Fresh Ginger Root vs Ground Ginger: What Is the Equivalent?
Fresh and ground ginger come from the same plant, but they do not behave in the same way. A simple starting conversion helps, although the best amount depends on the dish and your preferred flavour.
A practical starting conversion
As a starting point, use around ¼ teaspoon of ground ginger in place of 1 tablespoon of freshly grated ginger. Ground ginger is more concentrated, so matching the two spoon for spoon would usually make its flavour too dominant.

This conversion is a guide rather than an exact rule. The strength of fresh ginger varies with age and storage, while ground ginger gradually loses intensity after opening.
How the flavour changes
Fresh ginger tastes bright, sharp and slightly juicy, while ground ginger has a warmer, softer flavour. Ground ginger blends evenly into a dish, whereas grated or chopped root adds small bursts of flavour.

The choice also affects the overall character of a recipe. Fresh root often suits dishes where a lively ginger note matters, while ground ginger works well when you want the flavour spread throughout.
Texture and moisture matter too
Fresh ginger brings moisture and a little fibrous texture, even when finely grated. Ground ginger is dry, so replacing fresh with ground removes both of those features.

In a sauce, soup or stew, that small moisture difference may not be noticeable. In a mixture where consistency matters, you may need to judge the texture after adding the substitute rather than relying only on the conversion.
Recording the swap in your food tracker
Log the form you actually use because fresh ginger and ground ginger are separate entries in many food databases. Choose an entry that matches the preparation, such as raw ginger root or ground spice, and record the measured amount.

For fresh ginger, weighing the edible portion can be more precise than estimating the size of a piece. For ground ginger, use its weight if your scales can measure such a small amount, or record the spoon measure shown in your chosen database entry.