Tablespoon (US) to Teaspoon (US) Converter
Volume · unit-converter
Convert Tablespoon (US) to Teaspoon (US) with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use liter-based factors (US fluid measures, imperial UK units, SI cubic meters).
Calculator
From: Tablespoon (US) (tbsp)
To: Teaspoon (US) (tsp)
About Tablespoon (US)
The US tablespoon is 1/2 US fluid ounce (about 14.7868 ml). US recipes use tablespoons for cooking volumes.
About Teaspoon (US)
The US teaspoon is 1/6 US fluid ounce (about 4.9289 ml). US recipes use teaspoons for spices and small liquid amounts.
How to convert tablespoons (us) to teaspoons (us)
1 tablespoon (us) is equal to 3 teaspoon (us):
1 tbsp = (0.01478676478125 L ÷ 0.00492892159375 L) tsp = 3 tsp
1 US tablespoon = 3 US teaspoons exactly (1/2 fl oz vs 1/6 fl oz of a US gallon).
Each tablespoon (us) is defined as 0.01478676478125 L and each teaspoon (us) as 0.00492892159375 L, so one tbsp equals 0.01478676478125 ÷ 0.00492892159375 tsp = 3 tsp.
Let V(tbsp) be the numeric value of the same volume measured in Tablespoon (US) (tbsp), and V(tsp) the value in Teaspoon (US) (tsp). Then:
V(tsp) = V(tbsp) × (0.01478676478125 / 0.00492892159375)
Equivalently, divide by how many tbsp fit into one tsp (liters per tsp divided by liters per tbsp):
V(tsp) = V(tbsp) ÷ 0.33333333333333
Or: teaspoon (us) = tablespoon (us) ÷ 0.33333333333333
Examples
Example #1: Convert 20 tbsp to teaspoon (us)
20 tbsp = 20 tbsp × (0.01478676478125/0.00492892159375) tsp = 60 tsp
20 tbsp = 20 tbsp ÷ 0.33333333333333 = 60 tsp
Example #2: Convert 50 tbsp to teaspoon (us)
50 tbsp = 50 tbsp × (0.01478676478125/0.00492892159375) tsp = 150 tsp
50 tbsp = 50 tbsp ÷ 0.33333333333333 = 150 tsp
Summary
To convert Tablespoon (US) to Teaspoon (US), multiply the value in tbsp by the ratio of liters per tbsp divided by liters per tsp. Equivalently: value_tsp = value_tbsp × (0.01478676478125 / 0.00492892159375). Numerically, 1 tbsp equals 3 tsp.
Relationship context
Both units are US customary fluid / volume in this tool’s grouping. Conversions use fixed liter equivalents, so factors are consistent for cooking, engineering, and cross-checking labels. The factor from Tablespoon (US) to Teaspoon (US) is 3.000000e+0 (1 tbsp = 3 tsp).
Conversion tables
| Tablespoon (US) (tbsp) | Teaspoon (US) (tsp) |
|---|---|
| 0.1 | 0.3 |
| 1 | 3 |
| 2 | 6 |
| 3 | 9 |
| 4 | 12 |
| 5 | 15 |
| 6 | 18 |
| 7 | 21 |
| 8 | 24 |
| 9 | 27 |
| Tablespoon (US) (tbsp) | Teaspoon (US) (tsp) |
|---|---|
| 10 | 30 |
| 20 | 60 |
| 30 | 90 |
| 40 | 120 |
| 50 | 150 |
| 60 | 180 |
| 70 | 210 |
| 80 | 240 |
| 90 | 270 |
| 100 | 300 |
Conversions outside the hub list
The grid on the category page lists hub units only. These pairs include at least one unit outside that hub set (same tools: formulas and tables on each page).
- us-tablespoon to uk-gallonTablespoon (US) to Gallon (UK)
- us-tablespoon to uk-quartTablespoon (US) to Quart (UK)
- us-tablespoon to uk-pintTablespoon (US) to Pint (UK)
- us-tablespoon to us-quartTablespoon (US) to Quart (US)
- us-tablespoon to us-pintTablespoon (US) to Pint (US)
- us-tablespoon to uk-cupTablespoon (US) to Cup (UK)
- us-tablespoon to us-cupTablespoon (US) to Cup (US)
- us-tablespoon to uk-fluid-ounceTablespoon (US) to Fluid Ounce (UK)
- us-tablespoon to uk-tablespoonTablespoon (US) to Tablespoon (UK)
- us-tablespoon to uk-teaspoonTablespoon (US) to Teaspoon (UK)
- uk-gallon to us-teaspoonGallon (UK) to Teaspoon (US)
- uk-quart to us-teaspoonQuart (UK) to Teaspoon (US)