Coin Toss Generator
Flip a virtual coin for a true 50/50 Heads or Tails result — single flip or batch simulator.
Written by Anil Gautam · Updated
How does the virtual coin pick heads or tails?
Each toss takes one random byte from the browser's cryptographic random number generator, the source browsers provide for security work such as creating keys. A byte has 256 possible values. The tool calls 0 to 127 Heads and 128 to 255 Tails, so each side owns exactly 128 values and neither gets an edge from rounding. Everything happens on your device, and every toss is independent: five Heads in a row do not make Tails more likely on the sixth.
How close to 50/50 should many tosses be?
Equal odds on each toss still leave plenty of room for uneven totals. Over 100 tosses the chance of exactly 50 Heads is only about 8 percent, while a count somewhere between 40 and 60 turns up about 96 percent of the time. With 1,000 tosses, exactly 500 Heads happens about 2.5 percent of the time. Streaks are normal too: in 100 tosses, the chance of seeing at least six identical results in a row is about 81 percent.
To watch the counts settle toward half and half, set the number to 1,000 and toss a few times. In about 97 percent of 1,000-toss sessions the summary shows Heads between 47 and 53 percent. Streaks also grow with more tosses: a run of 10 or more identical results appears in about 62 percent of those sessions.
How do you read the toss summary and history?
Each click on a toss button replaces the previous session. Toss once clears the history, sets the number box back to 1 and shows a single result. The other button, labeled with the current count, tosses whatever number is in the box, from 1 to 1,000; a blank or zero counts as 1 and anything above 1,000 is capped. On the big coin you see the last toss of the batch, orange for Heads and dark for Tails. The history numbers every toss from 001, and Clear empties it.
Percentages are rounded to whole numbers, so the two figures can add up to 101. With 505 Heads in 1,000 tosses, the summary shows 51 percent Heads and 50 percent Tails, because 50.5 and 49.5 both round up. For a best-of-three call, set the number to 3: one side always wins at least two, so there is no tie to break. When there are more than two options, the Dice Roller, Random Name Picker or Wheel Spinner fit better, and the Random Number Generator covers any numeric range.