Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Poker Variance & Confidence Calculator

Estimates the sample size required to confirm your poker win rate at a chosen statistical confidence level. Ideal for serious players questioning whether their recent results reflect true skill or short-term variance.

Standard Deviation (BB/100)

Target Precision (BB/100)

Fill in the required fields to see your result.

Poker

Poker Session ROI Calculator

Measure the true return on investment for a poker session after accounting for buy-in, cash-out, travel costs, and your hourly opportunity cost. Use it after any live or online session to track real profitability.

Total Buy-in Amount ($)

Cash-out Amount ($)

Session Length (hours)

Travel & Expenses ($)

Hourly Opportunity Cost ($/hour)

Fill in the required fields to see your result.

Key differences

	Poker Variance & Confidence Calculator	Poker Session ROI Calculator
Category	Poker	Poker
Inputs required	2	5
Result	Hands Needed for Confidence (hands)	Session ROI (%)
What it does	Estimates the sample size required to confirm your poker win rate at a chosen statistical confidence level. Ideal for serious players questioning whether their recent results reflect true skill or short-term variance.	Measure the true return on investment for a poker session after accounting for buy-in, cash-out, travel costs, and your hourly opportunity cost. Use it after any live or online session to track real profitability.