Probability normalizer: two outcomes
Normalize two supplied probabilities without confusing a mathematical adjustment with a verified forecast.
Enter a scenario
Use one currency and unit throughout. Every field is required; no market or personal financial data is loaded.
Scenario result
Fill in every field and the result appears here as you type. An empty field is missing information, not zero.
Sources and scope
Checked November 5, 2026.
Probability normalizer: two outcomes uses the formulas shown above and assesses no personal financial circumstances.
Normalize two supplied probabilities
Probability normalization rescales two positive inputs so their adjusted shares sum to 100%. Each input is divided by their combined total. This is a mathematical comparison of the numbers you supply; it does not discover a hidden true probability or verify the source of a quoted price.
Hypothetical example: inputs of 60% and 50% have a combined total of 110%. Normalization gives about 54.55% and 45.45%. Both numbers changed because the denominator changed. The adjustment alone does not explain why the original total differed from 100%, whether the quotes were simultaneous or what costs a transaction would incur.
Check that the two sides are exhaustive, mutually exclusive outcomes of the same question. Two overlapping asset-price thresholds or unrelated event contracts fail that test. For a single contract’s price-to-settlement conversion, use the event-probability calculator instead; do not combine incompatible questions to manufacture a complete outcome set.