Math’s

Chance Calculator: find the chance of a single event happening, with odds for and against it, plus expected occurrences over many trials.

Statistically Significant Calculator: test two conversion rates with a z-score, p-value and 95 percent verdict. Check your test results now.

Saddle Point Calculator: classify any critical point as a saddle, maximum, or minimum with the second-derivative test value D.

Optimization Calculator: find the maximum or minimum of a quadratic function, with the optimal x value and optimal value.

Multivariable Optimization Calculator: classify critical points as maxima, minima, or saddles with the second-derivative test.

Zero Force Member Calculator: identify zero-force members in a truss joint from member geometry, loads, and the classic rules.

Half Circle Calculator: find area, perimeter, arc length, and diameter of any semicircle from a single radius value fast.

Half Circle Area Calculator: find the area of a semicircle from radius, diameter, or circumference in seconds, step by step.

Rate Of Decay Calculator: find the decay constant, half-life and percentage lost from starting and remaining amounts over time.

Potential Energy Formula Calculator: solve gravitational or spring energy for mass, height, gravity, spring constant, or stretch.