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Probability Calculator

Files stay on your device · 100% private Runs in your browser

Dice sums, coin streaks, and custom favorable-over-total probabilities in one tool.

How it works: pick a tab. Two dice counts the 36 equally likely ordered pairs. Coin tosses use the binomial distribution for "at least this many heads". Custom computes favorable ÷ total, and with repeated tries applies 1 − (1 − p)n for at least one success.
Pick a tab; results update as you type.

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How to Use Probability Calculator

1

Select or Upload

Choose your file or paste your input into the workspace above. Drag and drop is supported.

2

Configure & Process

Adjust options to fit your task. Processing runs immediately with no waiting queue.

3

Download Result

Preview and save your output in one click with no watermarks or sign-up prompts.

Private & Confidential

Browser tools process files locally on your device, and server temporary files are deleted automatically within 15 minutes.

Free & No Registration

Full access to every utility without creating an account, signing in, or hitting paywalls.

Works on Any Device

Responsive layout that runs smoothly on desktop, tablet, and mobile browsers across all operating systems.

Frequently Asked Questions

Is Probability Calculator completely free to use?

Yes, Probability Calculator on KiloToolbox is 100% free with no limits, hidden fees, or account sign-up required.

Are my files safe and private?

Yes. Probability Calculator processes all files directly inside your web browser using client-side JavaScript and WebAssembly. Your files never leave your computer or mobile device and are never uploaded to any remote server.

Can I use Probability Calculator on mobile phones and tablets?

Yes, KiloToolbox is fully responsive and runs smoothly on iPhone, Android, iPad, Mac, Windows, and Linux.