Milliliter is 0.001 liter units.
Milliliters to Zeptoliters Converter — mL to zL
Convert Milliliter (mL) to Zeptoliter (zL) using the exact conversion factor (1 milliliter = 1e+18 zeptoliter). See the formula, worked examples, conversion table, history, and common uses.
Milliliters to Zeptoliters 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.
Zeptoliter is 1e-21 liter units.
Result = input x 1e-6 / 1e-24.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Milliliters to Zeptoliters
Milliliter and Zeptoliter 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. Milliliter is most often used for medicine dosing (worldwide, including in the us).
Formula
zeptoliters = milliliters × 1e+18
This factor comes from each unit's defined relationship to the category's base unit: 1 milliliter equals 0.000001 base units, and 1 zeptoliter equals 1e-24 base units, so dividing one by the other gives the direct milliliter-to-zeptoliter factor of 1e+18.
Simple example
1 mL × 1e+18 = 1e+18 zL
1 milliliter = 1e+18 zeptoliters.
Real-world example
10 mL × 1e+18 = 1e+19 zL
10 milliliters = 1e+19 zeptoliters.
Conversion table
| Milliliter (mL) | Zeptoliter (zL) |
|---|---|
| 1 mL | 1e+18 zL |
| 5 mL | 5e+18 zL |
| 10 mL | 1e+19 zL |
| 25 mL | 2.5e+19 zL |
| 50 mL | 5e+19 zL |
| 100 mL | 1e+20 zL |
Reverse conversion: Zeptoliter to Milliliter
1e+18 zL × 1e-18 = 1 mL
1e+18 zeptoliters = 1 milliliter.
milliliters = zeptoliters × 1e-18
For a page dedicated to this direction, see Zeptoliter to Milliliter.
Understanding the Milliliter
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small-volume unit worldwide
Uses of the Milliliter today
- Medicine dosing (worldwide, including in the US)
- Cooking and recipe measurement outside the US
- Beverage and small-container labeling
History of the Milliliter
The milliliter follows directly from the liter via the 'milli-' SI prefix. It is notable as one of the few metric units in routine US use, since medicine dosing (syringes, liquid medication) is specified in milliliters even in the US.
Historical origin. Milliliter was not the invention of a single named person; it developed through the process described above.
Understanding the Zeptoliter (zL)
Zeptoliter is 1e-21 liter units.
Milliliter — sources
- BIPM SI Brochure — SI prefixes — Defines 'milli-' as the prefix for 10⁻³.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptoliters are in 1 milliliter?
1 milliliter equals 1e+18 zeptoliters, using the exact defined conversion factor rather than an estimate.
How do I convert milliliter to zeptoliter?
Multiply the milliliter value by 1e+18. The converter above does this instantly to whatever precision you set.
How do I convert zeptoliter back to milliliter?
Use the reverse factor: 1 zeptoliter equals 1e-18 milliliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a milliliter?
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
What is a zeptoliter?
Zeptoliter (zL) is a unit of volume.
Is the milliliter to zeptoliter conversion exact?
Yes. Both milliliter and zeptoliter are defined by fixed standards rather than physical artifacts, so the factor of 1e+18 used above is exact to as many digits as you choose to display.
Where is the milliliter still used today?
Standard small-volume unit worldwide