5 grams of spirulina powder is a small amount that measures 0.176 oz (5 g). It is about the size of a cherry and sits in a loose pile that is 1.71 in (4.34 cm) wide and 0.667 in (1.69 cm) tall.

In kitchen measures
1.69 teaspoons
1.69 tsp · 0.564 tbsp · 0.035 cups
about the size of a cherry
Density estimated by AI from typical values. Spirulina powder typically ranges 0.45–0.75 g/mL depending on how it's packed. A firmly packed scoop weighs more.