- Fraction Calculator
- Matrix Calculator
- Slope Calculator
- Algebra Calculator
- Trigonometry Calculator
- Percentage Calculator
- Probability Calculator
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Double Discount CalculatorCalculate the final price after applying two successive (stacked) discounts. See your final price, total savings, and the true effective discount rate.
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Percentage Discount CalculatorCalculate the sale price and money saved from a percentage discount. Enter the original price and discount percent to instantly see your final price.
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Gamma Function CalculatorCompute the Gamma function Γ(z) for any real number using the Lanczos approximation. Handles negative non-integer values via the reflection formula.
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Geometric Distribution CalculatorCompute geometric distribution PMF, lower and upper cumulative probability, and mean for x failures before the first success with success probability p.
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Cross Multiplication CalculatorSolve proportions with the cross multiplication calculator. Enter a, b and c in a/b = c/x to instantly find the unknown value x. Free and accurate.
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Simplifying Radicals CalculatorSimplify any square root into the form a√b. Enter a number to get the simplified radical, coefficient, radicand, and decimal value instantly.
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Percentage Point CalculatorCalculate the percentage point (pp) change between two percentages and the relative percent change. Free, instant, and easy to use.
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Absolute Value Inequalities CalculatorSolve absolute value inequalities of the form |ax+b| < c, ≤, >, or ≥ c. Get the exact solution interval, boundary points, and step-by-step logic.
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System of Equations CalculatorSolve a 2-variable linear system a₁x+b₁y=c₁, a₂x+b₂y=c₂ instantly using Cramer's rule. Detects parallel/identical lines with no unique solution.
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Numerical Integration CalculatorEstimate a definite integral of f(x) over [a, b] with the Trapezoidal, Midpoint and Simpson's rules. Shows a convergence table as subdivisions double.
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Distance Formula CalculatorCalculate the straight-line distance between two points (x₁,y₁) and (x₂,y₂) using the distance formula d = √((x₂−x₁)² + (y₂−y₁)²).
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Slope Intercept Form CalculatorFind the slope-intercept equation y = mx + b from two points. Calculates slope (m) and y-intercept (b) instantly with steps.
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Logarithm Equation CalculatorSolve the logarithm equation log_b(x) = y for any unknown — base b, argument x, or value y — using x = b^y and the change-of-base rule.
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Fibonacci CalculatorCalculate the nth Fibonacci number instantly. Uses Binet's golden-ratio formula F(n)=round(φⁿ/√5) with exact iterative results and term sum.
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Normal Distribution Percentile Point CalculatorFind the percentile point (quantile) of a normal distribution from a lower- or upper-tail cumulative probability. Inverse normal CDF with custom mean and standard deviation.
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Ratio Unit Conversion CalculatorConvert a dimensionless ratio between percent, permille, permyriad (basis points), ppm, ppb, ppt and ppq instantly. Free universal ratio unit converter.
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Midrange CalculatorFree midrange calculator: find the midrange of a data set as (maximum + minimum) / 2. Enter numbers and instantly see the midrange, max, and min.
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Percentile Rank CalculatorCalculate the percentile rank of a score in a data set using PR = (below + 0.5×equal) / N × 100. Free, instant percentile rank calculator.
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Sum of Squares CalculatorCalculate the sum of squares (SS = Σ(xi − x̄)²) for any data set. Get mean, sum, count, and both population and sample variance instantly.
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Scientific Notation Arithmetic CalculatorAdd, subtract, multiply or divide numbers in scientific, E or engineering notation. Get the answer in scientific, E and engineering notation with SI prefix.
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Rounding Significant Figures CalculatorRound any number, decimal, or scientific notation to a chosen number of significant figures. Shows the rounded value and an unambiguous sig-fig presentation.
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Scientific Notation ConverterConvert any number to scientific notation, e notation, engineering notation, SI prefix, standard form, order of magnitude, expanded real number and English words.
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Scientific Notation to Decimal ConverterConvert scientific notation (a × 10^n) into standard decimal form instantly. Enter a coefficient and exponent to expand any number to its full decimal value.
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Binary to Decimal ConverterConvert any binary (base 2) number to decimal (base 10) instantly. Enter your bits and get the decimal value using the positional weight formula.
