Average, Median, Mode & Range Calculator
Calculate arithmetic mean, median, mode, range, standard deviation, and variance for any numerical data set. Free online descriptive statistics calculator.
Basic Calculator
Free standard basic desktop calculator online. Add, subtract, multiply, divide, square root, percent, and memory functions (M+, M-, MR, MC) with tape history.
Binary & Hexadecimal Programmer’s Calculator
Convert and calculate across Binary, Hexadecimal, Octal, and Decimal with bitwise operations (AND, OR, XOR, NOT, bit shifts) and interactive 32-bit switch grid.
Fraction Calculator
Calculate proper fractions, improper fractions, and mixed numbers online. Free fraction calculator with step-by-step reduction, common denominators.
Logarithm Calculator
Calculate logarithms for any base. Free online logarithm calculator supporting natural log (ln), common log (log10), binary log (log2), and antilogarithm.
Modulo Calculator
Calculate modulo and integer remainder online. Free modulo calculator supporting positive, negative, decimal, and modular congruence equations.
Percentage Change & Difference Calculator
Calculate percentage increase, percentage decrease, relative difference, and percentage of a total. Free online calculator with step-by-step formula breakdown.
Percentage Increase Calculator
Calculate percentage increase, percent decrease, and percentage difference online. Free percent change calculator with step-by-step formulas and retail markups.
Ratio & Proportion Calculator
Solve proportions A:B = C:D for unknown X, simplify complex ratios to lowest terms, and scale aspect ratios. Free online ratio calculator with step-by-step math.
Root Calculator & Radical Simplifier
Calculate square roots, cube roots, and arbitrary nth roots. Free online radical simplifier simplifying square roots into exact radical form with step-by-step math.
Rounding Calculator
Round numbers online to nearest integer, tenths, hundredths, thousandths, or significant figures using Round Half Up, Banker
Scientific Calculator
Perform advanced scientific calculations, trigonometry (sin, cos, tan), logarithms, powers, factorials, and memory registers free online with Scientific Calculator.
Scientific Notation Calculator
Convert numbers to scientific notation (a × 10^b), engineering notation, and E-notation. Perform addition, subtraction, multiplication, and division of scientific numbers.
Significant Figures Calculator
Calculate significant figures, identify sig fig rules, round numbers to N significant figures, and perform sig fig addition, subtraction, and multiplication.
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