Math & Science
Percentage calculator, equation solver, and engineering & scientific computing tools
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(CLS Prevention Active 路 Zero Shift)Available Tools (15)
Percentage Master Calculator
All-in-one percentage calculator: What is X% of Y, proportion ratios, percentage change, and retail discounts.
Ohm's Law & Electric Power Calculator
Calculate Voltage, Current, Resistance, and Power instantly by providing any 2 known values.
Quadratic Formula & Linear System Equation Solver
Step-by-step quadratic equation solver with discriminant, complex roots, parabola vertex, and 2-variable linear systems.
GCD, LCM & Prime Factorization Calculator
Compute Greatest Common Divisor (GCD), Least Common Multiple (LCM), prime factorizations, and full divisor lists for any numbers.
Number List Descriptive Statistics Calculator
Calculate mean, median, mode, sample/population standard deviation, variance, quartiles, and outliers from raw number lists.
Permutation, Combination & Factorial Calculator
Calculate permutations (nPr), combinations (nCr), repeated combinations, and factorials (n!) with step-by-step reduction.
Normal Distribution Z-Score & Binomial Probability Calculator
Compute standardized Z-scores, percentile ranks, and binomial trial probabilities with real-time SVG bell curve area shading.
2x2 & 3x3 Matrix Calculator (Determinant & Inverse)
Compute 2x2 and 3x3 determinants, inverse matrices, transposition, trace, and matrix multiplication with step-by-step cofactors.
Right Triangle Pythagorean & Trigonometry Calculator
Solve right triangles via Pythagorean theorem and trigonometry, and oblique triangles via Law of Cosines and Heron's formula.
Circle, Sphere, Cylinder & Cone Volume Calculator
Calculate volume and surface area for circles, spheres, cylinders, cones, cuboids, and tori across metric and imperial units.
Logarithm (log, ln, log2) & Exponent Calculator
Evaluate common log10, natural ln, binary log2, arbitrary bases, exponential powers, roots, pH, and decibel scales.
Significant Figures (Sig Figs) & Scientific Notation
Count and round significant figures across standard rules and convert numbers into normalized scientific and engineering notation.
Molarity & Solution Dilution (C1V1 = C2V2) Calculator
Calculate molar mass, required reagent weight, and stock solution dilution (C1V1 = C2V2) with step-by-step laboratory preparation protocols.
Linear Interpolation & Extrapolation Calculator (Lerp)
Compute linear interpolation (Lerp) and extrapolation between two coordinate points, calculating slope, intercept, and linear equations.
Margin of Error & 95% Confidence Interval Calculator
Calculate survey margin of error (卤%) and confidence intervals across 90%, 95%, and 99% levels, with reverse sample size estimation.
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