Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 tbsp | 0.00300001 tsp | |
| 0.01 tbsp | 0.0300001 tsp | |
| 0.1 tbsp | 0.300001 tsp | |
| 1 tbsp | 3.00001 tsp | |
| 5 tbsp | 15 tsp | |
| 10 tbsp | 30.0001 tsp | |
| 50 tbsp | 150 tsp | |
| 100 tbsp | 300.001 tsp | |
| 1000 tbsp | 3000.01 tsp |
Common tablespoon values converted to teaspoon — factor: 1 tbsp = 3 tsp
| Tablespoon (tbsp) | Teaspoon (tsp) | Context |
|---|---|---|
| 0.25 tbsp | 0.75 tsp | Pinch |
| 0.5 tbsp | 1.5 tsp | Half tablespoon |
| 1 tbsp | 3 tsp | Tablespoon |
| 2 tbsp | 6 tsp | 2 tablespoons |
| 4 tbsp | 12 tsp | Quarter cup |
| 8 tbsp | 24 tsp | Half cup |
| 16 tbsp | 48 tsp | One cup |
| 32 tbsp | 96 tsp | One pint |
| 48 tbsp | 144 tsp | One quart |
| 64 tbsp | 192 tsp | One quart |
| 128 tbsp | 384 tsp | Half gallon |
| 256 tbsp | 768 tsp | One gallon |
| 512 tbsp | 1,536 tsp | 2 gallons |
| 1,024 tbsp | 3,072 tsp | 3 gallons |
| 2,048 tbsp | 6,144 tsp | 8 gallons |
Converting tablespoon to teaspoon comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using teaspoon, or a laboratory protocol may specify volumes in tablespoon that need to be measured with equipment calibrated in teaspoon.
In everyday use, knowing that 5 tbsp = 15 tsp and 10 tbsp = 30 tsp covers most common situations. For bulk calculations, 100 tbsp = 300 tsp is a useful anchor. The reverse conversion — teaspoon back to tablespoon — uses the factor 0.3333, so 1 tsp = 0.3333 tbsp.
All conversions use the internationally recognized factor of exactly 1 tbsp = 3 tsp. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Teaspoon = Tablespoon × 3.0000081
Multiply any tablespoon value by 3.0000081 to get teaspoon. One tablespoon equals 3.0000081 tsp.
Reverse: Tablespoon = Teaspoon × 0.33333243
Tablespoons × 3 = teaspoons. One tablespoon = exactly three teaspoons.
4 tbsp = 12 tsp = ¼ cup.
Teaspoons ÷ 3 = tablespoons.
Measures butter, oil, and liquid sweeteners in tablespoons for precise small-batch baking.
Labels liquid medications in tablespoon doses (1 tbsp = 15 mL) for home administration.
Scales facial mask and scrub recipes using tablespoon proportions.
Measures herbal tinctures and infusions in tablespoons for daily supplement protocols.
Tests sauces and dressings where tablespoon quantities critically affect flavor.
Converts pet supplement doses to tablespoons for clear owner instructions.
The US tablespoon is defined as exactly 3 teaspoons or ½ fluid ounce, approximately 14.787 mL. Standardization arrived in the late 19th century alongside modern recipe writing.
Tablespoons are fundamental to cooking and medicine. The Australian tablespoon is 20 mL, the UK tablespoon is 17.76 mL, and the US tablespoon is 14.79 mL.
Interesting fact: Capital T for tablespoon versus lowercase tsp for teaspoon is a convention designed to prevent dangerous dosing errors in medical and culinary contexts.
The US teaspoon is exactly one-third of a tablespoon, 4.92892 mL. It was standardized in the US in the early 20th century partly to address inconsistent home medication dosing.
Teaspoons are the smallest standard cooking measure in the US system, used for spices, leaveners, and flavorings. A medical teaspoon dose conventionally means 5 mL.
Interesting fact: The teaspoon is behind one of science's most cited comparisons: the entire Pacific Ocean would fill roughly 7.1 × 10²³ teaspoons.