{
  "version": "1.0.0",
  "checked_date": "2026-08-30",
  "rows": [
    {
      "spins": 100,
      "stake_per_spin_usd": 10,
      "total_action_usd": 1000,
      "european_expected_cost_usd": 27.03,
      "american_expected_cost_usd": 52.63,
      "difference_usd": 25.6
    },
    {
      "spins": 500,
      "stake_per_spin_usd": 10,
      "total_action_usd": 5000,
      "european_expected_cost_usd": 135.14,
      "american_expected_cost_usd": 263.16,
      "difference_usd": 128.02
    },
    {
      "spins": 1000,
      "stake_per_spin_usd": 10,
      "total_action_usd": 10000,
      "european_expected_cost_usd": 270.27,
      "american_expected_cost_usd": 526.32,
      "difference_usd": 256.05
    }
  ],
  "method": "total action × standard wheel house edge",
  "source": "https://wizardofodds.com/games/roulette/basics/",
  "limitation": "Expected cost is a long-run average, not a session forecast."
}