Math and Statistics

  • Slope from Rise over Run Calculator
    Calculate the slope (m) of a line from rise over run. Enter vertical rise and horizontal run to get slope, percent grade, and angle of incline.
  • Y-Intercept Calculator
    Find the y-intercept of a line from its equation. Works for slope-intercept (y = mx + b) and standard form (Ax + By = C). Free and instant.
  • Percent Off Calculator
    Find the discount percentage from an original price and a sale price. Instantly see the percent off and the amount you saved.
  • Ohm's Law Solver (V = IR)
    Solve Ohm's Law (V = IR) for voltage, current, or resistance. Enter any two values to instantly find the third, plus power dissipation.
  • Adding and Subtracting Polynomials Calculator
    Add or subtract two polynomials instantly. Enter expressions like 3x^2 + 2x - 5, choose + or -, and get the simplified result with like terms combined.
  • Function Transformation Calculator
    Apply shifts, stretches, and reflections to a function using g(x)=a·f(b(x−h))+k. Enter a, b, h, k and evaluate the transformed value at any x.
  • Markup Calculator
    Free markup calculator: enter cost and markup percentage to find selling price, profit, and profit margin instantly. Simple cost-to-price formula.
  • Multiply & Divide Fractions Calculator
    Multiply or divide two fractions and get the answer as a fully reduced fraction plus its decimal value. Free, instant, step-by-step formula included.
  • Binomial Expansion Full Coefficients Calculator
    Expand (a+b)^n and list every binomial coefficient C(n,k) and term. Free calculator for the binomial theorem with full step-by-step output.
  • Complex Number Power Calculator
    Raise a complex number a+bi to any power n using De Moivre theorem. Get the rectangular result, modulus and argument instantly.
  • Quadratic Sequence nth Term Calculator
    Find the nth-term rule Tn = an²+bn+c of a quadratic sequence from its first three terms, plus the value of any chosen term n.
  • Complex Number Square Root Calculator
    Compute the principal square root of any complex number a + bi instantly. Get the real and imaginary parts, modulus, and the second root.
  • Expand and Simplify Expression Calculator
    Expand and simplify (a·x+b)(c·x+d) with the distributive property and FOIL method. Get the simplified A·x²+B·x+C result instantly with steps.
  • Percent Tip Calculator
    Calculate the tip and total from any bill amount and tip percentage. Split the bill between people for a clean per-person amount.
  • Effective Annual Rate (APY) Calculator
    Convert a nominal annual interest rate into the effective annual rate (APY) using the compounding formula APY = (1 + r/n)^n − 1.
  • Round to Nearest 10/100/1000 Calculator
    Round any number to the nearest 10, 100, 1000 or decimal place. Free rounding calculator showing the result and how far it shifted from the original.
  • Argument of a Complex Number Calculator
    Find the argument (phase angle) of a complex number a+bi in radians and degrees using arg(z)=atan2(b,a). Also returns the modulus |z|.
  • Sales Tax Calculator
    Calculate sales tax and total price instantly. Enter a price and tax rate (%) to get the tax amount and final total. Free, fast, and accurate.
  • Slant (Oblique) Asymptote Calculator
    Find the slant (oblique) asymptote y = mx + c of a rational function by polynomial long division. Enter quadratic numerator and linear denominator coefficients.
  • Even or Odd Function Calculator
    Determine whether a power function f(x) = a·x^p is even, odd, or neither by comparing f(-x) with f(x) and -f(x). Free symmetry checker.
  • Logistic Growth Model Calculator
    Compute logistic population growth P(t) = K / (1 + A e^-rt) from carrying capacity, initial size, growth rate and time. Free, instant, with formula.
  • Complex Fraction Simplifier Calculator
    Simplify a complex fraction (a fraction divided by a fraction) instantly. Enter a/b over c/d to get the reduced fraction and decimal value.
  • Multiplying and Dividing Fractions with Variables Calculator
    Multiply or divide two fractions (rational expressions) by their coefficients and get the simplified, reduced result plus a decimal value instantly.
  • Three Variable Percent Equation Solver
    Solve the percent proportion part/whole = percent/100 for any unknown. Enter two values, pick what to solve for, and get the part, whole, or percent instantly.

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