Teaspoon (US) to Teaspoon (UK) Converter
Volume · unit-converter
Convert Teaspoon (US) to Teaspoon (UK) 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: Teaspoon (US) (tsp)
To: Teaspoon (UK) (uktsp)
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.
About Teaspoon (UK)
The UK teaspoon is smaller than many US teaspoons; this tool uses the liter-based UK teaspoon factor from the shared table.
How to convert teaspoons (us) to teaspoons (uk)
1 teaspoon (us) is equal to 1.04084273078616 teaspoon (uk):
1 tsp = (0.00492892159375 L ÷ 0.004735510416667 L) uktsp = 1.04084273078616 uktsp
Each teaspoon (us) is defined as 0.00492892159375 L and each teaspoon (uk) as 0.004735510416667 L, so one tsp equals 0.00492892159375 ÷ 0.004735510416667 uktsp = 1.04084273078616 uktsp.
Let V(tsp) be the numeric value of the same volume measured in Teaspoon (US) (tsp), and V(uktsp) the value in Teaspoon (UK) (uktsp). Then:
V(uktsp) = V(tsp) × (0.00492892159375 / 0.004735510416667)
Equivalently, divide by how many tsp fit into one uktsp (liters per uktsp divided by liters per tsp):
V(uktsp) = V(tsp) ÷ 0.96075994040395
Or: teaspoon (uk) = teaspoon (us) ÷ 0.96075994040395
Examples
Example #1: Convert 20 tsp to teaspoon (uk)
20 tsp = 20 tsp × (0.00492892159375/0.004735510416667) uktsp = 20.8168546157 uktsp
20 tsp = 20 tsp ÷ 0.96075994040395 = 20.8168546157 uktsp
Example #2: Convert 50 tsp to teaspoon (uk)
50 tsp = 50 tsp × (0.00492892159375/0.004735510416667) uktsp = 52.0421365393 uktsp
50 tsp = 50 tsp ÷ 0.96075994040395 = 52.0421365393 uktsp
Summary
To convert Teaspoon (US) to Teaspoon (UK), multiply the value in tsp by the ratio of liters per tsp divided by liters per uktsp. Equivalently: value_uktsp = value_tsp × (0.00492892159375 / 0.004735510416667). Numerically, 1 tsp equals 1.040842730786163 uktsp.
Relationship context
You are converting between US customary fluid / volume (Teaspoons (US)) and UK imperial fluid / volume (Teaspoons (UK)). US and UK fluid measures differ (gallons, ounces, tablespoons); metric liters and cubic meters align with SI. The numeric factor used here is 1.040843e+0.
Conversion tables
| Teaspoon (US) (tsp) | Teaspoon (UK) (uktsp) |
|---|---|
| 0.1 | 0.1040842731 |
| 1 | 1.0408427308 |
| 2 | 2.0816854616 |
| 3 | 3.1225281924 |
| 4 | 4.1633709231 |
| 5 | 5.2042136539 |
| 6 | 6.2450563847 |
| 7 | 7.2858991155 |
| 8 | 8.3267418463 |
| 9 | 9.3675845771 |
| Teaspoon (US) (tsp) | Teaspoon (UK) (uktsp) |
|---|---|
| 10 | 10.4084273079 |
| 20 | 20.8168546157 |
| 30 | 31.2252819236 |
| 40 | 41.6337092314 |
| 50 | 52.0421365393 |
| 60 | 62.4505638472 |
| 70 | 72.858991155 |
| 80 | 83.2674184629 |
| 90 | 93.6758457708 |
| 100 | 104.084273079 |