Math & Science Calculators

Calculate pressure and volume changes using Boyle's Law (P₁V₁ = P₂V₂). Solve for any unknown variable with this interactive gas law calculator.

Calculate the perimeter of a decagon (10-sided polygon). Enter side length for regular decagons or all 10 sides for irregular decagons. Get area, angles, and diagonals.

Calculate the perimeter of a circular sector (pie slice shape). Enter radius and central angle to find perimeter, arc length, area, chord length, and more.

Calculate cylinder surface area including total, lateral (curved), and base areas. Enter radius and height to get complete results with formulas.

Calculate arc length, sector area, and chord length from radius and central angle. Supports degrees and radians with step-by-step formulas.

Calculate the volume of solids of revolution using the cylindrical shell method. Visualize shells, see step-by-step integration, and compare with disk/washer methods.

Calculate fold change, log2 fold change, and percent change between values. Essential for gene expression analysis, cell proliferation, and scientific research.

Calculate distance from height and angle using trigonometry. Find horizon distance, free fall time, and slope distance. Essential for surveying, navigation, and physics.

Calculate water potential (Ψ) for plant cells and solutions. Enter molarity, temperature, and pressure potential to find solute potential and predict water movement.

Calculate F-statistics (FST, FIS, FIT) for population genetics. Enter heterozygosity values to measure genetic differentiation, inbreeding, and gene flow between populations.

Calculate Hilsenhoff Biotic Index (HBI) for water quality assessment. Enter macroinvertebrate taxa counts and tolerance values to evaluate stream health and pollution levels.

Calculate cross product of two 3D vectors. Enter i, j, k components to find perpendicular vector, magnitude, direction, and unit vector with detailed steps.

Factor trinomials ax² + bx + c instantly. Enter coefficients to get factored form, step-by-step solutions, and verify results with detailed explanations.

Analyze signals with FFT: set sampling rate and length, choose window and zero‑padding, then view magnitude and phase spectra with peak markers.

Compute the least common multiple (LCM) of 2–10 positive integers. Enter values, get step-by-step method using GCD or prime factors, and share deep links to preset inputs.

Multiply decimals accurately with step-by-step examples, place value alignment, and consistent rounding. Enter two decimals, set precision, and get product with steps and tips.

Multiply polynomials with step-by-step solutions and detailed explanations. Enter coefficients to get instant results with distributive property breakdown.

Multiply matrices of common sizes (2×2, 3×3, 2×3×3×2) with step-by-step workings, rules, and examples. Copy results as CSV/LaTeX for homework or research.

Compute eigenvalues and eigenvectors for 2x2 and 3x3 matrices. Supports analytic solution (2x2) and QR iteration (3x3); includes examples, steps, and interpretation.

Multiply fractions step by step: cross-cancel, multiply across, and auto-simplify to lowest terms or mixed numbers. Supports negatives.

Perform long multiplication step by step with partial products and carry explanations. Enter two integers to see aligned steps and the final product.

Solve a:b = c:d with cross-multiplication, find missing values, simplify ratios, set precision, and check proportionality.

Calculate population or sample variance with clear steps and formula. Paste data, choose mode/precision, get variance, mean, sum of squares and standard deviation.

Mixed number calculator for add, subtract, multiply, divide, and convert. Switch between mixed, improper fraction, and decimal with clear steps and results.

Calculate trigonometric functions using the unit circle. Find exact values for sin, cos, tan, and other trig functions with our free online calculator. Perfect for students and professionals.

Solve quadratic equations by completing the square. See step-by-step process, vertex (h,k), discriminant and solutions for ax²+bx+c=0.

Free AP Statistics calculator for mean, median, mode, standard deviation, variance, quartiles, skewness, kurtosis, z-scores and percentiles.

Estimate your AP U.S. History composite and predicted 1–5 score from MCQ, SAQ, DBQ and LEQ. Uses College Board section weights.

Calculate eigenvectors and eigenvalues of 2x2 and 3x3 matrices with step-by-step solutions. Essential linear algebra tool for engineering, physics, and data analysis.

Calculate weighted GPA, semester averages, and academic performance. Supports percentage, letter grades, and 4.0 scale with credit hours.