Tablespoon (US) to Cup (UK) Converter
Volume · unit-converter
Convert Tablespoon (US) to Cup (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: Tablespoon (US) (tbsp)
To: Cup (UK) (ukcup)
About Tablespoon (US)
The US tablespoon is 1/2 US fluid ounce (about 14.7868 ml). US recipes use tablespoons for cooking volumes.
About Cup (UK)
The UK metric cup is often taken as 250 ml in modern recipes, though traditional imperial cups differ; this converter uses the liter-based UK cup factor from the shared table.
How to convert tablespoons (us) to cups (uk)
1 tablespoon (us) is equal to 0.05204213653931 cup (uk):
1 tbsp = (0.01478676478125 L ÷ 0.284130625 L) ukcup = 0.05204213653931 ukcup
Each tablespoon (us) is defined as 0.01478676478125 L and each cup (uk) as 0.284130625 L, so one tbsp equals 0.01478676478125 ÷ 0.284130625 ukcup = 0.05204213653931 ukcup.
Let V(tbsp) be the numeric value of the same volume measured in Tablespoon (US) (tbsp), and V(ukcup) the value in Cup (UK) (ukcup). Then:
V(ukcup) = V(tbsp) × (0.01478676478125 / 0.284130625)
Equivalently, divide by how many tbsp fit into one ukcup (liters per ukcup divided by liters per tbsp):
V(ukcup) = V(tbsp) ÷ 19.21519880807768
Or: cup (uk) = tablespoon (us) ÷ 19.21519880807768
Examples
Example #1: Convert 20 tbsp to cup (uk)
20 tbsp = 20 tbsp × (0.01478676478125/0.284130625) ukcup = 1.0408427308 ukcup
20 tbsp = 20 tbsp ÷ 19.21519880807768 = 1.0408427308 ukcup
Example #2: Convert 50 tbsp to cup (uk)
50 tbsp = 50 tbsp × (0.01478676478125/0.284130625) ukcup = 2.602106827 ukcup
50 tbsp = 50 tbsp ÷ 19.21519880807768 = 2.602106827 ukcup
Summary
To convert Tablespoon (US) to Cup (UK), multiply the value in tbsp by the ratio of liters per tbsp divided by liters per ukcup. Equivalently: value_ukcup = value_tbsp × (0.01478676478125 / 0.284130625). Numerically, 1 tbsp equals 0.0520421365393118 ukcup.
Relationship context
You are converting between US customary fluid / volume (Tablespoons (US)) and UK imperial fluid / volume (Cups (UK)). US and UK fluid measures differ (gallons, ounces, tablespoons); metric liters and cubic meters align with SI. The numeric factor used here is 5.204214e-2.
Conversion tables
| Tablespoon (US) (tbsp) | Cup (UK) (ukcup) |
|---|---|
| 0.1 | 0.0052042137 |
| 1 | 0.0520421365 |
| 2 | 0.1040842731 |
| 3 | 0.1561264096 |
| 4 | 0.2081685462 |
| 5 | 0.2602106827 |
| 6 | 0.3122528192 |
| 7 | 0.3642949558 |
| 8 | 0.4163370923 |
| 9 | 0.4683792289 |
| Tablespoon (US) (tbsp) | Cup (UK) (ukcup) |
|---|---|
| 10 | 0.5204213654 |
| 20 | 1.0408427308 |
| 30 | 1.5612640962 |
| 40 | 2.0816854616 |
| 50 | 2.602106827 |
| 60 | 3.1225281924 |
| 70 | 3.6429495578 |
| 80 | 4.1633709231 |
| 90 | 4.6837922885 |
| 100 | 5.2042136539 |