Games calculators

Coin Flip Simulator & Probability Calculator

This coin flip simulator flips 1-500 virtual coins (fair or weighted) and shows the heads/tails split and longest streak, or use the probability calculator for exact binomial odds on any specific outcome.

Reaction Time Test

Test your simple reaction time over several trials, then compare your average, best, median, and consistency against reaction-time figures from published research.

Click Speed Test

Use this click speed test to check your clicks per second (CPS) and clicks per minute, then compare against the clinical single-finger tapping range from neuropsychology research.

Dice Roller & Probability Calculator

Roll 1-20 dice from d4 to d100 with a modifier, plus D&D 5th Edition advantage/disadvantage on a d20, or switch to the probability calculator for the exact odds of hitting any total.