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Calcimator

MEV Calculator

Estimate Maximal Extractable Value (MEV) opportunity sizing for sandwich attacks, accounting for gas costs, builder tips, competition, and success rates.

Inputs

%
%
%

Results

Profit per success ($)

-$5

Extractable value ($)$250
Gas cost (2 txns) ($)$30
Builder tip ($)$225
Effective win rate (%)10%
Expected profit per opp ($)-$27.5
Daily expected profit ($)-$550
Monthly expected profit ($)-$16,500
Daily gas spend ($)$600
Break-even extractable ($)$300
How to Use This Calculator
  1. Enter the Target Transaction Value ($) — the USD size of the victim transaction you are analyzing.
  2. Set the Target Price Impact % — the price slippage that target transaction creates, which is your extractable value.
  3. Enter Gas Price (Gwei), ETH Price ($), and Gas per MEV Tx to calculate total gas cost for front-run + back-run.
  4. Set Success Rate % (competition for block inclusion) and Daily Opportunities to estimate daily profit.
  5. Review Net Profit per Execution, Daily/Monthly MEV Income, and Break-Even Extractable Value to evaluate the opportunity.
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