📐 Math Calculators

Free math calculators for percentages, fractions, statistics, and geometry. All tools are free, accurate, and require no sign-up.

• 📊
  Percentage Calculator

  Calculate percentages, percentage change, and what percent one number is of another.
• ½
  Fraction Calculator

  Add, subtract, multiply, and divide fractions with step-by-step results.
• 🎲
  Random Number Generator

  Generate random numbers within any range, with or without duplicates.
• 📐
  Triangle Calculator

  Solve any triangle — find missing sides and angles using law of sines and cosines.
• 📉
  Standard Deviation Calculator

  Calculate mean, variance, and standard deviation for any data set.