1 teaspoon of blueberries weighs 3.54 g. A teaspoon is one forty-eighth of a cup, and a cup of blueberries is 170 g spooned and levelled, so the maths is 170 ÷ 48 = 3.54 g. The same cup divided by 16 gives the tablespoon weight of 10.6 g, and there are 3 teaspoons in every tablespoon. If you cook from recipes written in cups and spoons, this page is the bridge between the two, and the worked examples show the conversion inside real dishes rather than in isolation.
Fresh blueberries are one of the few baking fruits measured by the spoon rather than by the handful, because a muffin batter only needs a spoonful or two of berries folded in at the end, and a sauce or a compote starts from a spoonful of berries mashed with sugar. They are also fiddly to weigh: a scale that reads in 1 g steps barely registers a single berry, so the teaspoon table on this page is often faster than the scale for the small amounts a recipe actually calls for.
All figures on this page are approximate, and they come from King Arthur Baking, measured spooned and levelled. When a recipe has to work the first time, verify with a kitchen scale.
Conversion table
One teaspoon is one forty-eighth of a cup, so every figure in this table is the cup weight divided by 48, rounded to two decimal places. All figures are approximate; verify with a kitchen scale when it matters.
| Teaspoons | Grams (approx.) |
|---|---|
| 1 tsp | 3.54 g |
| 2 tsp | 7.08 g |
| 3 tsp | 10.62 g |
| 4 tsp | 14.17 g |
| 5 tsp | 17.71 g |
| 6 tsp | 21.25 g |
| 7 tsp | 24.79 g |
| 8 tsp | 28.33 g |
| 9 tsp | 31.88 g |
| 10 tsp | 35.42 g |
| 11 tsp | 38.96 g |
| 12 tsp | 42.50 g |
The tablespoon figures are included too, because most recipes switch between teaspoons and tablespoons, and 3 teaspoons make 1 tablespoon.
| Tablespoons | Grams (approx.) |
|---|---|
| 1 tbsp | 10.6 g |
| 2 tbsp | 21.2 g |
| 3 tbsp | 31.9 g |
| 4 tbsp | 42.5 g |
| 5 tbsp | 53.1 g |
| 6 tbsp | 63.8 g |
| 7 tbsp | 74.4 g |
| 8 tbsp | 85.0 g |
| 9 tbsp | 95.6 g |
| 10 tbsp | 106.2 g |
| 11 tbsp | 116.9 g |
| 12 tbsp | 127.5 g |
| 13 tbsp | 138.1 g |
| 14 tbsp | 148.8 g |
| 15 tbsp | 159.4 g |
| 16 tbsp | 170.0 g |
One tablespoon is one sixteenth of a cup, so every tablespoon figure is the cup weight divided by 16, rounded to one decimal place.
Cups to grams for reference
When a recipe jumps from spoons to cups, use this table instead of counting out 16 tablespoons. Every figure is the cup weight multiplied by the fraction, rounded to one decimal place, and all figures are approximate.
| Cups | Grams (approx.) |
|---|---|
| 1/4 cup | 42.5 g |
| 1/3 cup | 56.7 g |
| 1/2 cup | 85.0 g |
| 2/3 cup | 113.3 g |
| 3/4 cup | 127.5 g |
| 1 cup | 170.0 g |
One cup of blueberries weighs 170 g, so a quarter cup is 42.5 g and half a cup is 85.0 g. Those two figures cover most everyday scaling, and the full table above covers the rest.
How the measurement works
The figure on this page comes from King Arthur Baking, measured spooned and levelled. Small, sweet blue berries. Muffins, pancakes, salads and snacking.
A note on disputed figures. King Arthur gives a range of 140-170 g per cup for fresh blueberries; we use the top of the range, 170 g.
All results on this page are approximate. Ingredient weights vary with brand, humidity, temperature and how firmly you pack the spoon, so when a recipe has to work the first time, weigh the ingredient on a kitchen scale and use the numbers here as a guide. The method matters more than the number itself, because the same spoon of blueberries measured two different ways can give two different weights, and the King Arthur Baking value assumes the spooned and levelled method every time.
Worked examples
A spoonful folded into pancake batter
A single-serve pancake batter takes 2 teaspoons (7.08 g) of blueberries folded in just before the batter hits the pan, so the berries stay whole instead of bursting and streaking the pancakes purple. The amount matters because too many berries make the batter wet and the pancakes fall apart when you flip them, while too few leave most bites berry-free.
A quick blueberry sauce for yoghurt
A breakfast sauce for two starts with 6 teaspoons (21.25 g) of blueberries simmered with a teaspoon of sugar and a splash of water until the berries burst, and the spoon measure keeps the sauce thick enough to sit on yoghurt instead of running off it. Level each spoon so the sugar-to-berry ratio stays the same every time.
Topping a small tart
A single tartlet needs about 4 teaspoons (14.17 g) of blueberries arranged on the custard before baking, and the weight tells you how many berries that really is — roughly a small handful. If the berries are large, count them rather than trusting the spoon, since a spoon of big berries holds more air than a spoon of small ones.
Practical guidance
Spoon blueberries gently and level them with a knife, but do not press down: crushed berries leak juice and weigh more per spoon than whole ones, and the juice stains everything it touches. Wash the berries and dry them before measuring, because water clinging to the skins adds weight that the recipe did not ask for, and wet berries sink in a batter. Frozen blueberries weigh a little more per spoon than fresh ones, since ice crystals add mass, so use them straight from the freezer and do not thaw them first.
Blueberries vary more than most ingredients on this site, because berry size changes with the variety and the season. That is exactly why the density note matters: the King Arthur range runs from 140 g to 170 g per cup, and we use the top of the range. If your berries are small and wild, expect a slightly heavier spoon; if they are large and cultivated, expect a lighter one. For a sauce or a smoothie the difference does not matter, but for a cake where the fruit-to-batter ratio decides the crumb, weigh the berries.
Scaling with spoons is easy once you know the weight of one spoon. To measure 100 g of blueberries, count out about 28.2 teaspoons, and for 50 g, about 14.1 teaspoons. Halving a recipe that calls for 4 teaspoons means using 2 teaspoons, or 7.08 g, and doubling it means 8 teaspoons, or 28.33 g. The key is to scale every ingredient by the same factor, because changing one ingredient without changing the others throws the recipe out of balance. For large amounts, switch to a cup measure or a scale, since counting out teaspoons one by one is slow and error-prone, and a cup is faster and more accurate.
When should you weigh blueberries instead of measuring it? Whenever the recipe has to work the first time, and whenever the amount is large. A kitchen scale costs less than a single failed bake, and it removes the biggest source of variation in home cooking, which is the way ingredients pack into a cup or a spoon. Put the bowl on the scale, press tare, and add the blueberries until the display shows the number you need. There is nothing to wash afterwards except the bowl, and the result is the same every time. For small amounts, a level spoon is accurate enough, and for anything where precision matters, the scale is the tool to reach for.
Storage. Refrigerate unwashed; use within 1 week.
- Level every spoon with the back of a knife.
- Use spoons for small amounts, and a scale for large ones.
- Keep the same spoon for the whole recipe so errors stay consistent.
Frequently asked questions
How many grams is 1 teaspoon of blueberries?
One level teaspoon of blueberries weighs approximately 3.54 g. That figure comes from dividing the cup weight of 170 g by 48, and it assumes the ingredient is measured spooned and levelled. All figures on this page are approximate, so verify with a kitchen scale when it matters.
Do fresh and frozen blueberries weigh the same per teaspoon?
Not quite. Frozen blueberries weigh a little more per teaspoon than fresh ones, because ice crystals add mass and the berries pack more tightly. The difference is small — a gram or two per spoonful — so for sauces and smoothies use the table as it stands, and for baking weigh the frozen berries straight from the bag.
Why do different sources give different weights for blueberries?
Because berry size varies. King Arthur gives a range of 140-170 g per cup for fresh blueberries, and we use the top of the range, 170 g. Small wild berries pack tightly and weigh more per cup; large cultivated berries leave more air gaps and weigh less. The teaspoon figure on this page is approximate for exactly that reason.
How many blueberries are in a teaspoon?
Roughly 3 to 5 berries, depending on their size. A teaspoon of blueberries weighs about 3.54 g. Counting is a reasonable check when you only need a few berries, but for a batter or a sauce the spoon measure is faster.
How many teaspoons of blueberries are in a tablespoon?
There are 3 teaspoons in 1 tablespoon, so 1 tablespoon of blueberries weighs approximately 10.6 g, which is three times the teaspoon weight of 3.54 g. Use the tablespoon table on this page when a recipe switches between the two units.
How should I store blueberries?
Refrigerate unwashed; use within 1 week. Keeping it stored properly also keeps its weight consistent, since an ingredient that has absorbed moisture or dried out will not weigh the same per spoon as a fresh one.