The teaspoon
The US teaspoon equals 1/3 of a US tablespoon, or about 4.929 mL. The metric teaspoon (used on most non-US nutrition labels) is exactly 5 mL — close enough that you can substitute freely in cooking but not in precise dosing.
Teaspoons to Liters Converter
1 tsp = 0.00492892 L (teaspoon → liter)
1 tsp = 0.00492892 L
1 teaspoon equals 0.00492892 liters. To convert teaspoons to liters, multiply the teaspoon value by 0.00492892. For quick reference: 1 tsp = 0.00492892 L, 5 tsp = 0.0246446 L, 10 tsp = 0.0492892 L, 100 tsp = 0.492892 L.
Formula
Liters = Teaspoons × 0.00492892Quick
When to use teaspoons → liters
US teaspoons to litres multiplies by 0.00492892159375 (exact). A recipe totalling 20 tsp of assorted flavourings uses 0.0986 L; 203 teaspoons make a litre (202.884 to be precise). The conversion turns per-teaspoon dosing into metric purchasing quantities — extracts, medicines, concentrated sauces. Cooking and pharmacy treat the teaspoon as a rounded 5 mL, which would make 200 tsp exactly one litre; the 1.4 % gap versus the customary 4.929 mL spoon rarely matters in the kitchen but does in dosing.
Aquarium and hydroponics dosing charts that specify nutrient additive rates per teaspoon get scaled up to a litre-based reservoir size using this conversion. 1 tsp is 0.00493 L; 50 tsp is 0.246 L; 200 tsp is 0.986 L. Because hydroponic reservoirs are usually sized in whole litres, growers typically work backward from this conversion to figure how many teaspoons of concentrate a given reservoir needs at a fixed parts-per-litre ratio.
How to convert teaspoons to liters
Take your value
Start with your value in teaspoons.
Multiply by 0.00492892
Multiply the teaspoon value by 0.00492892. This is the exact conversion factor from teaspoons to liters.
Read the result
The product is your value in liters. For example, 5 tsp × 0.00492892 = 0.0246446 L.
Conversion formula
The exact factor from teaspoons to liters is 0.00492892.
Liters = Teaspoons × 0.00492892
Teaspoons to Liters conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Teaspoons (tsp) | Liters (L) |
|---|---|
| 0.1 tsp | 0.00049289 L |
| 0.25 tsp | 0.0012322 L |
| 0.5 tsp | 0.0024645 L |
| 1 tsp | 0.0049289 L |
| 1.5 tsp | 0.0073934 L |
| 2 tsp | 0.0098578 L |
| 2.5 tsp | 0.012322 L |
| 3 tsp | 0.014787 L |
| 4 tsp | 0.019716 L |
| 5 tsp | 0.024645 L |
| 6 tsp | 0.029574 L |
| 7 tsp | 0.034502 L |
| 8 tsp | 0.039431 L |
| 9 tsp | 0.04436 L |
| 10 tsp | 0.049289 L |
| 12 tsp | 0.059147 L |
| 15 tsp | 0.073934 L |
| 20 tsp | 0.098578 L |
| 25 tsp | 0.12322 L |
| 30 tsp | 0.14787 L |
| 40 tsp | 0.19716 L |
| 50 tsp | 0.24645 L |
| 60 tsp | 0.29574 L |
| 75 tsp | 0.36967 L |
| 100 tsp | 0.49289 L |
| 125 tsp | 0.61612 L |
| 150 tsp | 0.73934 L |
| 200 tsp | 0.98578 L |
| 250 tsp | 1.2322 L |
| 300 tsp | 1.4787 L |
| 400 tsp | 1.9716 L |
| 500 tsp | 2.4645 L |
| 600 tsp | 2.9574 L |
| 750 tsp | 3.6967 L |
| 1000 tsp | 4.9289 L |
| 1500 tsp | 7.3934 L |
| 2000 tsp | 9.8578 L |
| 2500 tsp | 12.322 L |
| 3000 tsp | 14.787 L |
| 4000 tsp | 19.716 L |
| 5000 tsp | 24.645 L |
| 7500 tsp | 36.967 L |
| 10000 tsp | 49.289 L |
| 15000 tsp | 73.934 L |
| 20000 tsp | 98.578 L |
| 25000 tsp | 123.22 L |
| 30000 tsp | 147.87 L |
| 40000 tsp | 197.16 L |
| 50000 tsp | 246.45 L |
| 100000 tsp | 492.89 L |
Real-world reference
A standard pinch of salt is about 1/8 tsp. Most spice measurements in recipes are in teaspoons.
Frequently asked questions
- How many liters are in 1 teaspoon?
- 1 teaspoon equals 0.00492892 liters.
- How do I convert teaspoons to liters?
- Multiply the teaspoon value by 0.00492892. So x tsp × 0.00492892 = the equivalent in L.
- What is 5 teaspoons in liters?
- 5 teaspoons equals 0.0246446 liters.
- What is 10 teaspoons in liters?
- 10 teaspoons equals 0.0492892 liters.
- What is 100 teaspoons in liters?
- 100 teaspoons equals 0.492892 liters.
- How do I convert back from liters to teaspoons?
- Multiply the liter value by 202.884. For example, 1 L = 202.884 tsp.
- Is the teaspoon bigger than the liter?
- No. 1 teaspoon is smaller than 1 liter. It takes 202.884 teaspoons to equal 1 liter.
- Are these conversion factors exact?
- The factor is derived directly from the SI definitions of teaspoon and liter; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.
About the teaspoon and the liter
The liter
The liter (L) is a metric unit of volume defined as exactly one cubic decimeter (1 dm³). Although not an SI base unit (the SI unit of volume is the cubic meter), it is the most common metric volume unit in everyday life, used for beverages, fuel, and chemistry. One liter of pure water at 4 °C weighs almost exactly one kilogram.
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