Probability Calculator

About This Tool

Look, I get it—probability isn’t exactly everyone’s favorite topic. But sometimes you just need to know the odds. Whether you're flipping coins, rolling dice, or trying to figure out if your team actually has a shot at winning the championship, this calculator’s got your back. It’s not fancy. No animations, no pop-ups. Just a straightforward way to calculate probabilities without pulling your hair out.

I built this because I got tired of doing probability math in my head and getting it wrong. You know the feeling—halfway through a board game and suddenly you're Googling “probability of rolling two sixes.” Yeah. That’s why this exists.

Key Features

• Simple input fields—just type in your numbers and hit calculate. No dropdowns, no confusing menus.
• Supports basic probability scenarios: single events, combined events, conditional probability, and more.
• Shows step-by-step breakdowns so you can actually learn how the answer was reached. No black boxes.
• Works offline once loaded. No data sent anywhere. Your numbers stay yours.
• Mobile-friendly. Because let’s be real, you’re probably using this on your phone while arguing about card draws.
• Free. Always. No ads, no subscriptions, no “premium version” nonsense.

FAQ

Can I use this for real gambling?
Technically, yes. But don’t. This tool is for learning and casual use. Casinos don’t care about your probability calculations—they’ve already stacked the odds.

Why doesn’t it do Bayesian probability?
It could. But I kept it simple. Most people just need to know the chance of rain or whether their dice are cursed. If you need advanced stats, there are other tools. This one’s for the rest of us.