Convert liters or milliliters to teaspoons, or teaspoons to liters, using US, metric or UK teaspoon sizes, with tablespoons and cups shown too.
L to Tsp Formula
- tsp = teaspoons in the chosen standard
- L = volume in liters
- mLper 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 a UK imperial teaspoon. To go the other way, multiply teaspoons by mLper 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; medication requires a calibrated dosing device and the medicine label’s units.
| Standard | mL per tsp | tsp per liter |
|---|---|---|
| US | 4.92892 | 202.884 |
| Metric | 5.00000 | 200.000 |
| UK imperial | 5.91939 | 168.936 |
| Liters | US tsp | Metric tsp | UK 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 UK imperial only for older British recipes that use the 5.91939 mL imperial teaspoon.
Are kitchen measuring spoons exact? Actual capacity varies by measure and fill level. Use a calibrated measuring tool and check its stated volume; household cutlery is not a precision measure.
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.
