Mega Millions Odds Explained: Chances of Winning Every Prize Tier (2026)

Mega Millions is one of two national lottery games sold in 45 states, Washington D.C., and the U.S. Virgin Islands. Understanding how its odds are calculated — and what each prize tier realistically means — helps players make informed decisions about whether and how to play.

How Mega Millions Odds Are Calculated

Mega Millions uses a dual-drum format: five main balls drawn from a pool of 1–70, and one Mega Ball drawn from a separate pool of 1–25. The total number of possible combinations is:

Each of the 302,575,350 combinations is equally likely. There is no pattern, no hot numbers, and no timing strategy that changes this fundamental probability. Every $2 ticket represents one of these combinations.

Lower prize tiers are calculated using the same combinatorial math, counting all the ways to match partial sets of numbers. For example, the odds of matching exactly 4 main numbers without the Mega Ball:

• Ways to match 4 of 5 drawn main numbers: C(5,4) = 5
• Ways to pick 1 non-drawn number from remaining 65: C(65,1) = 65
• Ways to miss the Mega Ball: 24 (out of 25 Mega Balls, all except the correct one)
• Total favorable combinations: 5 × 65 × 24 = 7,800
• Probability: 7,800 / 302,575,350 ≈ 1 in 38,792

This methodology applies to all prize tier calculations — the numbers in the official odds table are derived from this combinatorial framework, not estimated.

Mega Millions vs. Powerball Odds: Side-by-Side

Mega Millions and Powerball are the two dominant national lottery games. Their jackpot odds are nearly identical, but their structures differ in meaningful ways:

Powerball's jackpot odds are marginally better than Mega Millions (292M vs. 303M), but the practical difference is negligible. Both games offer the same $1 million second prize for matching 5 main numbers without the bonus ball. Powerball's Power Play can multiply the second prize up to 2x (capped at $2 million with 10x Power Play), while Mega Millions' Megaplier applies fully to the $1 million second prize.

For a detailed comparison, see our Powerball vs. Mega Millions breakdown.

What Does Megaplier Do?

Megaplier is an optional add-on purchased at the time of your ticket for an additional $1, bringing your total ticket cost to $3. Before each drawing, a separate Megaplier number (2, 3, 4, or 5) is drawn. If you have Megaplier and win a non-jackpot prize, your prize is multiplied by that night's Megaplier value.

Key Megaplier facts:

• Does not affect jackpot odds or jackpot amount. Megaplier only applies to the 8 non-jackpot prize tiers.
• The $1,000,000 second prize becomes $2,000,000–$5,000,000with Megaplier, depending on the night's draw (capped at 5x since the game reform in 2017).
• Megaplier distribution: The 2x multiplier appears most frequently (15 out of 35 balls), followed by 3x (9/35), 4x (3/35), and 5x (1/35). The expected Megaplier value is approximately 2.83x.
• Is Megaplier worth it?For a $2 ticket, you spend 50% more for a 2.83x expected multiplier on non-jackpot prizes. At small prize tiers ($2–$10), the multiplier matters little in absolute terms. The value case is strongest when you're likely to win second-tier prizes — but those odds are 1 in 12.6 million regardless.

Historical Mega Millions Jackpot Facts

Understanding how Mega Millions jackpots behave historically helps set realistic expectations about jackpot sizes and timeframes:

• Largest jackpot: $1.602 billion (August 8, 2023 — single winning ticket, Florida). The lump sum cash value was approximately $794.2 million before taxes.
• Second largest: $1.537 billion (October 23, 2018 — single winning ticket, South Carolina). Winner chose to remain anonymous through a trust.
• Average jackpot size at time of win: Historically around $250–$350 million, though this figure has trended higher as jackpots roll over more frequently due to the increased odds introduced in the 2017 matrix change.
• Time between jackpot wins: After the 2017 format change (which increased the pool from 5/75+1/15 to 5/70+1/25 and dramatically improved jackpot odds), draws can go 20–40+ drawings without a jackpot winner, building to very large amounts before being hit.
• Minimum starting jackpot: $20 million, which increases by at least $2 million per drawing when it rolls over, though actual increases depend on ticket sales volume.

What the Odds Mean in Practical Terms

Numbers like 1 in 302 million are difficult to internalize. Here are some comparisons that help put Mega Millions jackpot odds in perspective:

• You are roughly 29,000 times more likely to be struck by lightning in a given year than to win the Mega Millions jackpot with a single ticket.
• If you bought one ticket per drawing (twice per week), you would need to play for an average of approximately 2.9 million years before winning the jackpot.
• At 302 million tickets, if every American (330 million people) bought one ticket, there would be a roughly 63% chance that someone wins — and a 37% chance no one wins.
• However, the 1 in 24 overall odds mean that matching the Mega Ball alone ($2 prize) or getting a low-tier match is a fairly regular experience — roughly one out of every 24 tickets wins something.

Ready to explore jackpot tax implications? Our Mega Millions jackpot taxes calculator shows exactly how much you would keep after federal and state withholding. And for the lump sum vs. annuity decision, our lump sum vs. annuity guide covers the math in full.

Mega Millions odds are fixed by game rules and verified by independent auditors. All probability figures on this page are derived from official game format specifications. Past jackpot results do not affect future draws. Please play responsibly. Problem gambling helpline: 1-800-522-4700 (24/7).