Attoliter is 1e-18 liter units.
Attoliters to Teaspoons Converter — aL to tsp
Convert Attoliter (aL) to Teaspoon (tsp) using the exact conversion factor (1 attoliter = 2.028841e-16 teaspoon). See the formula, worked examples, conversion table, and common uses.
Attoliters to Teaspoons converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US teaspoon is one third of a US tablespoon.
Result = input x 1e-21 / 4.92892159e-6.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Attoliters to Teaspoons
Attoliter and Teaspoon appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Specifically: Attoliter is 1e-18 liter units, and a US teaspoon is one third of a US tablespoon.
Formula
teaspoons = attoliters × 2.028841e-16
This factor comes from each unit's defined relationship to the category's base unit: 1 attoliter equals 1e-21 base units, and 1 teaspoon equals 0.00000492892159375 base units, so dividing one by the other gives the direct attoliter-to-teaspoon factor of 2.028841e-16.
Simple example
1 aL × 2.028841e-16 = 2.028841e-16 tsp
1 attoliter = 2.028841e-16 teaspoons.
Real-world example
10 aL × 2.028841e-16 = 2.028841e-15 tsp
10 attoliters = 2.028841e-15 teaspoons.
Conversion table
| Attoliter (aL) | Teaspoon (tsp) |
|---|---|
| 1 aL | 2.028841e-16 tsp |
| 5 aL | 1.014421e-15 tsp |
| 10 aL | 2.028841e-15 tsp |
| 25 aL | 5.072103e-15 tsp |
| 50 aL | 1.014421e-14 tsp |
| 100 aL | 2.028841e-14 tsp |
Reverse conversion: Teaspoon to Attoliter
2.028841e-16 tsp × 4.928922e+15 = 0.9999998215 aL
2.028841e-16 teaspoons = 0.9999998215 attoliters.
attoliters = teaspoons × 4.928922e+15
For a page dedicated to this direction, see Teaspoon to Attoliter.
Understanding the Attoliter (aL)
Attoliter is 1e-18 liter units.
Understanding the Teaspoon
Teaspoon (tsp) measures volume. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 of a US cup. It is classified as a US customary unit.
Where it's used: United States (cooking and recipe measurement)
Uses of the Teaspoon today
- US recipe and cooking measurement for small quantities
- Medication dosing instructions in the US
- Baking measurement alongside the tablespoon and cup
Teaspoon — sources
- NIST Handbook 44, Appendix C — General tables of units including the US teaspoon definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many teaspoons are in 1 attoliter?
1 attoliter equals 2.028841e-16 teaspoons, using the exact defined conversion factor rather than an estimate.
How do I convert attoliter to teaspoon?
Multiply the attoliter value by 2.028841e-16. The converter above does this instantly to whatever precision you set.
How do I convert teaspoon back to attoliter?
Use the reverse factor: 1 teaspoon equals 4.928922e+15 attoliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a attoliter?
Attoliter (aL) is a unit of volume.
What is a teaspoon?
Teaspoon (tsp) measures volume. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 of a US cup. It is classified as a US customary unit.
Is the attoliter to teaspoon conversion exact?
Yes. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 of a US cup. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.