20.9 tsp ≈ 0.435417 cup (Imperial; in US cups: 20.9 tsp = 0.522914 US cup). To convert teaspoons to cups, multiply by 0.020833344: 20.9 × 0.020833344 = 0.435417.
How to convert teaspoons to cups
cup = tsp × 0.020833344
- 1 tsp = 0.020833344 cup (and 1 cup = 47.999976 tsp).
- Multiply the amount by the factor: 20.9 × 0.020833344 = 0.435417.
- Answer: 20.9 tsp ≈ 0.435417 cup (rounded to 6 significant figures).
Teaspoons to Cups table
| Teaspoons (tsp) | Cups (cup) |
|---|---|
| 20.4 tsp | 0.425 cup |
| 20.5 tsp | 0.427084 cup |
| 20.6 tsp | 0.429167 cup |
| 20.7 tsp | 0.43125 cup |
| 20.8 tsp | 0.433334 cup |
| 20.9 tsp | 0.435417 cup |
| 21 tsp | 0.4375 cup |
| 21.1 tsp | 0.439584 cup |
| 21.2 tsp | 0.441667 cup |
| 21.3 tsp | 0.44375 cup |
| 21.4 tsp | 0.445834 cup |
| tsp | cup |
|---|---|
| 1 tsp | 0.0208333 cup |
| 5 tsp | 0.104167 cup |
| 10 tsp | 0.208333 cup |
| 50 tsp | 1.0417 cup |
| 100 tsp | 2.0833 cup |
| 1,000 tsp | 20.8333 cup |
Good to know
The tsp here is the Imperial (UK) teaspoon: 1 tsp = 0.00591939 L. A US teaspoon is 0.00492892 L.
In US teaspoons: 20.9 US tsp = 0.36256 cup.
The cup here is the Imperial (UK) cup: 1 cup = 0.28413 L. A US cup is 0.236588 L.
In US cups: 20.9 tsp = 0.522914 US cup.