What’s the 411 on RNG vs. RTP?

Home » Recent Posts » What’s the 411 on RNG vs. RTP?
Share this on:

97 percent payback slot machine

Slot machines have various acronyms to define various aspects of its design, and one player wonders how two elements interact with each other:

How do RNGs and RTPs affect one another?

Stacy F.

First, let’s review each of these acronyms and what they mean:

  • The Random Number Generator (RNG) is how a slot’s outcome is determined – the number(s) (one or more is used depending on the design of a slot) that is active at the millisecond that you press the spin button determines what the spin’s outcome will be.
  • Return to Player (RTP), also known as payback percentage, is what a game is expected to return to a player in terms of payouts as a percentage of the overall wagers, over the long term. Slots tend to be designed with around a half dozen choices for casinos to select within a range of 85-98 percent, and casinos will select the one they wish to use for their floor.

So how do they affect one another? The RNG is working within a range of outcomes. The totality of all outcomes is what determines the RTP. 

To offer a very simple example, if you had a million outcomes, and each one cost $1 to get, and you won $900,000 on those wagers, you’d have an RTP of 90 percent. That’s how the RTP is determined for a given game.

Because each outcome has an equal chance of coming up on the RNG, over time, after millions of spins, it’s expected that each outcome will come out roughly the same number of times. 

So, the RNG being random within that range is how the RTP is achieved over time. And that’s how they affect one another. While they’re different parts of a slot machine’s design, they both have a key role in achieving what’s supposed to happen over time with a game, ensuring the casino makes money and the player gets paid back on their spins what they should as well.

Have a question? Submit yours here!

Share this on:

Leave a Comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Play Online Casinos

Sign Up with BetMGM Casino and get a Deposit Match up to $1,000, plus $25 in Site Credits on the house! Available in MI, NJ, PA & WV. US promotional offers not valid in Ontario.

Use code SWITCH2500 for a 100% deposit match up to $2,500, and 2,500 Reward Credits, with $25+ in wagers placed (MI, NJ, PA & WV).

New sign-ups with DraftKings Casino in MI, NJ, PA & WV will receive $35 Casino Credits, plus Play $5 and Get $50 Back in Casino Credits Instantly!

Sign Up and deposit $10+ at FanDuel to get a Welcome Offer of a $20 Bonus + Up to $1,000 Play it Again based on your net losses in the first 24 hours in MI, NJ, PA & WV!

Play Social Casinos

Ready to give Show Me Vegas Slots a try? Get 10 million coins to play Show Me Vegas Slots with promo code SWITCH!

New players to 88 Fortunes Slots receive 5 billion coins as a thank you for signing up!

Sign Up and get a Welcome Bonus of 2,000,000 FREE Gold Coins & 2 FREE Sweeps Coins. Get started today!

Sign Up for LuckyLand Slots and get a Welcome Bonus of 7,777 FREE Gold Coins & 10 FREE Sweeps Coins!

Online Game Spotlight
Double Patriot

Classic Everi Three-Reel Slot with a Fresh Twist

Play Online Sportsbooks

Sign Up to get a Bet $5, Get $150 in Bonus Bets if your bet wins!

Use code SWITCH1000 to get your first bet back in Bonus Bets, up to $1,000, if you lose.

​SIGN UP to get $150 instantly in Bonus Bets* (NC, $5+ bet required) or up to $1500 in Bonus Bets* Back if Your First Bet Doesn't Win (All Other Eligible States)!

New Players get a $1,500 No Sweat Bet, a $50 Bonus Bet with $5 deposit, & Get a No Sweat NBA SGP Every Day of NBA Playoffs! New players outside MA also get 20% Match up to $1,000 (25x PTR).

Social Game Spotlight
Kronos Unleashed Slot

Frequent Feature Livens Up Super Tall Reels

Dragons vs. Pandas Slot Machine

Two Sets of Reels Battle it Out