Blackjack House Edge Calculator – Price Any Table’s Rules (Free)

How to Use the House Edge Calculator

Set each rule to match the table you’re evaluating — you’ll find them printed on the felt or placard at a live table, or in the info screen of any online game. The percentage at the top updates with every change.

The asterisked defaults represent the most common setup you’ll meet: a six-deck game with resplitting to four hands — the standard Vegas-strip configuration.

What Is the House Edge in Blackjack?

The house edge is the casino’s long-term mathematical advantage, expressed as a percentage of each original bet. An edge of 0.5% means you lose about $0.50 per $100 wagered, averaged over thousands of hands.

You’ll also see the flip-side term: RTP (return to player). A 99.5% RTP and a 0.5% house edge are the same statement — one counts what the casino keeps, the other what it pays back.

One thing the edge is not: a prediction for tonight. Any single session can swing far above or below it — the edge only asserts itself over the long run.

How Each Rule Changes the House Edge

Every toggle in the calculator maps to a real rule with a measurable price. Here’s what each one is worth, and what to look for on the felt.

Number of Decks (1 to 8)

Fewer decks mean a lower house edge — going from eight decks down to one is worth roughly 0.5%, with everything else equal. Fewer decks make naturals slightly more frequent and doubles slightly stronger.

The warning: casinos know “single deck” sounds player-friendly and often pair it with a 6:5 payout that wipes out the benefit several times over — see the single-deck trap example below.

Dealer Soft 17: S17 vs H17

A soft 17 is a 17 containing an ace counted as 11 (like Ace-6). At S17 tables the dealer stands on it; at H17 tables the dealer hits — and that extra draw costs you about 0.2%.

What to look for: the rule is printed right on the felt — “Dealer must stand on all 17s” (good) versus “Dealer hits soft 17” (worse).

Blackjack Payout: 3:2 vs 6:5

The payout line is the single worst rule in the game: dropping from 3:2 to 6:5 adds roughly 1.4% to the house edge — more than every other bad rule on this page combined.

No other toggle in the calculator moves the number as far. See what it costs in actual dollars per hand with our Payout Calculator.

Doubling and Double After Split

The freedom to double matters. Being restricted to doubling on 10–11 only instead of any first two cards costs about 0.18%; a 9–11 restriction costs about 0.09%.

Double after split (DAS) — being allowed to double a hand you’ve just split — is worth about 0.14% to the player. Good tables offer both freedoms; the calculator lets you price each separately.

Resplitting and Splitting Aces

Each extra splitting freedom shaves a little more off the edge: resplitting to four hands rather than two is worth a few hundredths of a percent, resplitting aces about 0.08%, and being allowed to hit split aces about 0.19%.

Individually small, these rules add up — and they’re the ones most often missing from otherwise decent-looking tables.

Surrender

Late surrender — giving up half your bet after the dealer checks for blackjack — saves about 0.08% when used correctly on hopeless hands like hard 16 against a 10.

It’s a rare rule, but a free discount where offered. If the calculator shows “Late” as an option for your table, take the edge reduction — and learn the correct surrender hands on our basic strategy page.

Real-World Examples: Pricing Three Typical Tables

Run these three rule sets through the calculator and watch the number move.

Example 1: The High-Limit Game (Great Odds)
Six decks, S17, double on any two, DAS, late surrender, 3:2 — the classic premium setup. The edge lands around 0.3%, among the best odds in any casino.
Takeaway: good rules cluster at higher-minimum tables, because informed players demand them.
Example 2: The Party-Pit Trap (Terrible Odds)
Eight decks, H17, no DAS, blackjack pays 6:5 — the fun-first table with music and low minimums. The edge lands around 2%, roughly six times the high-limit game.
Takeaway: the cheap seat is the expensive one. A $10 bet here costs more per hand, in expectation, than a $25 bet at Example 1.
Example 3: The Single-Deck Trap
One deck — but blackjack pays 6:5. The single deck gives you back about 0.5%; the 6:5 payout takes away about 1.4%. Net result: noticeably worse than a good six-deck 3:2 game.
Takeaway: never judge a table by deck count alone. The payout line always has the final word.

What Counts as a Good House Edge?

A good blackjack house edge is under 0.5% — achievable at 3:2 tables with decent rules and perfect basic strategy. Between 0.5–1% is acceptable; above 1% is avoidable; 2%+ means bad rules, bad play, or both.

At the extreme, a few rare rule combinations — single deck, S17, double any two, 3:2 — can push the edge fractionally player-positive. That’s precisely why you’ll almost never find that table: casinos price their rules as carefully as you should.

What the Edge Costs You Per Hour

Percentages feel abstract; money doesn’t. The formula: hands per hour × average bet × house edge = expected cost per hour.

At a typical 70 hands per hour with $25 bets: a 0.5% table costs about $8.75/hour — cheaper than most entertainment. The same bets at a 2% party-pit table cost about $35/hour, four times the price for the same game.

Make it your own bankroll rule: pick the rules before you pick the seat. Ten seconds reading the felt is the best hourly rate in the casino.

The Edge Assumes You Play Perfect Basic Strategy

Every figure this calculator shows assumes optimal play. Play by intuition and you add 1–2% on top of whatever the rules cost — turning the best table in the house into a worse deal than the party pit played well.

Closing that gap is free: look up any hand with our Strategy Calculator and memorize the basic strategy chart. The only mathematically proven way to push beyond basic strategy is card counting — drill it with our Card Counting Trainer and Deviation Chart.

Put It Into Practice

Flip the Dealer Hits Soft 17 rule in our free blackjack game and feel a real edge difference across a session.
See what 6:5 costs in dollars on your actual bet size with the Payout Calculator.
Check any hand’s correct play with the Strategy Calculator.

How We Calculate the House Edge

The figures come from established combinatorial analysis of blackjack rules — the same published mathematics that has priced every rule variation since the 1950s — cross-checked against accepted reference values. Estimates are rounded, and minor interactions between rules can shift results by hundredths of a percent.

The tool is free and donation-supported: no casino advertising, no bonus codes, no course upsells. Just the price tag the casino doesn’t print.

Conclusion: Read the Rules Before You Bet

The hierarchy is clear: the payout line matters most, then deck count and the soft-17 rule, then doubling and splitting freedoms. Price every table with the calculator before you sit — the spread between the best and worst table in one casino is bigger than most players imagine.

And remember the fine print: these numbers only hold if you play basic strategy. Practice free first, set your limits before you bet real money, and enjoy the game responsibly (18+, or 21+ in many jurisdictions).

House Edge FAQs

What is RTP in blackjack?

RTP (return to player) is the flip-side of the house edge: a 0.5% edge equals a 99.5% RTP. Both describe the same long-term math.

Which rule has the biggest impact on the house edge?

The blackjack payout — 6:5 instead of 3:2 adds roughly 1.4%, more than every other common rule change combined.

Does basic strategy eliminate the house edge?

No — it reduces the edge to its minimum for the rules, typically around 0.5%. Playing by intuition adds 1–2% on top.

Can the player ever have an edge over the casino?

Rarely — a few generous rule sets go fractionally player-positive with perfect play, and card counting can create an edge. Casinos offer neither willingly.

Is single-deck blackjack always better?

No — single deck is only worth about 0.5%, and most single-deck games pay 6:5, which costs 1.4%. Check the payout first.

Do online blackjack games have a lower house edge?

Often, yes — many online tables use good rules with edges around 0.5%, but rule sets vary by game, so run each one through the calculator.

How is house edge different from what I lose in one session?

The edge is a long-run average; single sessions swing far above and below it. Expect variance, and never treat the average as a nightly guarantee.