Spice Conversion Chart

Whole to ground, ground to whole — ground spices are more concentrated, so the amount needs to change too.

The amount your recipe calls for, in the spice form you're converting from.
Match the measurement your recipe uses.
Choose which form your recipe lists and which form you actually have.

Why ground spice replaces less whole spice by volume

Grinding a whole spice breaks it down and exposes far more surface area, releasing its flavor and aroma compounds much more readily — the standard rule of thumb is that 1 teaspoon of ground spice is roughly equivalent to 1 tablespoon of the same spice whole (a 3:1 ratio), similar to the fresh-to-dried herb ratio for the same underlying reason.

Toasting and grinding fresh changes the equation

Pre-ground spices lose potency in storage faster than whole ones, since more surface area means faster flavor loss over time — a whole spice toasted and ground fresh right before use is noticeably more potent than the same weight of a jar of pre-ground spice that's been sitting for months. If a recipe seems under-seasoned compared to what a chart suggests, aging spice is a common, easy-to-overlook reason.

This ratio is a starting point, not a fixed law

Exact potency loss from grinding varies by spice — some (like cinnamon or cumin) hold their strength fairly well either way, while others shift more dramatically. Start with the 3:1 conversion and taste as you go, the same way you would with any substitution that changes concentration rather than swapping in a completely different flavor.