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Math Calculators

Browse 15 free math calculators with transparent formulas, worked examples, assumptions, and cited sources.

Math

74 calculators

  1. Percent Off CalculatorCalculate discount savings, price after discount, optional sales tax, and the final checkout total.
  2. Proportion CalculatorSolve any one missing term in A divided by B equals C divided by D and show the completed proportion.
  3. Ratio CalculatorSimplify a multi-term ratio and scale every term from a selected position and target value.
  4. Average CalculatorCalculate arithmetic mean, sum, count, minimum, maximum, and range for a numeric list.
  5. Aspect Ratio CalculatorSimplify an original aspect ratio and calculate a proportional height from width or width from height.
  6. Pythagorean Theorem CalculatorSolve a right triangle’s missing leg or hypotenuse from either two known sides, then calculate area.
  7. Absolute Value CalculatorFind a number’s distance from zero or the absolute distance between two real-number points.
  8. Radical CalculatorFactor an integer radical into an exact simplified form and calculate its approximate principal real root.
  9. Long Division CalculatorDivide two integers and show quotient, remainder, decimal value, identity check, and digit-by-digit steps.
  10. Fraction CalculatorAdd, subtract, multiply, or divide simple or mixed fractions and return exact, mixed, and decimal results.
  11. Binomial Distribution CalculatorCalculate a success-count range probability and summary moments for a binomial random variable.
  12. Mean Absolute Deviation CalculatorCalculate mean absolute deviation about the arithmetic mean for a list of observations.
  13. Dilution Ratio CalculatorCalculate dilution by concentrate-to-diluent parts or by the C₁V₁ = C₂V₂ concentration equation.
  14. Gear Ratio CalculatorCalculate single-stage or compound multi-stage gear ratio and ideal output speed from tooth counts.
  15. Power-to-Weight Ratio CalculatorCalculate power-to-weight ratio in watts per kilogram and horsepower per pound.
  16. Point Slope Form CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  17. Supplementary Angles CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  18. Scalene Triangle Area CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  19. Expanded Form CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  20. Arc Length CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  21. Equilateral Triangle CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  22. Triangle 30 60 90 CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  23. Circumference To Diameter CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  24. Triangle 45 45 90 CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  25. Standard Form CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  26. Slope CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  27. Arithmetic Sequence CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  28. Common Multiple CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  29. Perp Line CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  30. Natural Log CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  31. Y Intercept CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  32. Surface Area CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  33. Systems Of Equations CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  34. Modulo CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  35. Unit Circle CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  36. Pythagorean Triples CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  37. Greater Less CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  38. Perimeter CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  39. Area CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  40. Right Triangle Area CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  41. Volume CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  42. Hexagon CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  43. Rectangular Prism Volume CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  44. Percentage Decrease CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  45. Cross Product CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  46. Geometric Sequence CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  47. Range CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  48. SSA Triangle CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  49. Length Width Area Rectangle CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  50. Sector Area CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  51. Isosceles Trapezoid Area CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  52. Rise Over Run CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  53. Exponential Function CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  54. Slope Intercept Form CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  55. DND Dice Roller CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  56. Mixed Number CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  57. Cartesian To Polar CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  58. Cosh CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  59. Least Common Denominator CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  60. Special Right Triangles CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  61. Rounding CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  62. Area Of Sphere CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  63. Spherical Coordinates CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  64. IQR CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  65. Trapezoid CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  66. Change Of Base CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  67. Unit Rate CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  68. Exponential Growth CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  69. 5 Number Summary CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  70. Circle Perimeter CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  71. Sum Of Series CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  72. Circumference CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  73. Distance CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  74. Sec CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.