Soy sauce

5 g1 teaspoon

15 g1 tablespoon

Soy sauce density ~1.0 g/ml; 1 tsp ~5 g.

Instead of Soy sauce

Mushroom soy sauce
Use 80% of the weight; darker and more intense, so taste before adding extra salt.
Worcestershire sauce
Use the same weight; sweeter and tangy, with less pure soy depth. Reduce added salt slightly.
Fermented soya bean paste
Use 50% of the weight, loosen with a little water and add salt carefully. Stronger, thicker fermented flavour.