This entry covers baking soda, also called bicarbonate of soda in the cited manufacturer material. It remains separate from baking powder, even when both are measured in teaspoons.
Keep different references separate
King Arthur provides a source-spoon relationship. The selected Dr. Oetker reference describes its level-teaspoon sachet and a matching recipe with an established teaspoon volume.
Other recipe statements can use different rounded spoon weights. BatchLadle preserves the selected product-specific relationship rather than averaging those numbers into an invented universal density.
Check the named product
The manufacturer reference applies to its stated sachet and level measure. It should not be presented as a validation of every brand, package, or filling method.
If your original recipe supplies grams, scale those grams directly. If it specifies a packet, retain the packet’s actual mass instead of assuming that all packets are the same size.
Retain small quantities and notes
After scaling, inspect the result before choosing a rounded display. Keep the original amount so future serving changes do not compound an earlier rounding choice.
A quantity conversion does not adjust the recipe’s acidity or establish a baking-powder substitution. Preserve the original ingredient choice and method unless you are making a separate recipe-development decision.