Kiloliter is 1000 liter units.
Kiloliters to Attoliters Converter — kL to aL
Convert Kiloliter (kL) to Attoliter (aL) using the exact conversion factor (1 kiloliter = 1e+21 attoliter). See the formula, worked examples, and conversion table.
Kiloliters to Attoliters 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.
Attoliter is 1e-18 liter units.
Result = input x 1 / 1e-21.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kiloliters to Attoliters
Kiloliter and Attoliter 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: Kiloliter is 1000 liter units, and attoliter is 1e-18 liter units.
Formula
attoliters = kiloliters × 1e+21
This factor comes from each unit's defined relationship to the category's base unit: 1 kiloliter equals 1 base unit, and 1 attoliter equals 1e-21 base units, so dividing one by the other gives the direct kiloliter-to-attoliter factor of 1e+21.
Simple example
1 kL × 1e+21 = 1e+21 aL
1 kiloliter = 1e+21 attoliters.
Real-world example
10 kL × 1e+21 = 1e+22 aL
10 kiloliters = 1e+22 attoliters.
Conversion table
| Kiloliter (kL) | Attoliter (aL) |
|---|---|
| 1 kL | 1e+21 aL |
| 5 kL | 5e+21 aL |
| 10 kL | 1e+22 aL |
| 25 kL | 2.5e+22 aL |
| 50 kL | 5e+22 aL |
| 100 kL | 1e+23 aL |
Reverse conversion: Attoliter to Kiloliter
1e+21 aL × 1e-21 = 1 kL
1e+21 attoliters = 1 kiloliter.
kiloliters = attoliters × 1e-21
For a page dedicated to this direction, see Attoliter to Kiloliter.
Understanding the Kiloliter (kL)
Kiloliter is 1000 liter units.
Understanding the Attoliter (aL)
Attoliter is 1e-18 liter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attoliters are in 1 kiloliter?
1 kiloliter equals 1e+21 attoliters, using the exact defined conversion factor rather than an estimate.
How do I convert kiloliter to attoliter?
Multiply the kiloliter value by 1e+21. The converter above does this instantly to whatever precision you set.
How do I convert attoliter back to kiloliter?
Use the reverse factor: 1 attoliter equals 1e-21 kiloliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a kiloliter?
Kiloliter (kL) is a unit of volume.
What is a attoliter?
Attoliter (aL) is a unit of volume.
Is the kiloliter to attoliter conversion exact?
Yes. Both kiloliter and attoliter are defined by fixed standards rather than physical artifacts, so the factor of 1e+21 used above is exact to as many digits as you choose to display.