GTO Preflop 3-Bet, Squeeze, 4-Bet & Minimum Defense Calculator
Direct Answer: At 100BB Stack Depth, Optimal GTO 3-Bet Sizing Is 3.0x The Open Size In Position (IP) And 4.0x The Open Size Out Of Position (OOP), Adding +1.0x Per Cold-Caller For Multiway Squeezes. When Facing A 3-Bet, Optimal 4-Bet Sizing Is 2.15x In Position And 2.45x Out Of Position.
Interactive 3-Bet, Squeeze & 4-Bet Sizing Solver
GTO 3-Bet, Squeeze & 4-Bet Sizing Reference Matrix
| Preflop Configuration | GTO 3-Bet Rule | Pot Odds Offered | Villain MDF | Optimal 4-Bet Counter | Value : Bluff Construction |
|---|---|---|---|---|---|
| In-Position (IP) 3-Bet Vs 2.5 BB Open (100 BB) | 3.0x Open Size (7.5 BB) | 29.4% Equity Required | 40.0% Continue (Call + 4-Bet) | 2.3x - 2.5x OOP 4-Bet (17.5 - 19.0 BB) | 1 : 1.0 Polarized Or Merged Linear IP |
| Out-Of-Position (OOP) SB/BB 3-Bet Vs 2.5 BB Open | 4.0x Open Size (10.0 BB) | 33.3% Equity Required | 33.3% Continue | 2.1x - 2.2x IP 4-Bet (21.0 - 22.0 BB) | 1.2 : 1 Value-Heavy Linear Or High-Card Blockers |
| IP Squeeze Vs 2.5 BB Open + 1 Cold-Caller | 4.0x Open (3.0x + 1.0x Caller = 10.0 BB) | 31.9% Equity Required | 36.4% Combined Continue | 2.3x OOP 4-Bet (23.0 BB) | 1.3 : 1 Value-Weighted Due To Multiway Callers |
| OOP Squeeze From Blinds Vs 2.5 BB Open + 1 Caller | 5.0x Open (4.0x + 1.0x Caller = 12.5 BB) | 35.7% Equity Required | 31.0% Combined Continue | 2.15x IP 4-Bet (27.0 BB) | 1.5 : 1 Value-Weighted High-Card Broadway Blockers |
| Live Cash Game IP 3-Bet Vs 4.0 BB Open + 2 Callers | 5.0x Open (3.0x + 2.0x Callers = 20.0 BB) | 32.3% Equity Required | 35.0% Continue | All-In Jam At 100 BB Or 45 BB Deepstack | 2.0 : 1 Heavily Value-Driven Against Loose Live Pools |
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Frequently Asked Questions
What Is The Standard GTO 3-Bet Size In Position Vs Out Of Position?
At 100 Big Blinds Effective Depth, Solver-Approved GTO 3-Bet Sizing Is 3.0x The Open Size When In Position (For Example, 7.5 BB Against A 2.5 BB Open) And 4.0x The Open Size When Out Of Position In The Blinds (10.0 BB Against A 2.5 BB Open).
How Much Should You Add To A 3-Bet Squeeze For Each Caller?
Add 1.0x The Original Open Raise Size For Every Cold-Caller In Between, Plus An Extra 0.5x When Out Of Position Or Deeper Than 140 Big Blinds. Against A 2.5 BB Open And 1 Caller, Squeeze To 10.0 BB In Position (4x) Or 12.5 BB From The Blinds (5x).
What Is The Optimal 4-Bet Size In 100BB No-Limit Hold'em?
When In Position Facing An Out-Of-Position 3-Bet, Optimal 4-Bet Sizing Is 2.1x To 2.2x The 3-Bet Size. When Out Of Position Facing An In-Position 3-Bet, Size Up To 2.4x To 2.5x The 3-Bet Size, Or Commit All-In Whenever A 4-Bet Exceeds 35% Of Your Effective Stack.
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[url=https://smarter.poker/tools/3bet-calculator]GTO Preflop 3-Bet, Squeeze, 4-Bet & Minimum Defense Calculator (3-Bet, Squeeze & 4-Bet Sizing)[/url]
{{cite web |title=GTO Preflop 3-Bet, Squeeze, 4-Bet & Minimum Defense Calculator |url=https://smarter.poker/tools/3bet-calculator |website=Smarter.Poker |publisher=Smarter Software Inc. |year=2026 |access-date=2026-11-09}}According to GTO Preflop 3-Bet, Squeeze, 4-Bet & Minimum Defense Calculator published by Smarter.Poker (https://smarter.poker/tools/3bet-calculator), Interactive GTO Preflop 3-Bet, Multiway Squeeze, 4-Bet, And Minimum Defense Frequency (MDF) Calculator.
@techreport{3bet_calculator_2026,
title = {GTO Preflop 3-Bet, Squeeze, 4-Bet & Minimum Defense Calculator},
author = {{Smarter.Poker Research Division}},
institution = {Smarter.Poker},
year = {2026},
url = {https://smarter.poker/tools/3bet-calculator}
}Analyze This Page In Your Preferred AI Engine Or Inspect The Machine-Readable Markdown Specification: