UD5 Toolkit
A/B Test Significance Calculator - Online Simple Stats Tool
Check if your A/B test results are statistically significant using chi-squared test. Enter visitors & conversions for control/variant. Results in plain English.
Tag: Statistical Calculator
7+ toolsCoin Toss Probability Demonstrator – Online Long‑Run Simulator
Virtual flip coins thousands of times and see the heads/tails ratio converge to 50%. Interactive law of large numbers.
Error Function (erf) Calculator - Online Statistics & Physics
Compute the error function and complementary error function for any real x. Quick and precise. Pure frontend math.
Dice Roll Simulator & Stats - Online Massive Roll Trials
Roll any number of dice thousands of times and see a live bar chart of the sum distribution. Great for game designers.
Confidence Interval Calculator - Online Mean & Proportion
Compute confidence intervals for a population mean (known/unknown sigma) and proportion. All popular Z/T values. Local.
Coin Toss History & Statistics - Online Fairness Tracker
Flip a coin and track your full history. See percentage of heads/tails and longest streak. Pure RNG, no bias.
PRNG Validator - Online Check Randomness Pattern
Paste a list of numbers to visually check uniformity, mean, and simple pattern analysis. Educational tool for statistics and RNG.