Sensitivity and Specificity Calculator

Home Trusted Engineering Tools Turn diagnostic counts into sensitivity, specificity, predictive values, likelihood ratios, and accuracy without losing the population context. Use AxiCalculator to explore forward and reverse relationships, identify inconsistent inputs, and share a transparent result. Start calculating Inputs True positive False positive False negative True negative True positive * Auto False positive * […]

Permutation Calculator

Home Trusted Engineering Tools AxiCalculator turns order-sensitive counting problems into clear, exact arrangement counts without manual factorial work. Compare repetition rules, inspect generated selections, and reverse-solve missing values from one focused permutation workflow. Start calculating Set of objects Total number of objects n * Sample size r * I also want to see combinations Reset […]

Bayes’ Theorem Calculator

Home Trusted Engineering Tools Turn uncertain evidence into a clearer probability with AxiCalculator’s Bayes’ Theorem Calculator, built for fast forward and reverse solving. Enter the probabilities you know, inspect the updated result instantly, and challenge assumptions before turning evidence into a decision. Start calculating Enter any three probabilities P(A)* Calculated %v Search P(A) units P(B)* […]

Coin Toss Streak Probability Variables and Calculation

Home Trusted Engineering Tools Calculate the true probability of consecutive heads across an entire coin-toss sequence, including exact, at-least, and at-most longest streaks. Use AxiCalculator to test your intuition, explore random runs, and reverse-solve supported streak scenarios instantly. Start calculating Experiment specifics Number of flips* flips Search units Popular Units flips I am interested in […]

Dice Roller Calculator

Home Trusted Engineering Tools Roll any supported die or mixed dice set in seconds, then see every individual result and the combined total clearly. AxiCalculator keeps the roll fast, transparent, shareable, and ready for games, classrooms, remote sessions, or probability work. Start calculating Dice configuration Number of dice * Set all dice types to * […]

Dice Average Calculator

Home Trusted Engineering Tools Calculate the expected value and roll spread of common dice instantly, then see how reliable your dice pool really is. AxiCalculator turns d4 through d20 statistics into clear results for games, probability study, and better decision-making. Start calculating Dice setup Dice type * Tetrahedron (4 faces)Cube (6 faces)Octahedron (8 faces)Deltohedron (10 […]

Confusion Matrix Variables

Home Trusted Engineering Tools See exactly how your classifier succeeds and fails with a fast Confusion Matrix Calculator built for TP, FP, FN, TN, accuracy, precision, recall, F1, error rates, and MCC. Enter the values you know, compare the metrics that matter, and use reverse solving when one relevant matrix cell is missing. Start calculating […]

Chebyshev’s Theorem Calculator

Home Trusted Engineering Tools Use the Chebyshev’s Theorem Calculator to turn uncertain distribution shape into a clear, conservative probability bound. Enter the values you know, solve missing parameters in either direction, and understand exactly what your data can guarantee. Start calculating Formula P(|X – E(X)| ≥ k) ≤ variance / k^2 P(|X – E(X)| ≥ […]

Accuracy Calculator Variables

Home Trusted Engineering Tools Turn raw classification or measurement data into a result you can actually interpret with the AxiCalculator Accuracy Calculator. Check accuracy, sensitivity, specificity, prevalence effects, percent error, and reverse-solved values without losing sight of the mistakes hidden behind one percentage. Start calculating Select a method * Standard method Prevalence method Percent error […]

Coin Flip Probability Calculator

Home Trusted Engineering Tools Calculate exact, at-least, or at-most coin flip probabilities instantly for fair and biased coins, with clear results and reverse-solving support. Use AxiCalculator to turn confusing heads-and-tails questions into fast, interpretable probability answers. Start calculating Experiment specifics Number of flips * required flips Search units for number of flips I want to […]