Convert liters, milliliters, and teaspoons between US, metric, and imperial standards with results in cups and tablespoons for cooking.
L to Tsp Formula
tsp = (L * 1000) / mL_per_tsp
- tsp = teaspoons in the chosen standard
- L = volume in liters
- mL_per_tsp = milliliters per teaspoon for the standard you pick
Use 4.92892 mL for a US teaspoon, 5 mL for a metric teaspoon, or 5.91939 mL for an imperial teaspoon. To go the other way, multiply teaspoons by mL_per_tsp and divide by 1000 to get liters.
Reference Tables
Teaspoon size depends on the standard. Pick one and stick with it for the whole recipe or dose.
| Standard | mL per tsp | tsp per liter |
|---|---|---|
| US | 4.92892 | 202.884 |
| Metric | 5.00000 | 200.000 |
| Imperial (UK) | 5.91939 | 168.936 |
| Liters | US tsp | Metric tsp | Imperial tsp |
|---|---|---|---|
| 0.1 | 20.29 | 20.00 | 16.89 |
| 0.25 | 50.72 | 50.00 | 42.23 |
| 0.5 | 101.44 | 100.00 | 84.47 |
| 1 | 202.88 | 200.00 | 168.94 |
| 2 | 405.77 | 400.00 | 337.87 |
Worked Examples and FAQ
Example 1. Convert 0.75 L to US teaspoons. 0.75 × 1000 = 750 mL. 750 ÷ 4.92892 = 152.16 US tsp.
Example 2. Convert 300 metric tsp to liters. 300 × 5 = 1500 mL = 1.5 L.
Which teaspoon should you use? Use US for American recipes, metric for European recipes and most measuring spoons sold today, and imperial only when a UK source explicitly says so.
Are kitchen measuring spoons exact? No. A standard set is calibrated to roughly 5 mL, but fill level and spoon shape can shift the actual volume by 5 to 10 percent.
Does this work for medicine? Use a marked oral syringe or dosing cup in mL for medication. Kitchen teaspoons are not accurate enough for dosing.
