Duel Keno Calculator

Run the Calculator

Tap numbers on the board to set your picks (up to 10). Then enter the current multiplier for each possible hit result. The Duel Keno calculator updates the exact and hit-or-better probabilities, payout, net profit and estimated RTP from the values you enter.

Live-Verified Native Return

The four Duel Keno risk presets were captured directly from the live game interface on 26 June 2026 and recomputed with the same hypergeometric engine this page runs. The full paytable was recorded for every pick total from 1 to 10 across all four modes, so the tool loads the matching verified table whenever you change the number of picks or the risk mode.

The table below shows the native Duel Keno house edge for each combination. RTP is simply 100% minus the edge, so every cell here means a native return between about 99.79% and 100%. The gold figure marks the cheapest mode for that number of picks.

House edge in %, lower is better. Gold marks the lowest edge in each row. Pick 1 is zero in every mode.

Two things stand out. First, the edge is not constant: it sits at exactly zero for a single pick in every mode, then moves between roughly 0.01% and 0.21% as the number of picks rises. Second, no single setting is always best. Low is the cheapest option at ten picks (0.013%) yet the most expensive on average across the full range of picks (about 0.098%); Medium carries the lowest average edge (about 0.068%); and the cheapest column switches several times as you read down. A blanket claim that one mode is simply "better" does not survive the actual table.

Each figure describes the paytable alone. The advertised "Zero Edge" or 100% return is a separate rakeback layer paid on top, within a daily allowance — it is not a property of the multipliers, and it closes the small native gap only inside those limits.

Verify before relying on any figure: live tables can change without notice. Reselect the picks or risk mode in the tool to reload the captured values, or switch to manual entry to test your own table.

How to Use the Tool

Start by tapping numbers on the board to set your picks, up to 10. Then enter the current multiplier for each possible hit result from the live Duel Keno interface. The calculator uses those values to estimate the return profile of the entered table.

If you only want to check one result, set your picks, choose a hit count and enter the multiplier for that row. If you want to audit return, fill every payout row. A partial table can still help for checking one outcome, but it should not be treated as a complete RTP estimate.

Exact Hit Probability

The calculator uses a hypergeometric model. In plain terms, it asks how many ways your selected numbers can appear in the drawn numbers, then divides that by the total number of possible draws from the 40-number pool.

The formula used here is: P(h hits) = C(picks, h) × C(40 − picks, drawn − h) / C(40, drawn). With 10 drawn that keeps the calculator tied to the 40-number, 10-draw model instead of copying probability tables from traditional 80-number Keno.

Hit-or-Better Probability

Hit-or-better probability adds together the chance of the selected match count and every better result. With 10 picks, for example, the chance of at least 7 hits includes the 7/10, 8/10, 9/10 and 10/10 outcomes.

This number is often more useful than exact-hit probability when reading a paytable. Some games pay across several upper match counts, so the practical chance of receiving a meaningful payout can be broader than a single exact result.

Payout and Net Profit

Total payout is calculated as stake × multiplier. Net profit is total payout minus the original stake. If the multiplier is 0, the calculator treats the result as a full loss of the entered stake.

This distinction matters because many casino interfaces show gross payout rather than net gain. A 1.5x return on a 1-unit stake pays 1.5 units in total, but the net profit is only 0.5 units.

Editable Paytable Audit

The paytable is editable by design. Duel can market a return claim, and other sites can repeat old or incomplete numbers, but the only safe Duel Keno audit is based on the multipliers visible in the current game interface.

For each row, the calculator multiplies exact probability by the entered multiplier. The sum of all those rows becomes the estimated RTP for the chosen pick count. This lets you test the table instead of relying on a flat marketing statement.

Estimated RTP From the Full Paytable

Estimated RTP = Σ P(hits) × payout multiplier. If every payout row is entered correctly, this gives the expected gross return per unit staked, before any extra allowance, rakeback, promotion or account-specific condition is taken into account.

If some multipliers are missing, the RTP result will be understated or incomplete. Use it as a calculator output, not as a claim about the live game, unless the entire paytable has been checked.

Why RTP Claims Need Context

A "100% RTP" or "Zero Edge" statement should be read as a condition to verify, not as a substitute for paytable math. Keno return depends on the relationship between probability and multipliers. If the table changes, the expected return changes with it.

Provably fair verification is a separate concept. It can confirm how a result was generated, but it does not prove that the paytable is favorable. Fair randomness and favorable pricing are related topics, not the same thing.