Yes. Our lottery and EV calculators use exact mathematical formulas. Our poker calculators use Monte Carlo simulations running thousands of iterations per second in your browser to provide an approximation that is statistically accurate to within a fraction of a percent.

No. These tools are for informational and educational purposes only. They calculate probabilities, which tells you what represents "good value" or a "mathematically correct decision" in the long run, but they cannot predict the random outcome of a specific event.

Yes, all calculators and resources on OddsCalculator.xyz are completely free. We do not require registration or credit card details.

No. All calculations are performed locally in your browser using JavaScript. No data about your hands, stakes, or strategies is sent to our servers.