Identify what the ginger paste must do in your dish: bright flavor, thick texture, or quick convenience.
Start with the closest ratio from the table (1:1 best matches). If your substitute is wetter, drain/squeeze to prevent thinning.
If using dried ginger (ground ginger or ginger powder), re-hydrate with a small splash of warm water until it forms a loose paste.
Adjust at the end: add a pinch of salt to lift flavor, or a small splash of vinegar/acid if the swap tastes dull.
Taste before serving and fine-tune—ginger substitutes vary a lot in sharpness and sweetness.