THE NUMBERS, EXPLAINED
How to use this tool.
Each flip uses one bit from the browser’s cryptographic random generator. Heads and tails are equally likely on each independent flip. A short sequence need not contain equal counts.
Start with your inputs
Press Flip coin to get heads or tails. The session tally records completed flips until you reset or reload.
A worked example
Press the action button to generate a new random result. A future draw is not predetermined.
How this is calculated
Selection method
Draw a uniformly distributed index from two outcomes using the browser’s cryptographic random generator: index 0 is Heads, index 1 is Tails. Update the session tally only when a flip completes.
Assumptions and limits
Each flip uses one bit from the browser’s cryptographic random generator. Heads and tails are equally likely on each independent flip. A short sequence need not contain equal counts.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
A newly generated selection. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Each flip uses one bit from the browser’s cryptographic random generator. Heads and tails are equally likely on each independent flip. A short sequence need not contain equal counts.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →