Blackjack House Edge Calculator
Select your game rules to see how they affect the house edge.*
Dealer soft 17 (H17)
Double After Split (DAS)
When Can You Double?
How Many Hands Can a Player Split to?
Re‑split Aces (RSA)
Does the Player Lose Only Their Original Bet When Dealer has a Blackjack? (DBJ)
Late Surrender (LS)
| Single Deck | Double Deck | 4 Decks | 6 Decks | 8 Decks |
|---|---|---|---|---|
| – | – | – | – | – |
*Assumes perfect basic strategy. Negative numbers indicate player edge.
As a professional blackjack player, I’ve spent thousands of hours studying the game. And one thing has always been crystal clear: understanding the house edge is the key to beating blackjack long-term. Over the years, I got tired of using calculators that were either too clunky, lacked important rule options, or didn’t tell the full story.
So, I decided to build my own — a Blackjack House Edge Calculator that’s fast, flexible, and accurate.
Let me show you why this tool matters, how it works, and what makes it better than anything else out there.
What’s the Point of House Edge Calculator Tool?
Most calculators I came across made assumptions I didn’t agree with. Some ignored subtle but important rules. Others didn’t break down how each setting influenced the edge. As a pro, I needed something more precise.
I created this calculator to:
- Calculate the house edge based on real-world rule sets you actually encounter in casinos.
- Give instant, no-nonsense results that help you decide whether to sit down—or walk away.
- Educate new players on how much rules matter.
Whether you’re new to blackjack or you’ve been grinding for years, this tool gives you a serious edge.
What You Can Customize
The power of my calculator lies in how granular it gets. Every rule you tweak changes the house edge, and here’s what you can adjust:
- Dealer Hits or Stands on Soft 17: A small rule with a big impact—my calculator factors that extra 0.2% precisely.
- Double After Split (DAS): Check how much friendlier a game becomes when this is allowed.
- Resplitting Aces: You’ll see how allowing multiple ace splits slightly lowers the edge.
- Late Surrender Options: Select “allowed” or “not allowed.
- Lose Only Original Bet on Dealer BJ: Yes, is favorable. If DBJ is “No,” and you’ve split or doubled, the house sweeps up everything. Brutal.
- Number of Hands: Options are 2, 3, or 4.
- When Can You Double: Any first two cards (best), Only on 9–11, or Only on 10–11.
Every change you make updates the house edge in real time for each deck number, so you immediately see how it affects your odds.
How Blackjack House Edge Calculator Works
This isn’t just a random number generator. The calculator uses actual statistical models built from
- Game theory
- Millions of hand simulations
- Rule-specific edge data backed by blackjack mathematicians
When you select game settings, the calculator adds and subtracts the fractional effects of each rule, showing you the true house edge for that setup. I’ve personally validated the outputs against real casino games I’ve tracked for years.
Why This Calculator Gives You a Real Advantage
Here’s how I use it—and how you should too:
- Table Selection: Before sitting down, I run the rules through the calculator. If the house edge is above 1%, I skip it.
- Expected Loss Calculation: Knowing the edge lets you estimate hourly expected loss.
- Bankroll Planning: If I know the house edge is 0.5%, I can estimate how much I’ll likely lose per hour and set stop-loss limits.
- Training Tool: It’s also great for students I coach. They finally “get” why certain rules matter so much.
It’s not about gambling—it’s about informed decision-making. That’s what separates a player from a guesser.
FAQs
What is a house edge, in simple terms?
The house edge is the mathematical advantage the casino has over the player. It represents the average amount the casino expects to win over time, expressed as a percentage of the player’s bet.
Is this calculator suitable for beginners?
Yes, absolutely. While it’s designed with pro-level detail, the interface is user-friendly. If you know the rules of the blackjack table you’re considering, you can easily plug them in and get a quick result—even without a math background.
How accurate is the calculator?
The calculator is based on verified rule adjustments and tested against real-world outcomes and simulation data. Accuracy is within a fraction of a percent, assuming correct rule inputs and basic strategy use.
Do I need to know basic strategy to use this tool?
No—but the house edge calculated assumes that you’re playing with perfect basic strategy. If you don’t, your real edge will be worse. If you’re not familiar with basic strategy, consider using the calculator alongside a strategy chart.
Can I use this calculator on mobile devices?
Yes, the calculator is fully responsive and optimized for both desktop and mobile use, so you can check house edges right at the table or before joining a game online.
Does this tool account for side bets?
No. Side bets are not currently included because they often have vastly different (and higher) house edges that distort the core blackjack calculation. Stick to evaluating standard blackjack rules for now.
Is this calculator applicable to live casino games?
Yes. As long as you know the specific rules of the live dealer table (number of decks, payouts, etc.), you can get an accurate house edge reading using this tool.
Can I use this to track changes in house edge as rules vary?
Absolutely. That’s one of the best uses of the tool. You can tweak one rule at a time—like changing the number of decks or doubling restrictions—and immediately see how much it affects the house edge.
