Is this good for hobbyists & makers?

Yes — this version of "Dice Probability for an exam-score curve" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.

Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Hobbyists & Makers · Dice Probability

Dice Probability for an exam-score curve

Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate an exam-score curve live below — adjust the inputs and watch it respond, right in your browser.

Dice ProbabilityLive

the shape of chance

Controls

Presets

Number of dice

Sides per die

Target sum

Roll one die and every outcome is equally likely — a flat distribution. Roll several and sum them, and the shape becomes a bell: middle sums have many combinations, extremes have few. This is the central limit theorem in miniature, and why 7 is the most common roll of two dice and the heart of the game of craps.

▶ Run in Python

Data Inspector

P(sum = target)16.67%

Most likely sum7

Combinations36

Governing equation

E [sum] = \frac{n ( d + 1 )}{2} = \frac{2 ( 6 + 1 )}{2} = 7.0

Reading this result: Your target sits right at the peak: sums near the mean of 7 have the most combinations while the extremes have just one each — the central limit theorem in miniature.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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Frequently asked questions

Is this good for hobbyists & makers?: Yes — this version of "Dice Probability for an exam-score curve" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.