{{ currentFlipText }}
{{ headCount }} Heads {{ tailCount }} Tails {{ headPercent }} % H / {{ tailPercent }} % T
  • Flip {{ totalFlips - i }}: {{ r ? 'Heads' : 'Tails' }}

Introduction:

A coin flip represents the simplest stochastic experiment, providing a one-in-two chance of landing heads or tails. Because each outcome is equally likely and independent of earlier trials, flipping a coin is widely used to illustrate fundamental probability concepts such as fairness, independence, and expected value in classrooms, decision making, and algorithm design.

This interactive tool lets you trigger unlimited virtual flips through a responsive button. A reactive engine instantly records each result, refreshes a donut distribution chart in a lightweight charting layer, and updates running totals and percentages. Because calculations happen locally, statistics refresh without delay, giving clear feedback on how randomness accumulates over successive trials.

Use it to demonstrate sample-size effects in probability lessons, settle friendly decisions, rehearse game theory scenarios, or inspect potential bias while calibrating physical coins. Outcomes are purely random and hold no monetary value; do not rely on them for wagering, contractual commitments, or any legally binding selection. Instead, treat every flip as an educational sample.

Features:

  • One-tap animated flip with realistic spin timing.
  • Running Heads/Tails counts and live percentages.
  • Responsive donut distribution chart for visual balance checks.
  • Scrollable flip history showing every result in reverse order.
  • Single-click reset that clears data and launches a fresh test flip.

Step-by-Step Guide:

Follow these quick steps to explore randomness and observe distribution trends:

  1. Press Flip Coin to animate a toss and log the result.
  2. Watch the large figure update to Heads or Tails as the coin settles.
  3. Check the donut chart for evolving balance between outcomes; hover for precise counts.
  4. Repeat flips to grow the sample size, or use Reset to clear statistics and start again.

FAQ:

Is my data stored?

No. Results live only in your browser session and disappear when you refresh or close the page.

How is fairness ensured?

Each flip uses a cryptographically strong random function built into modern browsers, giving an equal 50-50 chance.

How many flips can I run?

Thousands. Performance remains smooth because the reactive engine updates only small visual fragments on each toss.

Does the animation affect the result?

No. The outcome is determined before the spin starts; the animation merely visualises that predetermined value.

Can I export the statistics?

Not directly; copy counts or screenshots for reports. Future versions may add CSV download support.

Glossary:

Fair coin
Idealised coin with equal 50 % chance of either face.
Trial
Single flip event recorded in the history list.
Sample size
Total number of flips performed so far.
Ratio
Heads-to-tails proportion expressed as a percentage.
Donut chart
Circular chart showing how outcomes divide into two segments.

No data is transmitted or stored server-side.