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Home/Calculators

Calculators

Browse calculator categories — math with step-by-step solutions, plus loans, interest, and everyday money tools.

57 calculators

All (57)

57 matches

Popular calculators

  • Percentage CalculatorSolve percentage proportion, common phrases, difference, and percent change.→
  • Loan CalculatorAmortized payments, deferred lump-sum loans, and zero-coupon bond proceeds — with compounding separate from pay-back frequency.→
  • Mortgage CalculatorHome price, down payment, taxes, insurance, extra principal, and a full amortization schedule.→
  • Compound Interest CalculatorConvert a quoted interest rate between compounding frequencies — annual APY, monthly APR, daily, continuous, and more.→
  • Savings CalculatorProject savings growth with an initial deposit, annual and monthly contributions, compounding, and tax on interest.→
  • ROI CalculatorReturn on investment with investment gain, ROI percent, annualized ROI, and holding period.→

Math

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  • Percentage CalculatorSolve percentage proportion, common phrases, difference, and percent change.
  • Percent Error CalculatorCompare an observed value to a true value and get absolute, relative, and percent error.
  • Ratio CalculatorSolve A:B = C:D, simplify ratios, and enlarge or shrink by a factor.
  • Average CalculatorArithmetic and weighted mean with a visual sum÷count layout and step-by-step work.
  • Rounding CalculatorRound numbers by place precision, fraction units, or significant figures — with multiple rounding modes.
  • Exponent CalculatorSolve base^exponent = result for any missing value — with optional base e and exponent laws.
  • Root CalculatorSquare, cube, and general nth-root calculator with principal root, ± for even roots, and verification.
  • Fraction CalculatorAdd, subtract, multiply, divide, simplify, and convert fractions and mixed numbers.
  • Long Division CalculatorVisual long division with quotient, remainder, decimal expansion, and step-by-step work.
  • Basic CalculatorFour-function calculator with keypad, parentheses, and step-by-step PEMDAS evaluation.
  • Least Common Multiple CalculatorFind the LCM of two or more integers with GCD, prime-factorization, and multiples steps.
  • Greatest Common Factor CalculatorFind the GCF (GCD) of two or more integers with Euclidean and prime-factor steps.
  • Factor CalculatorList all positive factors, factor pairs, and the prime factorization of a whole number.
  • Common Factor CalculatorList every positive factor shared by two or more integers, with per-number factor lists and the GCF.
  • Prime Factorization CalculatorPrime factors with trial division, factor tree, and compact or expanded form.
  • Scientific Notation CalculatorConvert to scientific, E, and engineering notation — plus arithmetic with precision control.
  • Quadratic Formula CalculatorSolve ax² + bx + c = 0 with fractions allowed; roots, discriminant, axis, vertex, and derivation steps.
  • Log CalculatorSolve log_b(x) = y for base, argument, or value — type e for natural logs; rules and change-of-base included.
  • Half-Life CalculatorSolve N₀, N_t, t, or t½ for exponential decay — plus convert t½, mean lifetime τ, and decay constant λ.
  • Matrix CalculatorUp to 4×4 matrices: det, inverse, transpose, power, scalar, A±B, and AB with fill tools and steps.
  • Big Number CalculatorVery large numbers: integers, decimals, and E-notation with + − × ÷ ^ √ x² x! mod gcd lcm and precision.
  • Scientific CalculatorFull scientific keypad: trig, inverse, logs, roots, powers, %, n!, Ans, and memory — Deg/Rad modes.
  • Binary CalculatorBinary +, −, ×, ÷ and convert binary ↔ decimal with place-value tables and column carries.
  • Hex CalculatorHex +, −, ×, ÷ and convert hex ↔ decimal with place-value tables and column carries.
  • Random Number GeneratorSimple large integers or comprehensive multi-sample draws — integers or decimals, duplicates optional, sort asc/desc.
  • Mean, Median, Mode, Range CalculatorArithmetic mean, median, mode(s), and range for comma-separated data — with ordered list, frequency table, and worked steps.
  • Statistics CalculatorArithmetic and geometric means, σ and s, variance, quartiles, IQR, and Σx / Σx² from a comma-separated list.
  • Standard Deviation CalculatorPopulation σ and sample s with variance, mean, sum, standard error, and margin of error for the mean.
  • Number Sequence CalculatorArithmetic, geometric, and Fibonacci sequences: nth term, partial sum, and term list with clear formulas.
  • Probability CalculatorIndependent two-event probabilities, solver, series of trials, normal range area, simple favorable/total, and Bayes.
  • Permutation and Combination CalculatornPr and nCr without replacement, plus with-replacement n^r and multichoose, with factorials and steps.
  • Sample Size CalculatorMinimum survey sample size, margin of error from n, or mean-study sizing — with optional finite population correction.
  • Z-score CalculatorCompute z from x, μ, σ; convert between z and normal probabilities like a z-table; or area between two z-scores.
  • Confidence Interval Calculatorz confidence interval for a mean (x̄ ± z·σ/√n) or Wald interval for a proportion, with SE, margin, and multiple interval forms.
  • P-value CalculatorConvert between z and normal p-values (left, right, center, between, two-tail), or one-/two-tailed p from z with optional α.
  • Area CalculatorArea of square, rectangle, triangle (Heron), trapezoid, circle, sector, ellipse, and parallelogram — with length units and square-unit conversions.
  • Circle CalculatorFrom any one of radius, diameter, circumference, or area, compute the other three measures of a circle.
  • Triangle CalculatorSolve any triangle from three of sides a, b, c and angles A, B, C. Get area, medians, inradius, circumradius, and a scale diagram.
  • Right Triangle CalculatorEnter any two of a, b, c, α, β, altitude h, area, or perimeter to solve a right triangle completely.
  • Pythagorean Theorem CalculatorSolve a² + b² = c² given any two sides of a right triangle. See squares on each side and stepped solutions.
  • Volume CalculatorVolume of sphere, cone, cube, cylinder, tank, capsule, cap, frustum, ellipsoid, pyramid, and tube with unit conversions.
  • Surface Area CalculatorSurface area of sphere, cone, cube, cylinder, tank, capsule, cap, frustum, ellipsoid, and pyramid with unit conversions.
  • Distance Calculator2D/3D coordinate distance and midpoint; lat/lon great-circle with Lambert and haversine; DMS or decimal; OpenStreetMap pick and place search.
  • Slope CalculatorSlope, incline angle, distance, rise/run, and line equation from two points or point + slope.

Financial

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  • Loan CalculatorAmortized payments, deferred lump-sum loans, and zero-coupon bond proceeds — with compounding separate from pay-back frequency.
  • Amortization CalculatorMonthly payment, extra principal, and a full monthly plus annual amortization schedule.
  • Mortgage CalculatorHome price, down payment, taxes, insurance, extra principal, and a full amortization schedule.
  • Auto Loan CalculatorVehicle price or monthly budget, down payment, trade-in, tax, fees, and a full amortization schedule.
  • Interest Rate CalculatorRecover the fixed annual rate of a loan from the amount, term, and monthly payment.
  • Compound Interest CalculatorConvert a quoted interest rate between compounding frequencies — annual APY, monthly APR, daily, continuous, and more.
  • Simple Interest CalculatorInterest on the original principal only: solve for end balance, principal, term, or rate.
  • Present Value CalculatorDiscount a future lump sum, or a series of deposits, back to what it is worth today.
  • Future Value CalculatorGrow a starting amount plus periodic deposits with compound interest per period.
  • Savings CalculatorProject savings growth with an initial deposit, annual and monthly contributions, compounding, and tax on interest.
  • ROI CalculatorReturn on investment with investment gain, ROI percent, annualized ROI, and holding period.
  • Discount CalculatorSolve any two of original price, discount, sale price, and amount saved — percent off or fixed amount off.
  • Sales Tax CalculatorSolve any two of before-tax price, sales tax rate, and after-tax price — tax amount included.

Math calculators

  • General
  • Statistics
  • Geometry
  • Percentage Calculator
  • Average Calculator
  • Fraction Calculator
  • Area Calculator
  • Triangle Calculator
  • Distance Calculator
All math tools→

Popular financial

  • Loans & mortgages
  • Interest & savings
  • Everyday money
  • Loan Calculator
  • Mortgage Calculator
  • Compound Interest Calculator
  • Savings Calculator
  • ROI Calculator
  • Sales Tax Calculator
All financial calculators→

Popular

  • Unit Converter (Universal)Pick any unit group and convert between its units.
  • LengthMeters, feet, inches, kilometers, miles, and more.
  • TemperatureTemperature conversion with precise factors.
  • Weight & MassKilograms, pounds, ounces, tons, and stone.
  • BinaryBinary conversion with precise factors.
  • Time ZoneConvert local date/time between IANA time zones.
Browse all converters→

Formula Library

Searchable knowledge base of formulas — each with its own page, linked tools, and related formulas.

Formula Library→