Educational

  • 529 College Savings Calculator
    Estimate how much your 529 college savings plan will grow with monthly contributions and compound returns. Free future value calculator for US families.
  • Letter Grade to Percentage Calculator
    Convert points earned to a percentage and letter grade instantly. Enter your score and total to see your percentage, letter grade, and 4.0 GPA.
  • WHIP Calculator
    Calculate a pitcher's WHIP (Walks plus Hits per Inning Pitched) instantly. Enter walks, hits, and innings pitched to get this key baseball stat.
  • wOBA Calculator
    Calculate Weighted On-Base Average (wOBA) from a hitter's walks, hits, home runs and plate appearances using standard linear-weight coefficients.
  • Effective Field Goal Percentage Calculator
    Calculate effective field goal percentage (eFG%) from FGM, 3PM and FGA. Free basketball shooting efficiency calculator with the standard eFG% formula.
  • Yards Per Attempt Calculator
    Calculate a quarterback's yards per attempt (Y/A) from passing yards and pass attempts. Free, instant football QB efficiency stat calculator.
  • Player Efficiency Rating (PER) Calculator
    Estimate a basketball player's efficiency rating from points, rebounds, assists, steals, blocks, misses and turnovers. Free per-36-minute PER calculator.
  • Reading Time Calculator
    Estimate how long it takes to read text. Enter word count and reading speed (WPM) to get reading time in minutes and seconds.
  • Percentage Increase / Decrease Calculator
    Calculate the percentage increase or decrease between two values instantly. Enter an original and new value to get the percent change and absolute difference.
  • Reading Level Calculator
    Calculate the Flesch Reading Ease score and Flesch-Kincaid Grade Level of your text from word, sentence, and syllable counts.
  • Permutations and Combinations Calculator
    Calculate permutations (nPr) and combinations (nCr) instantly. Enter n and r to find how many ways to arrange or choose items, with formulas and examples.
  • Slope and Y-Intercept Calculator
    Find the slope (m) and y-intercept (b) of a line from two points. Get the slope-intercept equation y = mx + b instantly with steps.
  • Logarithm Calculator
    Free logarithm calculator. Compute log base 10, natural log (ln), log base 2, or any custom base using log_b(x) = ln(x)/ln(b). Instant results.
  • Odds to Probability Calculator
    Convert odds (a:b) into a probability and percentage instantly. Supports odds in favor and odds against using P = a/(a+b). Free and accurate.
  • Percentile Rank Calculator
    Calculate the percentile rank of a score within a data set. Enter your numbers and a value to find what percentage falls below it. Free and instant.
  • ACT Composite Score Calculator
    Calculate your ACT composite score by averaging your English, Math, Reading, and Science section scores and rounding to the nearest whole number (1-36).
  • Classes Needed for Attendance Calculator
    Find how many classes in a row you must attend to reach a required attendance percentage. Enter classes attended, total held, and your target %.
  • Final Exam Weight Calculator
    Find out how much your final exam affects your course grade. Enter current grade, exam weight, and expected score to see your final percentage.
  • Study Time Calculator
    Convert college credit hours into recommended weekly study hours using the 2–3 hours per credit rule. See daily and full-semester study time too.
  • TOEFL iBT Score Calculator
    Calculate your total TOEFL iBT score by adding Reading, Listening, Speaking, and Writing (0–30 each) for a max of 120, with a CEFR level estimate.
  • Factors Calculator
    Find all factors (divisors) of any whole number instantly. See the full list, count, sum of factors, and whether the number is prime.
  • GCF and LCM Calculator
    Find the greatest common factor (GCF) and least common multiple (LCM) of two numbers instantly using Euclid's algorithm. Free, fast, and accurate.
  • Classes You Can Skip Calculator
    Free bunk calculator: find how many classes you can skip while staying above your required attendance percentage. Enter attended, total and required %.
  • Grade Needed to Raise Average Calculator
    Find the exact grade you need on your next assignment to raise your current average to a target. Free, instant grade-needed calculator.

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