Top-20 Finish Probability Calculator

The intended use of this page

Begin with the question behind adjusted probability—combine a baseline probability with explicit adjustments and confidence weighting. When using the result, keep the arithmetic separate from the later decision about price and stake.

Top-20 Finish Probability depends on the event scope represented by Baseline probability and Confidence weight.

In the current scenario, a material participant, format, or source change requires a new adjusted probability baseline.

Within this calculation, field strength, course fit, tee time, weather, and starting status should match the tournament being priced.

On this page, a withdrawal or major weather split can change the field and invalidate an earlier estimate.

Stress-testing the baseline

Under the entered assumptions, create a neutral case before applying the full change to Confidence weight.

For this market, shrink a small-sample rating gap toward the broader baseline.

For the saved case, a large fair-price swing signals sensitivity to scale or confidence.

Baseline probability belongs to the same period as the other entries. It is starting probability before adjustments. Primary adjustment belongs to the same period as the other entries. It is first percentage-point adjustment.

For adjusted probability, Secondary adjustment represents second percentage-point adjustment. Confidence weight is a separate input defined as share of the adjusted estimate to retain. The remainder moves toward 50%.

At this stage, confirm that the baseline and adjustment did not both come from the same news.

Formula mechanics

Under the entered assumptions, the calculation uses final probability = 50% + (baseline + adjustments − 50%) × confidence weight.

The displayed chance is conditional on the selected rating scale and adjustments.

A large market gap is a reason to inspect calibration first.

For this market, use a separate scenario for a plausible upper or lower assumption.

The result should move for a documented reason.

An unexplained adjustment makes later review difficult.

In the current scenario, compare only after confirming same event, selection, and settlement period.

Following the calculation

When using the result, this worked case verifies the method without describing a typical market.

For the Top-20 Finish Probability Calculator, use the worked case as a reproducibility check before entering live market assumptions. None of its values should be copied automatically.

Applying the Top-20 Finish Probability rule: final probability = 50% + (baseline + adjustments − 50%) × confidence weight.

• Fair odds: +151
• Weighted adjustment: 0.00 points

For this adjusted probability example, when the worked result differs, verify the field values one by one rather than changing several assumptions together.

On this page, a clean reproduction is not evidence that the inputs are accurate.

Adjustments are percentage points, not multiplicative percentages.

Within this calculation, review dead-heat deductions, place terms, cut rules, ties, and whether the wager covers a round or tournament.

For this market, the calculation cannot verify whether every source was collected at a compatible time.

When to update the page

Under the entered assumptions, start a new case when period, participant, settlement rule, or source definition changes.

At this stage, start a new case when period, participant, settlement rule, or source definition changes.

For the saved case, keep current availability separate from the stored estimate.

The Top-5 Finish Probability is useful only if that separate output affects the decision.

Questions about the inputs