Mega Millions Odds

Mega Millions requires matching 5 white balls (from 1-70) plus 1 Mega Ball (from 1-25). With more white balls than Powerball, the jackpot odds are even steeper. The Mega Millions odds calculator shows all 9 prize tiers with exact step-by-step combinatorial math.

The Math

Your chance of winning the Mega Millions jackpot is 1 in 302,575,350. You are roughly 25,000 times more likely to roll a Yahtzee (five of a kind) on your first try than to win the Mega Millions jackpot. The mega millions odds calculator expresses this probability as both a fraction (1/302,575,350) and a percentage (0.00000033%).

All Prize Tiers

Mega Millions offers 9 ways to win. The math follows the same pattern as Powerball — combinations of white ball matches combined with hitting or missing the Mega Ball:

The smallest prize is $2 for matching just the Mega Ball (0 white balls + Mega Ball), with odds of 1 in 37. Overall odds of winning any prize are about 1 in 24. The $1 million second prize (5 white balls, no Mega Ball) has odds of 1 in 12,607,306. Our lottery probability calculator shows every tier's exact odds and prize amounts.

Megaplier and Prize Enhancement

The Megaplier multiplies non-jackpot prizes by 2×, 3×, 4×, or 5×. Like Powerball's Power Play, it costs an extra $1 per play and doesn't affect winning probability. The Megaplier is randomly drawn before each drawing from a weighted pool of possibilities. A 5× Megaplier turns the $1 million second prize into $5 million.

Mega Millions vs Powerball

While Mega Millions has slightly worse jackpot odds (1 in 302M vs Powerball's 1 in 292M), the difference is negligible for practical purposes — both are extraordinarily unlikely. Mega Millions starts its jackpot at $40 million (vs Powerball's $20 million) and has historically produced larger record jackpots. The Mega Millions odds calculator and powerball probability calculator let you compare both games' complete prize structures.

Common Mistakes

• Comparing Powerball and Mega Millions odds: Mega Millions has slightly worse jackpot odds (302M vs 292M) due to the larger white ball pool (70 vs 69).
• Misunderstanding annuity vs cash: The advertised jackpot is the annuity value (30 payments). The cash option is roughly half that amount.
• Confusing Megaplier with additional entries: The Megaplier only multiplies existing prizes — it doesn't give you additional chances to win.

Mega Millions has the toughest jackpot odds of any major US lottery at 1 in 302,575,350. With 70 white balls (vs Powerball's 69), every additional ball dramatically increases the total combinations. The formula C(70,5) × C(25,1) = 12,103,014 × 25 = 302,575,350 shows how the white ball and Mega Ball pools combine to create the massive odds.

Despite the long jackpot odds, Mega Millions offers competitive odds for smaller prizes. Matching the Mega Ball alone (0 white balls + Mega Ball) wins $2 with odds of 1 in 37. Overall odds of winning any prize are about 1 in 24, similar to Powerball. The Megaplier option multiplies non-jackpot prizes by up to 5x, making the $1 million second prize even more valuable.

Understanding these odds helps players make realistic decisions about lottery participation. Our calculator shows all 9 prize tiers with the exact number of ways to win each tier, the odds in 1 in X format, and the probability. The complete mathematical derivation including C(5,m) × C(65,5-m) calculations is shown step by step.