Flip a Coin 100 Times — Free Online Simulator
Bulk Coin Flipper lets you flip a coin 100 times — or 10, or 1,000, or up to 10,000 — in one tap, and shows you the exact sequence of heads and tails rather than just a total. You get the running order, the heads/tails counts, the percentage split, and a copy button for pasting the whole run into a spreadsheet. There's an optional weighted-coin setting for simulating an unfair coin. Free, no sign-up, and every flip is generated in your browser — nothing is sent to a server.
Set how many times to flip — anything from 1 to 10,000 — and tap Flip. You'll get the heads and tails totals, the percentage split, and the exact sequence in order. Open Advanced first if you want a weighted coin instead of a fair 50/50 one.
Ready to run a batch of flips?
Use the free Bulk Coin Flipper →What This Tool Does
Most online coin flippers give you one flip at a time. That's fine for settling an argument, but useless when you actually need a batch — a statistics homework sample, a probability demonstration, a randomised assignment list, or a quick sanity check on how streaky randomness really is. Flipping a real coin 100 times and writing down each result takes about ten minutes and you'll lose count.
This tool does the whole run instantly and keeps the part that matters: the chronological sequence. You see every flip in the order it happened, not just "52 heads, 48 tails". That's what makes it usable as a data source rather than a novelty — you can count streaks, look for runs, or copy the sequence straight out and analyse it elsewhere.
How to Flip a Coin 10, 50, 100, or 1,000 Times
Three steps, a couple of seconds:
- Open capsuletools.app/bulk-coin-flipper/
- Type how many flips you want, or tap a quick-set chip — 10, 50, 100 or 1,000
- Tap Flip — the whole run appears immediately
Any number from 1 to 10,000 works, so you're not limited to the presets. On the results screen, Flip again re-runs the same settings for a fresh batch — handy for seeing how much the split moves from run to run — and the back arrow returns you to the settings if you want to change the count.
Reading Your Results — Sequence, Totals, and Split
The results screen leads with the aggregate: the number of heads and the number of tails, each with its percentage, above a bar showing the split visually. Underneath is the sequence itself, in the order the flips happened.
- Up to 240 flips, each flip is a chip you can scan at a glance — filled for heads, outlined for tails
- Above that, the sequence becomes numbered rows of ten (grouped in fives) so a 10,000-flip run stays readable and scrolls smoothly
- Copy sequence puts the whole run on your clipboard as comma-separated
HandTvalues, which pastes cleanly into a spreadsheet cell or a text file
Reading a long run is the interesting part. In 100 flips you'll almost always find a streak of six or seven of the same face — people consistently guess that a "random" sequence should alternate much more than it really does, which is exactly why a real sample is more convincing than a total.
Setting a Custom Weighted Coin (Advanced)
Tap Advanced on the settings screen to reveal the coin-weight slider. It sets the chance of heads anywhere from 1% to 99%, with tails taking the remainder — so a 60/40 coin, a 90/10 coin, or anything in between. The whole run is then flipped with that bias.
A custom weighted coin flip is useful whenever the event you're modelling isn't an even chance: a 70%-reliable free-throw shooter, a one-in-ten drop rate, a loaded coin for a probability lesson. The results screen labels any weighted run so you never mistake a biased batch for a fair one, and Reset to 50 / 50 puts the coin back to normal in one tap.
Why This Is True Random (Web Crypto API)
Every flip is drawn from crypto.getRandomValues() — the browser's
cryptographically secure random number generator, seeded from your operating
system's entropy pool. Most online coin flip generators use Math.random(), which is a
fast but statistically weaker pseudo-random generator that was never designed to be unpredictable.
At the default 50/50 weight the outcome comes down to a single unbiased bit, so the fair coin is exactly fair — no drift, no pattern, no repeating cycle you could detect across 10,000 flips. And because the generator lives in your browser, no server is involved: your flips are never transmitted, logged, or stored anywhere. You can add the tool to your home screen and it works the same way.
Frequently asked questions
What happens if you flip a coin 100 times?
You should expect roughly 50 heads and 50 tails, but almost never exactly 50/50. For 100 flips the standard deviation is 5, so about two runs in three land between 45 and 55 heads, and about 19 in 20 land between 40 and 60. Streaks are normal too — a run of 100 flips usually contains a stretch of six or seven identical results, which feels rigged but is exactly what randomness looks like.
Can I flip a coin more than 100 times — up to 1,000 or 10,000?
Yes. Type any number from 1 to 10,000 into the flip count box, or tap one of the quick-set chips for 10, 50, 100 or 1,000. Every flip is generated and shown, so a 10,000-flip run gives you the complete sequence, not a summary. Above 240 flips the sequence switches to numbered rows of ten so a long run stays readable and scrollable on a phone.
Can I make a weighted or custom coin flip that isn't 50/50?
Yes. Open the Advanced panel and drag the slider to set the chance of heads anywhere from 1% to 99% — 60/40, 90/10, whatever you need. The tool then flips a coin biased to that weight for the whole run, which is useful for simulating a loaded coin, a lopsided probability, or any yes/no event that isn't an even chance. Leave it at 50 for a normal fair coin.
What's the probability of getting exactly 5 heads in 10 flips?
About 24.6% — 252 of the 1,024 possible ten-flip sequences contain exactly five heads. That's the single most likely outcome, but it still fails to happen three times out of four. Exactly 7 heads is about 11.7%, and all ten coming up heads is roughly 0.1%. Set the flip count to 10 and tap Flip again a few times to watch that spread in practice.
Is this coin flip generator truly random?
Every flip comes from crypto.getRandomValues(), your browser's cryptographically
secure random number generator, seeded by the operating system's entropy pool. That's far
stronger than the Math.random() used by most online coin flippers, and at the
default 50/50 weight the outcome is decided by a single unbiased bit, so the coin is exactly
fair. There's no pattern, no seed you can predict, and no server involved.
Use the free Bulk Coin Flipper →
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