How do I conduct a barge draught survey?

Measure draught at multiple points and calculate cargo weight using displacement method.

Barge Draught Survey Calculator - Cargo Weight & Volume Measurement

Barge Draught Survey Calculator

Calculate the weight of cargo loaded or discharged from a barge using the draught survey method.

Initial Survey

Draft Readings (m)

FWD Port

FWD Stbd

MID Port

MID Stbd

AFT Port

AFT Stbd

Density & Displacement

Water Density (t/m³)

Displacement from Table (Tonnes)

Look up this value from hydrostatics using the Mean of Means draft below.

Deductibles (Tonnes)

Final Survey

Draft Readings (m)

FWD Port

FWD Stbd

MID Port

MID Stbd

AFT Port

AFT Stbd

Density & Displacement

Water Density (t/m³)

Displacement from Table (Tonnes)

Look up this value from hydrostatics using the Mean of Means draft below.

Deductibles (Tonnes)

Final Cargo Calculation

Enter valid data in both surveys to see the final cargo weight.

**Disclaimer:** This tool is for estimation and educational purposes. It performs standard draught survey calculations based on your inputs. The accuracy of the result is highly dependent on the accuracy of your draft readings, density measurements, and the hydrostatic data you look up from the barge's official tables. Trim and deflection corrections on displacement are not applied here for simplicity. Always rely on a certified marine surveyor for commercial and safety-critical calculations.