A traditional slot may display the same number of rows and paylines during every round. Megaways slots are visually different because the size of the grid can change whenever the reels spin.

One round may offer a few hundred possible combinations, while another may provide tens of thousands.

This article presents Megaways slots explained through practical calculations. It shows how reel heights create win ways, how matching symbols form combinations, and why the number displayed above the reels changes so frequently.

Megaways was created by Big Time Gaming and became an influential slot mechanic after appearing in Bonanza. Evolution states that the system can place between two and seven symbols on each reel and create as many as 117,649 possible winning routes in a six-reel layout.

Although a larger grid creates more potential combinations, it does not promise a win. Symbol probabilities, payouts, RTP, and volatility remain controlled by the individual game’s mathematical model.

Why the Grid Changes on Every Spin

In a normal fixed-reel slot, the grid may remain at five reels and three rows. Megaways uses a random reel modifier that selects how many symbol positions are active on each reel.

For example, the first reel might display two positions while the second shows six. The third reel could contain five, and the remaining reels may use completely different heights.

This arrangement is recalculated on the next spin. The changing layout is therefore a core game mechanic rather than a special feature that activates only occasionally.

Some titles present the active ways count clearly above the grid, allowing players to see how the current reel sizes affect the number of potential combinations.

The Formula Behind Ways to Win

The number of Megaways is normally calculated by multiplying the active positions on all main reels. Imagine a six-reel spin with the following heights:

2 × 3 × 4 × 5 × 6 × 7 = 5,040 ways

If the next round produces six reels with seven active positions, the calculation becomes:

7⁶ = 117,649 ways

The maximum figure of 117,649 is closely associated with Megaways, but not every licensed game uses the exact same structure. Developers may create layouts with fewer reels, additional positions, cluster systems, or alternative maximums.

The displayed figure should therefore be treated as a description of the current grid – not as a probability that a win will occur.

How Winning Combinations Are Formed

Most Megaways games pay for matching symbols appearing on consecutive reels from left to right. Their vertical positions usually do not need to follow a fixed line.

Suppose a particular symbol appears twice on reel one, three times on reel two, and once on reel three. If three adjacent reels create a valid payout, those symbols can form:

2 × 3 × 1 = 6 winning combinations

Additional matching symbols on later reels can extend the combination and improve the payout. However, exact requirements depend on the game’s paytable.

Scatters and special bonus symbols often operate independently of the ways system. They may pay anywhere on the grid or activate a feature without starting on the first reel.

What the Extra Horizontal Reel Does

Several well-known Megaways games place a horizontal reel above reels two through five. Each symbol on this extra reel adds another active position to the corresponding main reel below it.

This helps explain how a game can reach seven effective symbols on its central reels even when the visible vertical sections initially appear smaller.

Big Time Gaming describes this structure in titles such as Bonanza Falls, where each cart on the horizontal reel adds a symbol to reels two, three, four, and five.

The extra reel may also contain scatters, wilds, or other special icons. Its exact role depends on the individual title.

How Cascades Extend a Single Spin

When a winning way appears, many Megaways games remove the symbols involved and replace them with new ones. This process may be called a cascade, reaction, tumble, or avalanche.

The replacement symbols can create another combination while the original wager remains active. If another win forms, the process repeats until the new arrangement does not produce a payout.

In Fireworks Megaways, for example, winning reactions cascade symbols onto the grid, while specific positions on the extra reel can transform qualifying firework icons into wilds.

Cascading reels offer additional result sequences, but they do not ensure that a second or third combination will occur.

How Multipliers Affect Cascading Wins

Multipliers are frequently connected to reaction sequences. A game may begin at 1× and increase the multiplier after each consecutive cascade.

Some titles reset the multiplier when the sequence ends. Others preserve or increase it during free spins, allowing longer chains to produce larger calculated payouts.

Bonanza Falls combines its Megaways layout with free spins, bonus coins, symbol multipliers, wild multipliers, and increases to the free-spin multiplier.

Because multiplier rules vary, players should confirm whether the value applies to the current cascade, every win in the sequence, selected symbols, or the entire bonus round.

Why More Ways Do Not Mean Better RTP

It is tempting to assume that 117,649 ways must provide better value than 1,000 ways. However, the number of combinations is only one element of the game’s design.

The developer can balance a larger number of possible routes through symbol frequency, prize amounts, bonus chances, and other mathematical settings. A game with more ways can therefore have a lower, equal, or higher theoretical RTP than another title.

Regulatory guidance defines theoretical RTP as the designed percentage returned across extensive turnover. Volatility must also be considered because it affects how widely short-term outcomes can differ from the theoretical figure.

Always check the RTP shown inside the exact game version because the same title may sometimes be supplied with different configurations.

Megaways slots create their changing win counts by multiplying the number of active positions on each reel. When all six reels show seven symbols, the familiar maximum is 117,649 potential ways to win.

Matching symbols generally connect across adjacent reels from the left, while horizontal reels may add extra positions to the main grid. Cascades can then replace winning symbols and generate further combinations from one wager, sometimes with increasing multipliers.

These features make the format visually active, but they do not guarantee better returns. Before playing, inspect the paytable, current RTP, volatility, symbol rules, and bonus mechanics.

Set a fixed entertainment budget and never increase spending simply because a high number of ways appears on the screen.