Good poker decisions come from numbers, not feelings, yet most of those numbers are tedious to work out by hand. These tools remove the friction. Each one isolates a single calculation that matters - the true return on a set of buy-ins, the realistic spread around a win rate, the bankroll a stake demands, or the hourly value of an edge - and presents it in a clean, terminal-style readout that updates live.
They are deliberately separate rather than crammed into one over-loaded form. A player checking whether their tournament results are genuinely profitable wants the ROI tool, not a wall of unrelated fields. Someone staring at a long losing stretch wants the variance calculator to tell them whether the downswing is alarming or routine. Splitting the work this way keeps each calculator honest about its inputs and its output, and makes the underlying formula easy to see rather than hidden inside a black box.
01The instruments
Pick the calculation you need. Each tool opens with realistic default values already filled in, so the readout makes sense before you have typed anything, and every field has a stepper for quick adjustments.
ROI Calculator
Buy-ins and total cashes become a true return-on-investment percentage and a net profit figure.
buy-ins · cashes→ROI % · profitopen › INSTR_02Variance Calculator
A win rate plus a standard deviation gives the expected result, the spread and a confidence band you can chart.
win rate · σ→spread · bandopen › INSTR_03Bankroll Calculator
A stake and a risk level turn into a recommended bankroll and the buy-in count behind it.
stake · risk→roll · buy-insopen › INSTR_04Win-Rate Converter
Move between bb/100, dollars per hour and a projected monthly figure with a couple of inputs.
bb/100→$/hr · monthlyopen ›02Which poker calculator should you use?
Choosing the right poker calculator depends on what you want to measure. Some tools are built to show whether your tournament results are actually profitable, while others help you understand variance, bankroll risk, or what a win rate means in real money. The table below compares the main poker calculators on this page so you can quickly see which one fits your game, your sample, and the question you are trying to answer.
| Poker calculator | Best for | Main inputs | What it shows | When to use it |
|---|---|---|---|---|
| Poker ROI Calculator | Tournament players who want to measure profitability | Buy-in, tournaments played, total cashes | ROI percentage and net profit | When you want to know whether your MTT or Sit & Go results are actually winning over your current sample |
| Poker Variance Calculator | Players trying to judge whether a downswing is normal | ROI, sample size, result spread or expected variance inputs | Expected swing range, confidence band and variance context | When your results feel too volatile and you want to separate normal variance from a possible leak |
| Poker Bankroll Calculator | Players choosing safer stakes and bankroll targets | Buy-in level, risk tolerance, ROI or edge assumptions | Recommended bankroll size in buy-ins or dollars | When moving up in stakes, planning volume, or checking whether your bankroll can survive normal swings |
| Poker Win-Rate Converter | Players who want to translate results into practical earnings | ROI, bb/100, hourly assumptions or game volume | Estimated hourly rate, monthly profit or converted win-rate figures | When you want to understand what your current edge could mean in real money over time |
| Poker ROI Guide | Beginners who want to understand the math before using advanced tools | Basic results data or formula inputs | ROI formula breakdown and a plain profitability explanation | When you are learning how poker ROI works and want the simple version before deeper variance or bankroll numbers |
No single calculator tells the whole story. The strongest read comes from combining them - an ROI for profitability, the variance tool for how reliable that figure is, and the bankroll calculator for what it all means at your stakes. Used together they turn a raw result into a decision you can actually trust.
03Who these calculators are for
The tools suit any player who tracks their results seriously, but each one earns its place for a particular kind of game:
- MTT players - the ROI and variance calculators turn a long, swingy tournament record into figures you can actually read.
- Sit & Go grinders - ROI plus bankroll sizing keep fast, high-volume play on a sustainable footing.
- Cash players - the win-rate converter maps bb/100 onto hourly and monthly earnings, while the variance tool frames the swings.
- Players moving up in stakes - the bankroll calculator checks whether the roll can survive the bigger swings before the jump.
- Newer players - the ROI guide explains the maths first, so the numbers mean something before you rely on them.
A simple order to use them
For most players the tools work best in sequence, each one building on the last:
- Measure your ROI to see whether you are actually profitable.
- Check variance to judge how reliable that ROI is over your sample.
- Size your bankroll around the result before changing stakes.
- Convert your win rate into a practical earnings estimate for planning.
04How to read the numbers they produce
A calculator only does the arithmetic; the interpretation is still up to the player. Two figures matter most across these tools. The first is the central estimate - the ROI, the expected profit, the recommended bankroll - which is the best single guess given the inputs. The second is the uncertainty around it, which the variance tool makes explicit and which quietly sits behind every other result. A confident-looking ROI built on a small sample is far less reliable than a modest one built on a large one, and the same caution applies to a win rate or an hourly estimate. Treating the outputs as data points to be confirmed over volume, rather than verdicts to be trusted on the spot, is what turns these calculators from a curiosity into a genuine edge.