Instant · Precise · Universal
47 units available
6 categories total
To mL: multiply by 4.929. To UK teaspoons: multiply by 0.832674. To tablespoons (US): divide by 3.
1 US tsp = 1/3 US tbsp = 1/6 US fl oz = 1/48 US cup ≈ 4.929 mL.
For example, 1 Teaspoon (US) (tsp (US)) = 4.928922e+12 Femtoliter (fL).
| Teaspoon (US) (tsp (US)) | Femtoliter (fL) |
|---|---|
| 0.1 | 492892159000 |
| 0.5 | 2.464461e+12 |
| 1 | 4.928922e+12 |
| 2 | 9.857843e+12 |
| 5 | 2.464461e+13 |
| 10 | 4.928922e+13 |
| 25 | 1.232230e+14 |
| 50 | 2.464461e+14 |
| 100 | 4.928922e+14 |
| 500 | 2.464461e+15 |
| 1000 | 4.928922e+15 |
The US teaspoon is a unit of culinary volume equal to 1/3 of a US tablespoon, or approximately 4.929 milliliters.
1 US tsp = 1/3 US tbsp = 1/6 US fl oz = 1/48 US cup ≈ 4.929 mL.
To mL: multiply by 4.929. To UK teaspoons: multiply by 0.832674. To tablespoons (US): divide by 3.
Cooking and baking recipes, measuring medicine doses, adding spices, sugar or salt, and child medication dosing.
The US teaspoon is slightly smaller than the metric teaspoon (5 mL). The phrase 'a teaspoon of sugar' equals about 4 grams.
Using a regular eating spoon instead of a measuring teaspoon — actual teaspoons vary widely. Always use a calibrated spoon.
3 tsp = 1 tbsp. 48 tsp = 1 cup. For mL conversion, remember 1 tsp ≈ 5 mL (the metric teaspoon is exactly 5 mL).
The femtoliter is a unit of volume equal to 10⁻¹⁵ liters, or one quadrillionth of a liter.
1 fL = 10⁻¹⁵ L = 10⁻¹² mL = 1,000 aL = 1 µm³ (cubic micrometer).
To liters: multiply by 10⁻¹⁵. To picoliters: divide by 1,000. To attoliters: multiply by 1,000.
Measuring red blood cell volumes (normal MCV: 80–100 fL), inkjet droplet sizes, and flow cytometry particle analysis.
A human red blood cell has a volume of about 90 fL. The smallest inkjet droplets are in the range of 1–5 fL.
Assuming fL is too small to be practical — it is actually the standard unit used on every complete blood count (CBC) lab report.
Remember: fL = femtoliter, the volume of blood cells. Normal MCV range: 80–100 fL. It's a key clinical measurement.



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