Deterministic wheel math for American and European layouts, including the American first-five exception.
Ship exact per-bet probability, expected value, and house-edge tables for every common inside and outside bet.
Rules focusThe rule assumptions and model boundary this page uses for its calculations.
Standard table bets are modeled as covered pockets plus a payout multiplier. Wheel size does the rest.
OutputsThe main numbers or result groups this page will produce after you run the analysis.
Win probabilityLoss probabilityEV per unitHouse edge
Build a full layout bet, edit individual stake sizes, and see the combined positive-outcome rate instead of a single generic bet family.
Rules
Wheel math
Every roulette wager is just a set of covered pockets and a posted payout. The wheel size determines the rest.
Standard bets sit on a 37-pocket wheel, dropping the normal house edge to 2.70%.
European wheels use 37 pockets and keep the standard layout payouts.
American wheels add 00, which raises the base edge on most wagers to 5.26%.
The American 0-00-1-2-3 top line remains a separate outlier with a worse edge than the rest of the layout.
Reference
Single-bet odds table
This stays as the quick reference view. The analyzer below is where multiple simultaneous bets get merged into one exact profile.
How to read EV and net resultEV per unit is the average profit or loss on a 1-unit bet over many spins. In the merged layout analyzer below, net result means the realized profit on a specific landing pocket after subtracting every losing chip and paying each winning bet at payout-to-1 odds.
Bet
Payout
Win rate
EV / unit
House edge
Straight upA single number.
35:1
2.70%
-0.027u
2.70%
SplitTwo adjacent numbers.
17:1
5.41%
-0.027u
2.70%
StreetThree numbers in a row.
11:1
8.11%
-0.027u
2.70%
CornerFour numbers sharing a corner.
8:1
10.81%
-0.027u
2.70%
Six lineTwo adjacent streets.
5:1
16.22%
-0.027u
2.70%
Dozen / columnAny 12-number outside grouping.
2:1
32.43%
-0.027u
2.70%
Even-money outsideRed/black, odd/even, or high/low.
1:1
48.65%
-0.027u
2.70%
Analyzer
Build a full roulette layout wager
Use the printed board itself to place chips on straight-ups, splits, corners, streets, six-lines, and outside bets, then fine-tune stake sizes in the active list.
Click directly on the printed board to drop a 1u chip. Hover reveals the active hit area, right click removes a chip, and exact stake sizes can still be edited in the active bets list below.
Total stake0.00u0 active bet(s)
Positive outcome rate0.00%Any hit: 0.00%
EV / unit0.000uExpected net: 0.000u
House edge0.00%Push rate: 0.00%
Start by clicking a number or adding a common layout bet.