Blackjack Basic Strategy Calculator

Interactive basic strategy chart, hand decision simulator, and Hi-Lo card counting trainer for mathematical education.

Example Hand

Player

A♠

♠

A♠

6♥

♥

6♥

17Soft

Dealer

9♦

♦

9♦

Optimal Action

↑HitRecommended

Soft 17 vs dealer 9: Hit to improve your hand. You can't bust on the next card.

House Edge:~0.5% with basic strategy

Ruleset:

Basic Strategy Chart

This chart shows the optimal decision for every possible hand against each dealer upcard. The strategy varies slightly based on the selected ruleset.

HHit - Take another card

SStand - Keep current hand

DDouble - Double bet, take one card

PSplit - Split pair into two hands

RSurrender - Forfeit half bet

Hard Totals

Player Hand	2	3	4	5	6	7	8	9	10	A
Hard 8	H	H	H	H	H	H	H	H	H	H
Hard 9	H	D	D	D	D	H	H	H	H	H
Hard 10	D	D	D	D	D	D	D	D	H	H
Hard 11	D	D	D	D	D	D	D	D	D	D
Hard 12	H	H	S	S	S	H	H	H	H	H
Hard 13	S	S	S	S	S	H	H	H	H	H
Hard 14	S	S	S	S	S	H	H	H	H	H
Hard 15	S	S	S	S	S	H	H	H	R	H
Hard 16	S	S	S	S	S	H	H	R	R	R
Hard 17	S	S	S	S	S	S	S	S	S	S

Soft Totals

Player Hand	2	3	4	5	6	7	8	9	10	A
A,2	H	H	H	D	D	H	H	H	H	H
A,3	H	H	H	D	D	H	H	H	H	H
A,4	H	H	H	D	D	H	H	H	H	H
A,5	H	H	H	D	D	H	H	H	H	H
A,6	H	D	D	D	D	H	H	H	H	H
A,7	D	D	D	D	D	S	S	H	H	H

Pairs

Player Hand	2	3	4	5	6	7	8	9	10	A
2,2	P	P	P	P	P	P	H	H	H	H
3,3	P	P	P	P	P	P	H	H	H	H
4,4	H	H	H	P	P	H	H	H	H	H
5,5	D	D	D	D	D	D	D	D	H	H
6,6	P	P	P	P	P	H	H	H	H	H
7,7	P	P	P	P	P	P	H	H	H	H
8,8	P	P	P	P	P	P	P	P	P	P
9,9	P	P	P	P	P	S	P	P	S	S
10,10	S	S	S	S	S	S	S	S	S	S
A,A	P	P	P	P	P	P	P	P	P	P

Key Probabilities

Natural Blackjack

4.83%

About 1 in every 21 hands

Dealer Busts

~28.4%

Higher vs dealer 4, 5, 6

10-Value Next Card

30.8%

16 of 52 cards are worth 10

House Edge with Basic Strategy

Using the strategy chart above reduces the house edge to approximately 0.5% under favorable rules. Without basic strategy, the house edge can be 2-4% or higher.

Compare house edges across all games →

Related Guides

Blackjack House Edge

How low can it go?

Basic Strategy Chart Guide

Complete reference

18+ Only. Gambling involves risk. Please gamble responsibly. Learn more →

Player Hand	2	3	4	5	6	7	8	9	10	A
A,2	H	H	H	D	D	H	H	H	H	H
A,3	H	H	H	D	D	H	H	H	H	H
A,4	H	H	H	D	D	H	H	H	H	H
A,5	H	H	H	D	D	H	H	H	H	H
A,6	H	D	D	D	D	H	H	H	H	H
A,7	D	D	D	D	D	S	S	H	H	H

Player Hand	2	3	4	5	6	7	8	9	10	A
A,2	H	H	H	D	D	H	H	H	H	H
A,3	H	H	H	D	D	H	H	H	H	H
A,4	H	H	H	D	D	H	H	H	H	H
A,5	H	H	H	D	D	H	H	H	H	H
A,6	H	D	D	D	D	H	H	H	H	H
A,7	D	D	D	D	D	S	S	H	H	H

Player Hand	2	3	4	5	6	7	8	9	10	A
A,2	H	H	H	D	D	H	H	H	H	H
A,3	H	H	H	D	D	H	H	H	H	H
A,4	H	H	H	D	D	H	H	H	H	H
A,5	H	H	H	D	D	H	H	H	H	H
A,6	H	D	D	D	D	H	H	H	H	H
A,7	D	D	D	D	D	S	S	H	H	H