Math Calculators
Type your own numbers and watch the method unfold, one step at a time, the way a teacher would show it.
- PercentagePercent of a number, what percent, % change, adding or taking off a percentLive
- Long divisionDivide, multiply, subtract, bring down, animatedLive
- FractionsAdd, subtract, multiply, divide and simplifyLive
- Decimal to fractionIncluding repeating decimals like 0.333… and 0.1666…Live
- Fraction to decimalLong division, and whether the decimal ends or repeatsLive
- Percent to fractionAny percent as a fraction in lowest terms and as a decimalLive
- Quadratic formulaExact roots, the discriminant and a graphLive
- Polynomial divisionLong and synthetic division, with the remainder theoremLive
- Pythagorean theoremThe hypotenuse or a missing side, exactly, and is it a right triangle?Live
- Roof pitchPitch, angle, grade and rafter lengthLive
- Speed, distance and timeAny one from the other two, with the formula triangleLive
- Ohm’s lawVoltage, current, resistance and power from any twoLive
- Unit converterLength, weight, volume, temperature and more, with the units cancellingLive
- Land areaBigha, katha, decimal (shotok), kani, acres and square feetLive
- AgeExact age in years, months and days, and the next birthdayLive
- Days between datesDays, weeks, months and weekdays from one date to anotherLive
- Ratios and proportionsSimplify, share, solve proportions and the rule of threeLive
- GCF (GCD, HCF)Greatest common factor by prime factors and Euclid’s methodLive
- LCMLeast common multiple, with a Venn diagram of prime factorsLive
- Prime factorizationAn animated factor tree and the exponent formLive
- Is it prime?The square-root test, with the factors when it isn’tLive
- Number base converterBinary, octal, decimal, hex and any base from 2 to 36Live
- Decimal to binaryDivide by 2 again and again, and read the remainders upLive
- Binary to decimalAdd up the place values of the 1sLive
Which one do I need?
- Percentages, discounts, increases and percentage change: the percentage calculator.
- Dividing on paper, with a remainder or a decimal answer: the long division calculator writes out every step.
- Fractions and mixed numbers: the fraction calculator adds, subtracts, multiplies, divides and simplifies, with fraction bars.
Teachers: every calculator has a full-screen mode for the classroom, and share links that open straight on an example.