitudes.
Open calculator →Algebra and number theoryGCD and LCM Calculator
Explore whole-number divisibility with working steps.
Open calculator →Algebra and number theoryPrime Test Calculator
Explore whole-number divisibility with working steps.
Open calculator →Algebra and number theoryInteger Factors Calculator
Explore whole-number divisibility with working steps.
Open calculator →Algebra and number theoryArithmetic and Geometric Sequences Calculator
Find the nth term and sum of the first n terms.
Open calculator →Algebra and number theoryFunction Table Calculator
Evaluate a supported scientific expression at evenly spaced x values.
Open calculator →Geometry and trigonometryRectangle Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryTriangle Area Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryCircle Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryTrapezoid Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryParallelogram Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryEllipse Area Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryCube Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryRectangular Solid Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryCylinder Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryCone Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometrySphere Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryPythagorean Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryRegular Polygon Calculator
Calculate shape measurements with formula substitution.
Open calculator →Geometry and trigonometryTriangle from Three Sides Calculator
Use three side lengths to find area and angles.
Open calculator →Statistics and probabilityWeighted Mean Calculator
Calculate an average with nonnegative weights.
Open calculator →Statistics and probabilityLinear Regression Calculator
Fit y = intercept + slope × x and calculate correlation.
Open calculator →Statistics and probabilityEvent Probability Calculator
Compute favorable outcomes divided by equally likely total outcomes.
Open calculator →Statistics and probabilityBinomial Distribution Calculator
Find the probability of exactly k successes in n independent trials.
Open calculator →Statistics and probabilityPoisson Distribution Calculator
Find the probability of exactly k events at a fixed mean event count.
Open calculator →Statistics and probabilityNormal Distribution Calculator
Calculate density and approximate cumulative probability at x.
Open calculator →Statistics and probabilityCombinations Calculator
Count selections without replacement; combinations ignore order, permutations keep order.
Open calculator →Statistics and probabilityPermutations Calculator
Count selections without replacement; combinations ignore order, permutations keep order.
Open calculator →Statistics and probabilityZ Score Calculator
Express a value in standard-deviation units.
Open calculator →Statistics and probabilityMean Confidence Interval Calculator
Calculate a normal-theory interval with known population standard deviation.
Open calculator →Science and engineeringSpeed Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringAcceleration Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringNewton’s Force Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringKinetic Energy Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringWork and Power Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringOhm’s Law Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringElectrical Power Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringDensity Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringPressure Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringIdeal Gas Pressure Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringWave Frequency Calculator
Calculate from the stated physical model using SI units.
Open calculator →Science and engineeringSeries and Parallel Resistors Calculator
Calculate the equivalent resistance of positive resistors.
Open calculator →Historical toolsJapanese Soroban Abacus Calculator
Move one upper bead worth five and four lower beads worth one on each decimal rod.
Open calculator →Historical toolsChinese Suanpan Abacus Calculator
Move two upper beads worth five each and five lower beads worth one each.
Open calculator →Historical toolsNapier’s Rods Calculator
Read digit multiples and diagonal carries to multiply by a single digit.
Open calculator →Historical toolsSlide Rule Calculator
Explore multiplication through aligned logarithmic scales.
Open calculator →Historical toolsPascaline Carry Model Calculator
Add whole numbers by decimal wheel carries.
Open calculator →Historical toolsStepped Reckoner Method Calculator
Multiply by repeated additions and decimal carriage shifts.
Open calculator →Historical toolsEgyptian Doubling Calculator
Multiply through doubling and selection of powers of two.
Open calculator →Historical toolsLattice Multiplication Calculator
Multiply digit pairs in a grid and sum by place value.
Open calculator →Historical toolsRoman Numerals Calculator
Convert decimal whole numbers into conventional subtractive Roman notation.
Open calculator →Historical toolsBabylonian Base-60 Calculator
Show a whole number in sexagesimal place values using modern digit notation.
Open calculator →Historical toolsMayan Base-20 Calculator
Show ordinary base-20 place values as bars and dots.
Open calculator →Historical toolsEgyptian Decimal Symbols Calculator
Show additive decimal groups with named Egyptian numeral symbols.
Open calculator →Historical toolsGreek Alphabetic Numerals Calculator
Convert 1–999 using alphabetic Greek numeral conventions.
Open calculator →Historical toolsBinary Place Values Calculator
Explore base-2 representation and powers of two.
Open calculator →Historical toolsLogarithm Table Method Calculator
Multiply with common logarithms and an antilogarithm.
Open calculator →Historical toolsDecimal Counting Board Calculator
Change counters in decimal columns and see regrouping.
Open calculator →Units and practical toolsUnit Conversion Calculator
Convert length, mass, area or volume within the selected dimension.
Open calculator →Units and practical toolsTemperature Calculator
Convert Celsius, Fahrenheit and Kelvin.
Open calculator →Units and practical toolsTime Duration Arithmetic Calculator
Add or subtract nonnegative durations in hours, minutes and seconds.
Open calculator →Units and practical toolsFeet–Inches–Fractions Calculator
Add or subtract lengths entered in feet and fractional inches.
Open calculator →Units and practical toolsDegrees–Minutes–Seconds Calculator
Convert signed decimal degrees to degrees, minutes and seconds.
Open calculator →Units and practical toolsCartesian and Polar Coordinates Calculator
Convert x,y to radius and angle.
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