1,000 simulated coin tosses - instantly

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Flip a Coin 1,000 Times

1,000 simulated coin tosses - instantly

Please enter a valid number between 1 and 1,000,000.
Heads
0
0%
Tails
0
0%
Head Wins
0
Tail Wins
0
Total Flips
0

How to Use This Simulator

  1. 1
    The flip count is pre-set to 1000. Change it to any number up to 1,000,000.
  2. 2
    Click Flip Now! to run all coin tosses instantly in your browser.
  3. 3
    Read the heads and tails counts with percentages for the current round.
  4. 4
    Session totals track cumulative wins across multiple rounds until you reset.

1,000 Flips and the Law of Large Numbers

At 1,000 flips the Law of Large Numbers becomes clearly visible. Results will almost always land within 3% of perfect 50/50 - typically between 470 and 530 heads. It's a compelling demonstration of how randomness 'evens out' at scale.

Frequently Asked Questions

The standard deviation is ~15.8. About 95% of results land between 469 and 531 heads - within 3.2% of perfect.
The probability is astronomically small - around 1 in 10²⁰. For practical purposes, it won't happen.
It's strong evidence, but statisticians typically use hypothesis testing (e.g. chi-squared) to formally assess fairness.