Tablespoon vs Teaspoon vs Cup: What's the Difference?
Recipes use different volume units interchangeably, which gets confusing fast. Here's the breakdown of standard sizes, key differences, and when to use each.
Quick reference table
| Unit | Volume (ml) | Fluid oz | Tbsp equivalent |
|---|---|---|---|
| Teaspoon (tsp) | 5 ml | 0.17 fl oz | 1/3 tbsp |
| Tablespoon (tbsp) | 15 ml | 0.5 fl oz | 1 tbsp |
| Fluid ounce (fl oz) | 29.57 ml | 1 fl oz | ≈ 2 tbsp |
| 1/4 cup | 60 ml | 2 fl oz | 4 tbsp |
| 1/2 cup | 120 ml | 4 fl oz | 8 tbsp |
| Cup (US) | 240 ml | 8 fl oz | 16 tbsp |
| Pint (US) | 473 ml | 16 fl oz | 32 tbsp |
| Quart (US) | 946 ml | 32 fl oz | 64 tbsp |
Tablespoon vs Teaspoon
The most common confusion: tbsp ≠ tsp. 1 tbsp = 3 tsp. If a recipe asks for "1 tbsp salt" and you use 1 tsp, you'll have 1/3 of the salt the recipe expected — major flavor impact.
Key for accuracy
Regular kitchen tablespoons vary 12-18 ml. For baking, use measuring spoons calibrated to 15 ml (tbsp) and 5 ml (tsp). For everyday cooking, regular spoons are fine.
Cup — be careful with regional standards
Not all cups are created equal:
- US customary cup = 240 ml (most online recipes)
- US legal cup = 240 ml (FDA, slightly different)
- Metric cup = 250 ml (UK, Australia, Canada — modern recipes)
- Japanese cup = 200 ml (rice cooker cup)
Most American and online recipes use the 240 ml US cup. For best results, check the recipe origin and use the matching cup standard.
Fluid ounces vs ounces (weight)
Confusing point: "ounce" can mean weight (28.35 g) or volume (29.57 ml fluid). They're only equal for water (1 fl oz of water ≈ 1 oz weight). For other liquids, the relationship breaks down:
- 1 fl oz of milk weighs ≈ 30.5 g (density 1.03)
- 1 fl oz of olive oil weighs ≈ 26.9 g (density 0.91)
- 1 fl oz of honey weighs ≈ 42 g (density 1.42)
When in doubt, weight ounces are denoted "oz" or "1 ounce", and fluid ounces are "fl oz".
Quick conversions
Volume conversions
- 3 tsp = 1 tbsp
- 2 tbsp = 1 fl oz
- 4 tbsp = 1/4 cup
- 16 tbsp = 1 cup
- 2 cups = 1 pint
- 4 cups = 1 quart
When to use each unit
- Teaspoon: spices, salt, baking soda, vanilla extract — small amounts where precision matters
- Tablespoon: butter, sugar, oil — medium amounts
- 1/4 cup, 1/3 cup, 1/2 cup: flour, milk, chopped ingredients — larger volumes
- Cup: bulk ingredients in cakes and breads
Want exact gram conversions?
Volume measurements give different weights depending on the ingredient. For accurate gram conversions: