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Alvarado Appendicitis Screening Score Calculator — result sheet
Add the eight scored Alvarado/MANTRELS findings and show the transparent ten-point total without turning a screening score into a diagnosis.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Alvarado score = migration 1 + anorexia 1 + nausea/vomiting 1 + right-lower-quadrant tenderness 2 + rebound 1 + fever 1 + leukocytosis 2 + neutrophil shift 1; maximum = 10.
The page adds the original eight scored MANTRELS features and reports the total, the number of positive point-bearing features, and the proportion of the ten-point maximum. It does not apply a universal risk cutoff or decide the next clinical action.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Pain migration to the right lower quadrant — 2 choices
- Anorexia or loss of appetite — 2 choices
- Nausea or vomiting — 2 choices
- Right-lower-quadrant tenderness — 2 choices
- Rebound tenderness — 2 choices
- Fever or elevated temperature finding — 2 choices
- Leukocytosis — 2 choices
- Neutrophil left shift — 2 choices
Worked example
| Input | Value |
|---|---|
| Pain migration to the right lower quadrant | 1 |
| Anorexia or loss of appetite | 1 |
| Nausea or vomiting | 1 |
| Right-lower-quadrant tenderness | 2 |
| Rebound tenderness | 1 |
| Fever or elevated temperature finding | 1 |
| Leukocytosis | 2 |
| Neutrophil left shift | 1 |
Alvarado score = 1 + 1 + 1 + 2 + 1 + 1 + 2 + 1 = 10 points out of 10.
Assumptions and limits
- The findings are entered from a clinician’s history, examination, and laboratory review rather than self-assessed abdominal examination.
- The eight scored features follow the original ten-point Alvarado/MANTRELS weighting used by this worksheet.
- Right-lower-quadrant tenderness and leukocytosis contribute two points each; the other six features contribute one point each.
- The values describe the same clinical episode and are not mixed across dates or different patients.
- A screening score can be affected by age, pregnancy, other illness, examination timing, and local diagnostic practice.
- The page does not include imaging, urinalysis, pregnancy testing, inflammatory markers, or alternative diagnoses.
- The total cannot confirm or exclude appendicitis and must not be used as a triage substitute.
- Urgent or worsening abdominal symptoms require local medical assessment regardless of the calculated total.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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