Make the weight in each entry meaningful by recording a consistent unit and equipment convention.
Know what the number includes
For a barbell, decide whether the logged figure includes the bar and all plates. For dumbbells, write down whether it means one dumbbell or the pair.
Keep units clear
Weights supports kg and lb. Check the selected unit and inspect existing values when changing a setting; do not assume a conversion behavior.
Use arithmetic separately
The website barbell calculator totals entered equipment mass. It does not prescribe a training load or automatically detect your plates.