Site Statistics

Aggregate data from every coin flip performed on Flip a Coin.com since January 26, 2024. Snapshot refreshed daily.

269,568,105
total flips performed
1,023 days · avg 263,507 / day

Heads vs Tails

An honest random coin flip should converge to 50% / 50% over many trials. Here is the result of every flip on this site, updated daily.

49.99%
Heads
134,770,263
50.01%
Tails
134,797,842

Result is essentially 50 / 50 (within 0.01 percentage points).

Distribution Pie

Law of Large Numbers live simulation

This chart runs fresh in your browser each visit, using the same cryptographic RNG (crypto.getRandomValues) that powers single flips on this site. Watch 1,000 simulated fair flips: the proportion of heads (cyan line) bounces wildly at first, then settles toward 0.5 (gold dashed line). Reloading the page generates a new random sequence — that's the demonstration. The math says any fair generator will show this convergence; refresh and see for yourself.

Learn more about the Law of Large Numbers in the classroom simulator article →

Random Walk live simulation

Same fresh simulation as the chart above (same cryptographic RNG), plotted differently. While the proportion of heads converges to 0.5, the count difference (heads minus tails) does not return to zero. It performs a random walk, drifting away from zero like the steps of a person without a destination. The gray band shows the ±2σ envelope, which contains the trajectory with about 95% probability for a fair coin. Reload to see a new walk.

After 100 fair flips, the expected gap between heads and tails is not zero but rather about 8. After 10,000 flips, the expected gap grows to about 80. The proportion shrinks because the denominator grows faster than the gap — not because the gap itself shrinks.

Learn more about random walks →

Is the coin truly fair? daily site data

A 50 / 50 split is the headline, but how do we prove the coin is fair? With 269,568,105 flips on record, we can apply two standard tests from inferential statistics: the Z-test for a proportion and the chi-squared goodness-of-fit test. Both ask the same question — “could random chance alone produce the bias we observe?” — and arrive at the same answer.

Total flips (n)269,568,105
Heads observed134,770,263  (p̂ = 0.499949)
Expected under fair coin (n · p) ?134,784,053
Standard deviation (σ = √(np(1−p))) ?8,209.26
Z-score ((X − np) / σ) ?-1.680
Chi-squared statistic (df = 1) ?2.822
Two-tailed p-value ?0.093006
95% confidence interval for p ?[0.499889, 0.500009] contains 0.5 ✓
Verdict ?Fair — The observed bias is consistent with a 50/50 coin. There is no statistical evidence of unfairness.

The Z-test and chi-squared test are exactly equivalent for two categories; Z² = χ²(df = 1). The p-value is computed from a normal approximation, accurate to about 4 decimal places at this sample size. With 269,568,105 flips, the test is so sensitive that any deviation greater than about 16,090 flips (just 0.0060% of all flips) would register as statistically significant — yet such a tiny deviation is meaningless in practice. Statistical significance does not mean practical bias.

See the interactive simulators behind these tests in our classroom article →

Heads and tails by currency daily site data

Every flip made with a real-world coin design, grouped by currency. A fair random source should keep each row close to 50% heads; the Z-score shows how far a row sits from an even split, in standard deviations.

CurrencyCoinsFlipsHeads %vs 50%Z
United States Dollar77,706,47749.996%−0.004 pp−0.22
Japanese Yen64,802,96049.968%−0.032 pp−1.41
Indian Rupee103,415,20850.005%+0.005 pp+0.18
Euro (Spain)83,375,04650.011%+0.011 pp+0.40
Euro (Austria)83,332,45450.000%+0.000 pp+0.01
50 State Quarters491,879,03549.992%−0.008 pp−0.22
British Pound Sterling81,183,09350.062%+0.062 pp+1.35
Australian Dollar6834,11849.994%−0.006 pp−0.12
Philippine Piso2338,83649.962%−0.038 pp−0.45
Kiribati Dollar1101,00049.999%−0.001 pp−0.01
Dutch Guilder1100,05349.789%−0.211 pp−1.34
Lithuanian Euro180,00049.984%−0.016 pp−0.09
Swiss Franc453,03650.049%+0.049 pp+0.23
Argentine Peso149,24850.382%+0.382 pp+1.69
Georgian Lari12,30049.391%−0.609 pp−0.58
Tunisian Dinar11,00052.600%+2.600 pp+1.64
Lebanese Pound110054.000%+4.000 pp+0.80
Ukrainian Hryvnia21450.000%0.000 pp0.00
Russian Ruble11060.000%+10.000 pp+0.63

Each currency name links to its most-flipped coin. Decision-making coins and crypto coins are listed in the per-coin table below.

Heads and tails by coin daily site data

All 111 coins with at least 10,000 recorded flips, most-flipped first.

CoinFlipsHeadsTailsHeads %Z
Heads or Tails Decision-Making Coins194,487,94997,233,30797,254,64249.995%−1.53
Yes or No Decision-Making Coins26,648,91813,323,39813,325,52049.996%−0.41
Bitcoin (BTC) Crypto Coins5,057,2422,527,4862,529,75649.978%−1.01
1 Euro Euro (Austria)3,093,7211,546,8961,546,82550.001%+0.04
Go or Stay Decision-Making Coins3,086,9451,541,4351,545,51049.934%−2.32
1 Euro Euro (Spain)3,067,4681,533,7491,533,71950.000%+0.02
Cardano (ADA) Crypto Coins2,444,3661,221,4781,222,88849.971%−0.90
1 Rupee Indian Rupee1,761,770881,250880,52050.021%+0.55
Presidential Dollar ($1) United States Dollar1,529,729765,072764,65750.014%+0.34
Quarter (25 cents) United States Dollar1,407,229702,956704,27349.953%−1.11
500 Yen Japanese Yen1,387,788693,490694,29849.971%−0.69
Sacagawea Dollar ($1) United States Dollar1,189,612594,987594,62550.015%+0.33
Penny (1 cent) United States Dollar1,174,913587,771587,14250.027%+0.58
Play or Work Decision-Making Coins1,138,601570,386568,21550.095%+2.03
Light or Darkness Decision-Making Coins1,112,072556,158555,91450.011%+0.23
Dime (10 cents) United States Dollar1,077,428538,539538,88949.984%−0.34
5 Yen Japanese Yen898,971448,418450,55349.881%−2.25
Study or Party Decision-Making Coins873,682436,873436,80950.004%+0.07
1 Yen Japanese Yen812,552406,473406,07950.024%+0.44
Outdoor or Indoor Decision-Making Coins735,451367,819367,63250.013%+0.22
Show the other 91 coins
CoinFlipsHeadsTailsHeads %Z
Exercise or Relax Decision-Making Coins726,060363,252362,80850.031%+0.52
Fish or Chicken Decision-Making Coins723,328361,738361,59050.010%+0.17
Half Dollar (50 cents) United States Dollar676,850338,566338,28450.021%+0.34
10 Yen Japanese Yen657,184328,862328,32250.041%+0.67
Nickel (5 cents) United States Dollar650,716325,041325,67549.951%−0.79
Up or Down Decision-Making Coins612,249306,388305,86150.043%+0.67
50 Yen Japanese Yen543,505271,460272,04549.946%−0.79
100 Yen Japanese Yen502,960251,236251,72449.951%−0.69
Wake Up or Sleep In Decision-Making Coins478,092239,324238,76850.058%+0.80
Coffee or Tea Decision-Making Coins454,910228,152226,75850.153%+2.07
10 Rupees Indian Rupee454,528227,828226,70050.124%+1.67
Spontaneity or Planning Decision-Making Coins448,204224,289223,91550.042%+0.56
5 Rupees (2009–2010) Indian Rupee432,051215,733216,31849.932%−0.89
Shopping or Saving Decision-Making Coins431,636215,455216,18149.916%−1.11
Procrastinate or Do It Now Decision-Making Coins414,913207,284207,62949.958%−0.54
More or Less Decision-Making Coins386,632193,259193,37349.985%−0.18
Analog or Digital Decision-Making Coins354,295177,046177,24949.971%−0.34
Georgia 50 State Quarters350,417174,765175,65249.873%−1.50
One Pound (£1) British Pound Sterling302,724151,706151,01850.114%+1.25
5 Rupees Indian Rupee268,299134,165134,13450.006%+0.06
Twenty Cents (20c) Australian Dollar268,217133,950134,26749.941%−0.61
Two Pounds (£2) British Pound Sterling266,094133,401132,69350.133%+1.37
Watching or Reading Decision-Making Coins264,211132,522131,68950.158%+1.62
50 Paise Indian Rupee264,038131,562132,47649.827%−1.78
Start or Stop Decision-Making Coins246,150123,112123,03850.015%+0.15
20 Piso Philippine Piso238,836119,220119,61649.917%−0.81
Hot or Cold Decision-Making Coins213,191106,910106,28150.148%+1.36
5 Cents Euro (Spain)200,088100,47599,61350.215%+1.93
Ten Pence (10p) British Pound Sterling190,42295,52294,90050.163%+1.43
Fifty Cents (50c) Australian Dollar188,93494,33394,60149.929%−0.62
Fast or Slow Decision-Making Coins180,60190,41490,18750.063%+0.53
Virginia 50 State Quarters172,66586,47686,18950.083%+0.69
Fifty Pence (50p) British Pound Sterling144,41572,23872,17750.021%+0.16
25 Paise Indian Rupee137,56868,73368,83549.963%−0.28
One Dollar ($1) Australian Dollar136,24668,55867,68850.319%+2.36
Two Pence (2p) British Pound Sterling124,77162,18562,58649.839%−1.14
Twenty Pence (20p) British Pound Sterling119,83359,94559,88850.024%+0.16
Two Dollars ($2) Australian Dollar118,38559,20259,18350.008%+0.06
Wyoming 50 State Quarters110,00054,84155,15949.855%−0.96
Ten Cents (10c) Australian Dollar106,90653,18553,72149.749%−1.64
2 Cents (0.02) Kiribati Dollar101,00050,49950,50149.999%−0.01
Ohio 50 State Quarters100,36750,24250,12550.058%+0.37
1 Guilder (1897) Dutch Guilder100,05349,81550,23849.789%−1.34
10 Piso Philippine Piso100,00050,06849,93250.068%+0.43
Maine 50 State Quarters98,49648,92549,57149.672%−2.06
2 Euros Euro (Austria)96,76348,39448,36950.013%+0.08
Alaska 50 State Quarters90,56145,20345,35849.914%−0.52
Texas 50 State Quarters88,01244,15343,85950.167%+0.99
1 Euro Lithuanian Euro80,00039,98740,01349.984%−0.09
Pennsylvania 50 State Quarters78,18139,01239,16949.900%−0.56
5 Cents Euro (Austria)69,08834,66334,42550.172%+0.91
Hawaii 50 State Quarters67,33233,95933,37350.435%+2.26
Vermont 50 State Quarters65,32032,72232,59850.095%+0.49
Minnesota 50 State Quarters58,35729,25029,10750.123%+0.59
Nevada 50 State Quarters52,75126,19826,55349.664%−1.55
1 Franc (1 CHF) Swiss Franc50,89925,47625,42350.052%+0.23
Mississippi 50 State Quarters50,00325,09624,90750.189%+0.85
½ Argentino (1884) Argentine Peso49,24824,81224,43650.382%+1.69
Connecticut 50 State Quarters49,03924,52424,51550.009%+0.04
Florida 50 State Quarters42,13321,21120,92250.343%+1.41
Wisconsin 50 State Quarters39,89919,86520,03449.788%−0.85
10 Paise Indian Rupee35,39117,68717,70449.976%−0.09
Montana 50 State Quarters34,13417,22416,91050.460%+1.70
2 Euros Euro (Spain)34,03717,11516,92250.284%+1.05
1 Cent Euro (Austria)33,12716,36916,75849.413%−2.14
1 Cent Euro (Spain)32,99716,29716,70049.389%−2.22
South Dakota 50 State Quarters30,78615,26415,52249.581%−1.47
2 Rupees (Nritya Mudra Series) Indian Rupee30,07215,03915,03350.010%+0.03
Kentucky 50 State Quarters28,16313,96614,19749.590%−1.38
50 Cents Euro (Austria)27,91614,03113,88550.261%+0.87
50 Cents Euro (Spain)27,28313,71513,56850.269%+0.89
1 Rupee (Nritya Mudra Series) Indian Rupee26,09612,96213,13449.670%−1.06
Colorado 50 State Quarters25,98213,01612,96650.096%+0.31
Kansas 50 State Quarters21,30510,67510,63050.106%+0.31
One Penny (1p) British Pound Sterling20,61010,22610,38449.617%−1.10
Oregon 50 State Quarters18,0729,0529,02050.089%+0.24
New York 50 State Quarters15,5907,8617,72950.423%+1.06
Tennessee 50 State Quarters15,5337,7927,74150.164%+0.41
Five Cents (5c) Australian Dollar15,4307,7777,65350.402%+1.00
West Virginia 50 State Quarters14,7777,3687,40949.861%−0.34
Five Pence (5p) British Pound Sterling14,2247,0587,16649.620%−0.91
Missouri 50 State Quarters13,6636,8046,85949.799%−0.47
New Mexico 50 State Quarters13,4576,6906,76749.714%−0.66
New Jersey 50 State Quarters13,2456,6406,60550.132%+0.30
Arizona 50 State Quarters13,0956,5616,53450.103%+0.24
Iowa 50 State Quarters12,1836,1106,07350.152%+0.34
North Carolina 50 State Quarters11,6805,9245,75650.719%+1.55
Maryland 50 State Quarters11,6685,8675,80150.283%+0.61
New Hampshire 50 State Quarters10,2205,1435,07750.323%+0.65
Washington 50 State Quarters10,1675,0905,07750.064%+0.13
South Carolina 50 State Quarters10,0004,9485,05249.480%−1.04

With this many rows, a few Z-scores beyond ±2 are expected by chance alone (about 1 row in 20).

What these tables count — and their limits

  • They record this site’s random number generator, not the physics of real coins. A single flip is drawn in your browser with crypto.getRandomValues(); multi-flip runs are generated on the server with PHP random_bytes(). The coin design on screen plays no part in the result.
  • Results are reported to the server by the visitor’s browser after each flip. The server accepts at most 100,000 flips per report and rejects any report of 100 or more flips whose heads–tails gap is more than five standard deviations wide.
  • Counters are updated without database locking, so when many reports arrive at once a small share can be lost or only partly recorded.
  • Counting began on January 26, 2024. The tables are rebuilt once a day at 03:00 UTC and cover published coins only; coins with fewer than 10,000 flips are left out of the per-coin table.
  • The site-wide total at the top of this page adds up the counters of every coin, including coins that are no longer listed. Until November 2026 it also added the per-background counters, which record the same flips a second time, so the total shown here used to be about 60% too high. The heads and tails percentages were barely affected.
  • Flips made through the API and the embeddable widget are counted separately (see below) and are not part of these tables.

Top 10 Most Popular Coins

Top 10 Flip Counts

Most popular flip counts chosen by users — number of times each count was selected.

API Usage /api/flip

Flips performed via the public JSON API at /api/ — primarily by AI assistants and integrated apps. Counted separately from on-site and widget flips.

1,023,300
flips via API
1,038 requests · 511,951 heads / 511,348 tails

Top Coins (API)

CoinHeadsTailsFlips
fcc-heads-or-tails511,872511,2711,023,144
fcc-yes-or-no6154115
usd-25cent7815
ccc-bitcoin134
fcc-go-or-stay202
ccc-cardano011
usq-texas101
fcc-hot-or-cold011
fcc-outdoor-or-indoor011
fcc-play-or-work101

Integrate the API in your app or AI assistant: see /api/ (developer docs) or /ai-integration/ (Claude Desktop / ChatGPT setup).

Embed Widget Usage /widget/

Flips performed via the embeddable widget on third-party sites. Counted separately from on-site flips.

934
flips via embed
934 actions · 469 heads / 465 tails

Get your own embed at /widget/.

Snapshot updated: Nov 14, 2026 03:00 UTC. Refreshed daily at 03:00 UTC.

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