Count Unique Pairings Needed for a Round-Robin Event
A round-robin means every participant meets every other participant once. Count unique pairs, divide by the number of match tables running in parallel, and compare the rounds needed with the time you booked.
1 · group | participants | rounds available
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Data note: Everything runs in this browser tab on the pairing-round counter: your group | participants | rounds available stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Perspective: Before: A person is not paired with themself, and each pair is counted once. After: the pairing-round counter shows the working beside each named row so the reader can change the assumption and inspect the consequence.
2 · Read the pairing-round counter
Combinatorial scheduling arithmetic only, not a fairness, safeguarding, tournament-rule or venue-capacity review. Publish an accessible draw, set conduct rules and confirm the event’s format with participants. The result does not generate or validate the actual draw.
Paid layer: pairing-round counter print and history
one-time step · the free reading above stays complete
Free tier
- one complete pairing-round counter run in the app
- three samples plus unlimited article-demo runs
- unwatermarked result text and an explicit, user-triggered state link
What $4 one-time adds
- print the pairing-round counter with its row workings
- CSV of rounds required and row explanations
- last five reading summaries saved in this browser profile
$4 once for repeated filing of the pairing-round counter, not for a better answer. Illustrative time basis: avoiding one five-minute manual reformat per saved reading; no market-price or guaranteed-savings claim.
Local history (this device)
- No saved runs yet — your first run files here.
Checkout is unavailable until a payment link is configured. The optional unlock is browser-local, profile-scoped and best-effort, not server-verified access. Clearing browser data can remove it; there is no account or cross-device recovery.
Boundary and sources
Combinatorial scheduling arithmetic only, not a fairness, safeguarding, tournament-rule or venue-capacity review. Publish an accessible draw, set conduct rules and confirm the event’s format with participants. The result does not generate or validate the actual draw.
- Method: the equation is stated next to the result and uses only quantities entered by the reader.
- All sample records are invented examples. No standard, tariff, product rate, schedule or policy is fetched or represented as verified.
- For any threshold or rule, use the current value from the provider, handbook or qualified professional responsible for it.
Mechanism: competence-autonomy-loop
Optional AI formatting, not calculation
For this pairing-round counter, an external AI text tool may help format non-sensitive notes if you already use one. No AI service or account is required: manual entry completes the same free core calculation. Do not paste private or sensitive data. Review every value against the source before using it.
Format my non-sensitive notes for a pairing-round counter. Return plain rows only: group | participants | rounds available. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: group | participants | rounds available. No AI response is executed as code.