Herramientas matemáticas

Compute sin, cos, tan, csc, sec, cot, and inverse trig functions in degrees or radians with exact values and step-by-step work.

Calculate permutations nPr and factorials n! for ordered arrangements with formulas and step-by-step work.

Fit a linear regression line to (x, y) data — slope, intercept, equation, correlation r, R², and predictions with step-by-step work.

Convert raw scores to z-scores and back using z = (x − μ) ÷ σ, with percentile and step-by-step work.

Convert numbers to and from scientific notation, e-notation, and engineering notation. Enter decimals (299792458), e-notation (1.23e-5), or 1.23 × 10^5 format. Get normalized scientific, Unicode superscript, engineering (×10³), and decimal forms. Adjustable significant figures. Free, browser-based.

Count significant figures, round to N sig figs, and add, subtract, multiply, or divide with correct precision rules. Enter decimals, trailing zeros, or scientific notation. Free, instant, browser-based.

Calculate sample size for surveys, mean estimates, A/B tests, and two-group comparisons. Set confidence level, power, margin of error, and effect size. Step-by-step formulas. Free, browser-based.

Plot data as line, scatter, or bar charts from x,y pairs or separate columns. Enter lab results, calibration curves, or trial data — get an instant SVG chart with axis labels. Free, browser-based.

Graph mathematical functions y = f(x) instantly. Enter expressions like sin(x), x^2, exp(x), or multiple functions — get an SVG plot with axes, grid, and auto-scaling. Free, browser-based.