Math and Statistics

  • What Percent Off Calculator
    Find the percent discount between an original price and a sale price. Enter both prices to see the percent off and the amount you saved instantly.
  • Unemployment Rate Calculator
    Calculate the unemployment rate as a percentage of the labor force from the number of unemployed people and the total labor force. Free and instant.
  • Degree and Leading Coefficient of a Polynomial Calculator
    Find the degree and leading coefficient of any polynomial. Enter coefficients highest-power first and instantly get the degree, leading term, and term count.
  • Quadratic Formula Calculator
    Solve ax²+bx+c=0 instantly with the quadratic formula. Shows the discriminant and real or complex conjugate roots step by step.
  • Completing the Square Calculator
    Solve any quadratic equation ax² + bx + c = 0 by completing the square. Get real roots, the discriminant, and the vertex instantly.
  • Win-Loss-Tie Percentage Calculator
    Calculate a team or player win percentage from wins, losses, and ties. Ties count as half a win, the standard sports winning percentage formula.
  • Percent Increase to Find New Value Calculator
    Find the new value after a percent increase or decrease. Enter the original value and the percent change to get the resulting amount instantly.
  • Batting Average Calculator
    Calculate a baseball or softball batting average (AVG) instantly from hits and at-bats. Get the standard 3-decimal AVG plus the percentage form.
  • Percent Needed to Recover After a Loss
    Find the percent gain needed to recover from a percentage loss. Enter your loss % and see the bigger gain required to break even again.
  • Percentage of Amount Calculator
    Calculate what a percentage of any amount is. Enter a percent and a value to instantly find the part, with the remainder shown too.
  • Percentage Increase Calculator
    Calculate the percentage increase from an old value to a new value. Enter both numbers to see the percent change and absolute difference instantly.
  • Continuous Compound Interest Calculator
    Calculate continuous compound interest with the formula A = Pe^(rt). Find the future value and total interest from principal, rate, and time instantly.
  • Overtime Pay Percentage Calculator
    Calculate overtime pay with any percentage uplift (time-and-a-half, double time). Enter hours, base rate and uplift % to see total OT pay and premium.
  • New Salary From Hike Percentage Calculator
    Calculate your new salary after a percentage hike. Enter your current salary and the raise percent to instantly see your revised pay and increase amount.
  • Marks Needed to Reach Target Percentage Calculator
    Find out how many more marks you need to hit your target percentage. Enter your target %, total marks, and current score to get the answer instantly.
  • What Number Is X% Less Than Y?
    Find what number is X percent less than Y. Enter the percent and the base number to instantly get the reduced value and the amount subtracted.
  • What Number Is X% More Than Y?
    Find the number that is X percent more than Y instantly. Enter a base value and a percentage increase to get the new total and the amount added.
  • Powerball Odds Calculator (US)
    Calculate Powerball odds for the jackpot and every prize tier (US rules: 5 of 69 white balls + 1 of 26 red). See your chance per ticket and across multiple lines.
  • Mega Millions Odds Calculator
    Calculate your Mega Millions jackpot odds (US lottery). Uses 1 / (C(70,5)×25) = 1 in 302,575,350 with a configurable ball matrix.
  • Simplify Rational Expression Calculator
    Simplify a rational expression by factoring the numerator and denominator quadratics and cancelling common factors. Shows steps, factors, and reduced form.
  • Standard Error of a Proportion Calculator
    Calculate the standard error of a sample proportion using SE = sqrt(p(1-p)/n). Enter your proportion and sample size for instant, accurate results.
  • Horizontal Asymptote Calculator
    Find the horizontal asymptote of a rational function by comparing numerator and denominator degrees. Returns y=0, the leading-coefficient ratio, or none.
  • Vertical Asymptote Calculator
    Find the vertical asymptotes of a rational function. Enter the denominator coefficients (a, b, c) and get every x = value where the function is undefined.
  • Factor by Grouping Calculator
    Factor by grouping calculator: enter a, b, x, y to factor ax+ay+bx+by into (a+b)(x+y) and verify the expanded value instantly.

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