Once your tournament stack drops below about 20 big blinds, poker stops being a game of small raises and careful postflop play. It becomes a push-or-fold decision on almost every hand, and getting that range wrong bleeds chips fast.
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The Push Fold Calculator gives you a shoving range based on your exact stack depth, table position, and how many players remain, using established short-stack strategy research as its foundation.
It also adjusts for ICM pressure on the bubble or at a final table, since a chip-EV-optimal shove range is often too wide once real money pay jumps are on the line.
π How to Use the Push Fold Calculator
Enter your effective stack size in big blinds β this is the single biggest factor in your shoving range, since ranges tighten dramatically as your stack grows past roughly 15-20 big blinds.
Effective stack means the smaller of your stack and your opponent’s stack if it’s a single confrontation, or your own stack if multiple players could call β always use the tightest relevant comparison.
Select your table position, since the correct range widens enormously from early position to the button and small blind, then toggle ICM pressure on if you’re near the money bubble or at a final table.
π’ Calculator Fields Explained
Effective Stack (Big Blinds) – your tournament stack expressed in big blinds, the standard unit for short-stack strategy.
Your Position – your seat relative to the button, which drives how wide your shoving range should be.
Players Left at the Table – how many players remain, used to estimate your M-ratio.
Average Ante Per Player – the typical ante contributed per player, in big blinds, also used for the M-ratio estimate.
Bubble / Final Table ICM Pressure – whether pay-jump considerations should tighten your recommended range below the pure chip-EV optimal.
π° Understanding the Results
| Result Field | What It Tells You |
|---|---|
| Shove Range (Top % of Hands) | The percentage of all starting hands strong enough to shove profitably here |
| M-Ratio | Your stack expressed as a number of orbits you can survive, a broader urgency gauge than raw BBs |
| M-Ratio Zone | A quick color-coded read on how urgently you need to find a shoving spot |
| Base Range (Middle Position) | The unadjusted range before your specific position is applied, for reference |
The Shove Range is the number to actually act on; the M-Ratio and its Zone exist mainly to build your intuition for how urgent your situation is beyond just the raw big blind count.
A wide shove range from the button doesn’t mean any two cards are playable β even at 10 big blinds, genuinely weak, unconnected low cards still lose value as a shove in most spots.
ICM pressure changes the correct range more than most players expect, since protecting your remaining stack against elimination can outweigh a small chip-EV edge on a marginal shove.
π Calculation Formulas
| Concept | Formula / Logic | Notes |
|---|---|---|
| M-Ratio | stack Γ· (1.5 + antes Γ players at table, capped at 9) | Approximates orbits of survival |
| Base Shove Range | Lookup by stack depth in BBs | Widens sharply as stack shrinks |
| Position Adjustment | base range Γ position multiplier | Button/SB widen it, early position tightens it |
| ICM Adjustment | range Γ 0.7 if bubble/final table pressure | Simplified tightening, not a full ICM solve |
This tool uses a simplified lookup-table model rather than a full Nash equilibrium solver, so treat the output as a strong practical guideline rather than an exact solved-game number.
A true Nash push/fold solve also accounts for your opponents’ actual calling ranges, which vary by player and situation in ways a simplified chart can’t fully capture.
π Practical Examples
Example 1 – Button Shove, No ICM: 10 BB stack, button, no ICM pressure. Base range (middle position) = top 32%. Button adjustment (Γ1.6) widens it to nearly top 51%.
Example 2 – Same Stack, Early Position: Same 10 BB stack, but early position instead. Adjustment (Γ0.55) tightens the range to roughly top 18% β a dramatically narrower shoving range at the identical stack depth.
Comparing Examples 1 and 2 shows why “10 big blinds” alone is never enough information β position swings the correct range by roughly 3x at the exact same stack size.
Example 3 – Desperate Short Stack: 5 BB stack, button, no ICM pressure. Base range = top 55%. Button adjustment pushes it close to top 88% β shoving nearly any two cards.
Example 4 – Same Short Stack, Bubble ICM Pressure: Same 5 BB button shove, but with ICM pressure toggled on. The recommended range tightens from roughly 88% down to about 62%, showing how much survival value matters even at a stack this short.
π‘ Tips & Best Practices
Treat your effective stack, not your total chip count, as the number that matters when a shove could be called by a much shorter or much deeper opponent.
Widen your own calling range less aggressively than your shoving range β profitable calls generally need a somewhat stronger hand than a profitable shove of the same size.
Watch your M-Ratio zone as a broader urgency signal, especially in the Orange and Red zones, where finding any reasonable shove becomes increasingly important.
Memorizing a simplified push/fold chart for your most common stack depths pays off faster than almost any other tournament study time investment.
Recognize that antes meaningfully lower your effective M-ratio compared to blinds-only tournaments, making shoves correct slightly sooner than in ante-free structures.
Adjust for specific opponents when possible β a very tight big blind calling range justifies shoving wider than the generic chart suggests.
- Recheck your range as your stack crosses each major threshold (15, 10, 7, 5 big blinds)
- Treat final-table ICM spots as needing an even tighter range than the standard bubble adjustment shown here
β οΈ Common Mistakes to Avoid
Using One Flat Range Regardless of Position
Some players memorize a single “10 big blind shove range” and apply it everywhere, ignoring how dramatically position changes the correct range.
Applying an early-position shove range from the button leaves enormous chip-EV on the table, since the correct button range is often three times wider.
Always adjust for position rather than relying on a single memorized number.
Ignoring ICM Pressure Near the Bubble
Chip-EV-optimal shove ranges frequently overshove relative to what real money considerations justify near the bubble or a final table.
Shoving a chip-EV-correct wide range right before the bubble, without accounting for ICM, can be a costly mistake if it results in an early elimination just before the money.
Tighten your range specifically during genuine ICM-pressure spots.
Confusing M-Ratio With Simple Big Blind Count
M-Ratio and raw big blind count measure related but distinct things, and treating them as interchangeable causes confusion in ante-heavy late stages.
A stack that looks comfortable in raw big blinds can have a dangerously low M-Ratio once heavy antes are factored in, especially at a full table.
Overcalling Wide Shove Ranges
Seeing that a wide shove range is correct for the shover doesn’t mean the same wide range is correct for calling that shove.
Calling ranges generally need to be tighter than shoving ranges of the same approximate width, since the caller risks more chips with less initiative.
π― When to Use This Calculator
Use this calculator any time your tournament stack drops toward or below 20 big blinds and you’re deciding whether a given hand is a profitable all-in.
Strong tournament players often describe push/fold competence as one of the fastest skills to learn and one of the most costly to skip, since short-stack spots come up in nearly every tournament.
It’s also useful for reviewing hands after a session, checking whether a specific shove or fold decision matched the statistically correct range for that exact stack and position.
π Related Calculators
ICM Calculator, M-Ratio Calculator, Poker Variance Calculator, Nash Equilibrium Calculator
π Glossary
Push/Fold – a simplified short-stack strategy where every decision is either shoving all-in or folding, with no intermediate raise sizes.
Effective Stack – the smaller of your stack and the relevant opponent’s stack in a given confrontation.
M-Ratio – your stack divided by the cost of one full orbit of blinds and antes, measuring survival time rather than raw chip count.
ICM – Independent Chip Model, used to convert tournament chip stacks into real money equity based on payout structure.
Bubble – the stage of a tournament immediately before the remaining players start cashing.
Shove Range – the set of starting hands strong enough to profitably move all-in from a given position and stack depth.
Nash Equilibrium (Push/Fold) – a solved strategy where neither the shover nor the caller can improve their result by deviating unilaterally.
Ante – a forced bet contributed by every player each hand, common in later tournament stages.
Big Blind (Unit) – the standard unit for measuring tournament stack depth, rather than raw chip counts.
Final Table – the last table of a tournament, where ICM pressure is typically at its highest due to large pay jumps.
β Frequently Asked Questions
At what stack size should I start thinking in push/fold terms?
Most short-stack strategy becomes relevant once your effective stack drops below roughly 15-20 big blinds, since standard postflop play loses much of its room to maneuver below that point.
Some players start incorporating push/fold thinking even earlier, around 25 big blinds, specifically for late-position spots against short stacks.
Why does position matter so much at the same stack depth?
Fewer players are left to act behind you in late position, meaning fewer chances your shove gets called, which directly widens the range of hands that show a profit.
A hand that loses money shoved from early position, with seven players still left to act, can be a clearly profitable shove from the button with only two players left to act behind you.
This is why a single flat range across all positions leaves significant value unclaimed.
How much should ICM actually tighten my range?
It depends on how severe the pay jump is, but a meaningful tightening β often 20-40% narrower than the chip-EV range β is common in genuine bubble or final-table spots.
The tightening should scale with how much is specifically at stake in the next pay jump, not apply as a flat rule at every stage of a tournament.
Is this the same as a full Nash equilibrium solve?
No β this uses a simplified, research-based lookup table rather than solving the exact game tree for every specific stack and opponent range combination.
A dedicated push/fold solver will give more precise numbers for a specific exact scenario, but this chart-based approach captures the same practical decision-making patterns.
Does this calculator account for multiple opponents behind me?
Position selection implicitly accounts for typical opponent counts at each seat, but it doesn’t model specific opponents’ individual calling tendencies.
Adjust manually tighter against multiple loose-calling opponents, or wider against a table of consistently tight players.
βοΈ Legal Disclaimer
This calculator is provided for informational and educational purposes only. Push/fold ranges are simplified approximations based on established short-stack strategy research and do not guarantee results. Please gamble responsibly.
