Calculate left atrial volume from standard echo dimensions. Compare multiple methods and body size indexing. Export results, charts, tables, and summaries for documentation today.
| A1 | A2 | L | D1 | D2 | D3 | BSA | Area-Length | Ellipsoid | Average | Indexed Average |
|---|---|---|---|---|---|---|---|---|---|---|
| 22.5 cm² | 21.2 cm² | 6.5 cm | 5.0 cm | 4.6 cm | 4.4 cm | 1.82 m² | 62.29 mL | 52.99 mL | 57.64 mL | 31.67 mL/m² |
Area-length method: LA Volume = (8 / (3π)) × (A1 × A2) / L
A1 and A2 are traced atrial areas. L is the longest atrial length. When measurements are converted to centimeters, the result is cubic centimeters, which equals milliliters.
Prolate ellipsoid method: LA Volume = (π / 6) × D1 × D2 × D3
D1, D2, and D3 are orthogonal atrial diameters. This method treats the chamber as an ellipsoid and is useful when diameter-based measurements are available.
Indexed value: LAVI = LA Volume / BSA
Indexing normalizes the reported volume to body size. This file lets you choose area-length, ellipsoid, or the average as the primary reported method.
This calculator applies geometric volume estimation to left atrial measurements. It supports two common modeling approaches, handles unit conversion, and produces indexed output when body surface area is provided. The structure is useful for quick reviews, education, worksheets, and repeatable documentation.
The chart helps compare method outputs visually. The method-difference field can highlight when measurement sets are closely aligned or when the underlying inputs may need another quality check. Use the results with clinical judgment rather than as a standalone diagnostic conclusion.
It estimates left atrial volume from measured atrial areas, diameters, and length. It can also index the chosen result to body surface area.
Use the method that matches your available measurements or workflow. If both are available, the average option offers a quick comparison-focused summary.
Body surface area lets the calculator produce an indexed volume. That can help compare chamber size across patients with different body sizes.
Yes. The calculator converts supported length and area units automatically before applying the formulas, so the final volume remains consistent.
It shows the percentage gap between area-length and ellipsoid outputs. A larger gap may suggest reviewing tracing quality or measurement consistency.
No. It is a geometry and indexing tool. Interpretation should always be combined with clinical context, imaging quality, and professional judgment.
The calculator will still work if one complete method is entered. The average becomes the same as the single available volume result.
The CSV export saves the current result table. The PDF export creates a clean summary page with the same calculated metrics.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.