Educational

  • Percent Off / Discount Calculator
    Calculate the final sale price and amount saved after a percent-off discount. Enter the original price and discount percentage to see what you pay.
  • Percentage Change Word Problem Practice Calculator
    Practice percentage change word problems. Enter old and new values, type your answer, and instantly check it against the full worked solution.
  • Division Word Problem Practice Calculator
    Practice division word problems: cut a tube of a given length into equal pieces, type your answer, and instantly check it with a full worked solution.
  • Final Grade Calculator
    Find the grade you need on your final exam to hit your target, or calculate your overall course grade from your final score. Free weighted grade tool.
  • Significant Figures Counter
    Count how many significant figures are in any number - whole numbers, decimals, scientific notation and e-notation - and see which digits are significant.
  • Number and Word to Standard Notation Calculator
    Convert a number-word phrase like "16.76 Trillion" into full standard notation with comma separators plus scientific notation. Short-scale naming.
  • Multiplication Tables Practice Quiz (1-12)
    Practice multiplication facts and times tables 1 to 12. Fill in the missing product or multiple, get instant feedback, and view a full reference grid.
  • Long Multiplication Calculator
    Multiply two numbers with the standard long multiplication algorithm. See every partial product, carry digit, the digit grid, and step-by-step worked solution.
  • Multiples of a Number Calculator
    Generate the first 100 multiples of any positive integer, optionally only those strictly greater than a minimum value. Fast, accurate, comma-separated list.
  • Long Division Calculator with Decimals
    Divide a dividend by a divisor to any number of decimal places. Truncates (does not round) the quotient. Handles negative and decimal inputs.
  • Long Subtraction Calculator with Regrouping
    Subtract two whole numbers using the long-subtraction (borrowing/regrouping) method. See the answer plus a full column-by-column step-by-step solution.
  • Long Division Calculator with Remainders
    Free long division calculator that returns the whole-number quotient, remainder, and full step-by-step work so you can check any hand-worked division problem.
  • Lattice Multiplication Calculator
    Multiply two whole numbers and see the full lattice (gelosia) grid worked out step by step. Free lattice multiplication calculator with diagonals and product.
  • Expanded Form and Word Form Calculator
    Convert any number into expanded notation, expanded factors, expanded exponential form, and English word form. Great for place-value math practice.
  • Yu-Gi-Oh! Life Points Calculator
    Track Life Points for both players in a Yu-Gi-Oh! duel. Enter damage or healing per round, see running totals, and find the winner. Starts at 8000 LP.
  • NFL Draft Pick Value Trade Calculator
    Compare NFL draft-pick trades using the classic Jimmy Johnson value chart. Enter each side's pick numbers to see total points, the winner, and the gain percent.
  • Earned Run Average (ERA) Calculator
    Calculate a pitcher's Earned Run Average (ERA) from earned runs and innings pitched. Supports 9-inning baseball, 7-inning softball and 6-inning Little League.
  • Roman Numeral Converter
    Convert numbers to Roman numerals and Roman numerals to numbers, both ways. Supports 1 to 3,999,999 using overlines (underscore = x1000), with a place-value breakdown.
  • Roman Numeral Calculator
    Free Roman numeral calculator: add, subtract, multiply or divide two Roman numerals or numbers. Get the answer in Roman and Arabic form with steps.
  • What Grade Was I In Calculator
    Find what US grade you were in during any school year. Enter your birth year and the year to get your K-12 grade level instantly.
  • NaNoWriMo Word Count Calculator
    Calculate how many words per day you need to win NaNoWriMo. Enter words written, days left, and your goal to stay on pace for 50,000 words.
  • High School GPA Calculator
    Calculate your high school GPA on the US 4.0 scale. Supports weighted GPA with Honors (+0.5) and AP/IB (+1.0) bonuses and credit-weighted averaging.
  • Test Grade Calculator
    Free test grade calculator: enter correct answers and total questions to get your score percentage and letter grade instantly.
  • PTE Score Calculator
    Estimate your PTE Academic overall score from Speaking, Writing, Reading and Listening communicative scores (10–90) plus the CEFR band.

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