Instant · Precise · Universal
47 units available
6 categories total
To liters: multiply by 10⁻¹⁵. To picoliters: divide by 1,000. To attoliters: multiply by 1,000.
1 fL = 10⁻¹⁵ L = 10⁻¹² mL = 1,000 aL = 1 µm³ (cubic micrometer).
For example, 1 Femtoliter (fL) = 1.689363e-13 Teaspoon (UK) (tsp (UK)).
| Femtoliter (fL) | Teaspoon (UK) (tsp (UK)) |
|---|---|
| 0.1 | 1.689363e-14 |
| 0.5 | 8.446816e-14 |
| 1 | 1.689363e-13 |
| 2 | 3.378727e-13 |
| 5 | 8.446816e-13 |
| 10 | 1.689363e-12 |
| 25 | 4.223408e-12 |
| 50 | 8.446816e-12 |
| 100 | 1.689363e-11 |
| 500 | 8.446816e-11 |
| 1000 | 1.689363e-10 |
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.
The UK teaspoon is a unit of culinary volume equal to approximately 5.919 milliliters, slightly larger than its US counterpart.
1 UK tsp ≈ 5.919 mL. Approximately 1.2 times the US teaspoon (4.929 mL).
To mL: multiply by 5.919. To US teaspoons: multiply by 1.201. To metric teaspoons: multiply by 1.184.
Traditional British recipes, Commonwealth cooking, and older pharmaceutical dosing in the UK.
The UK teaspoon is about 20% larger than the US teaspoon. A recipe calling for 5 UK teaspoons would need 6 US teaspoons.
Assuming UK and US teaspoons are the same — the UK teaspoon is about 20% larger. This matters in precise baking.
Modern UK recipes increasingly use metric (5 mL teaspoons). When following older UK recipes, a UK tsp ≈ 6 mL.



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