Step-by-step solvers for arithmetic, fractions, algebra, geometry, statistics, and everyday finance. 100% free, no login, unblocked for school Chromebooks.
Try searching for fractions, equations, percentage, geometry, or unit conversions.
Step-by-step fraction reducer, improper fraction converter, common denominator finder with visual pie slices.
Find what percent X is of Y, percentage increase, decrease, sales tax, and tips with instant step-by-step math.
Calculate exact percent increase, percent decrease, and relative growth rate between any two values.
Reduce any proper or improper fraction to its simplest irreducible form with step-by-step prime factor cancellation.
Find the Greatest Common Factor and Least Common Multiple of 2, 3, or more integers with prime ladders.
Instant primality testing, interactive Sieve of Eratosthenes, and distance to nearest prime neighbors.
Generate interactive prime factor trees, exponential notation breakdowns, and canonical factorizations.
Test whether any large integer is evenly divisible by 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 with full rule proofs.
Interactive multiplication table grid and speed drill practice to master arithmetic fundamentals from 1 to 12.
Find all positive divisors and paired factor multiples for any integer with proper divisor classification.
Deconstruct numbers into thousands, hundreds, tens, ones, tenths, and write out full expanded notation.
Round numbers to nearest whole, tenth, hundredth, thousandth, or enforce strict scientific significant figures.
Simplify ratios a:b, find equivalent scaled proportions, and solve for unknown values in direct ratios.
Full-featured scientific calculator with trigonometry, logarithms, powers, parenthesized equations, and history tape.
Solve 1-step, 2-step, and multi-step linear equations for x with complete transposition and division steps.
Derive quadratic formula solutions step-by-step with discriminant analysis, imaginary roots, and vertex coordinates.
Compute any base raised to positive, negative, or fractional exponent powers with expansion explanation.
Compute common logarithms (base 10), natural logarithms (ln), and arbitrary base logs with change-of-base steps.
Convert standard decimal numbers to scientific notation (a × 10^b) and engineering notation with SI prefixes.
Calculate absolute value |x|, evaluate absolute equations, and visualize distance between coordinates on a number line.
Plot linear functions, quadratics, parabolas, and polynomial equations in an interactive 2D coordinate canvas.
Compute perimeter, surface area, and volume for circles, rectangles, cylinders, spheres, cones, and prisms.
Solve right triangles for hypotenuse, legs, angles, area, and trigonometric sine/cosine/tangent ratios.
Calculate sample and population standard deviation, variance, mean, and range for any custom data set.
Calculate measures of central tendency: arithmetic mean, median, mode list, range, and sorted array output.
Single event probability, independent/dependent compound probabilities, complementary events, and betting odds.
Calculate nCr combinations and nPr permutations with detailed factorial expansion and ordered vs unordered steps.
Calculate n! for positive integers up to 170 with full product chain expansion and scientific notation for large values.
Solve for speed, travel distance, or trip duration with instant conversion across mph, km/h, meters/sec, and knots.
Find final discounted price, total dollar savings, and sales tax addition for retail promotions and coupons.
Calculate tip percentage, total dining bill with gratuity, and divide payments evenly among multiple diners.
Calculate weighted and unweighted high school and college GPAs by entering course grades and credit hours.
Determine your current weighted class average and find the exact score needed on your final exam to earn your target grade.
Compute Body Mass Index in metric or imperial units, assess WHO weight categories, and view healthy weight targets.
Find exact chronological age in years, months, weeks, days, hours, and minutes, plus days until your next birthday.
Convert numbers across Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16) with bit steps.
Convert standard numbers (1–3999) to Roman numerals and translate ancient Roman numerals back to decimal notation.
Zero-latency unit conversions for length, mass/weight, volume, temperature, speed, area, and computer storage.
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