Volume Conversion Guide: How to Convert Liters, Milliliters, Gallons, Cups and More

Volume conversion is the process of changing a measurement from one volume unit into another equivalent unit.

The numerical value changes when the unit changes, but the actual amount of space being measured remains the same.

The MartTools Unit Converter supports milliliters (ml), liters (l), cubic meters (m³), US gallons (gal), US quarts (qt), US pints (pt), cups, US fluid ounces (fl oz), tablespoons (tbsp) and teaspoons (tsp).

These units cover common metric, US customary and everyday kitchen volume measurements.

Milliliters and liters are metric units of volume. A liter is larger than a milliliter, so the same volume has a smaller numerical value when expressed in liters than when expressed in milliliters.

For example, when converting a measurement from liters to milliliters, the numerical value increases because the milliliter is the smaller unit.

Liters and cubic meters are both metric volume units, but they are commonly used at different scales.

Liters are convenient for many everyday measurements, while cubic meters are useful for larger volumes. The Unit Converter can convert between liters and cubic meters along with the other supported volume units.

Liters and US gallons belong to different measurement systems. Converting between them is useful when a volume is provided in metric units but needs to be expressed using US customary units.

Select liters as the From unit and US gallons as the To unit, then enter the value you want to convert.

The reverse conversion changes US gallons into liters. Select US gallons as the From unit and liters as the To unit.

This is useful when comparing measurements that use US customary and metric volume units.

US quarts, US pints and cups are smaller volume units that are often encountered in everyday measurements.

The MartTools Unit Converter supports these units individually, allowing you to convert between them or use them as part of a conversion to another supported volume unit.

US fluid ounces, tablespoons and teaspoons are commonly used for smaller volume measurements.

Select the appropriate unit as the From or To unit to convert measurements between these units and the other available volume units.

First identify the unit used by the original measurement. Select that unit as the From unit in the Unit Converter.

Next select the unit you want as the result. Enter the numerical value and the converter will calculate the equivalent volume.

For example, to convert liters to milliliters, select liters as the From unit and milliliters as the To unit.

The volume category combines metric units such as milliliters, liters and cubic meters with US customary units such as gallons, quarts, pints, cups and fluid ounces.

When converting between measurement systems, always check which type of gallon, quart, pint or fluid ounce is being used. The MartTools volume converter uses the US units listed in its supported unit definitions.

Volume conversions can become inconvenient when measurements use different unit systems or when several conversions are needed at once.

An online converter performs the calculation automatically and reduces the need to remember individual conversion factors.

The MartTools Unit Converter also lets you switch the From and To units using its swap control.

Always check the original unit and the resulting unit when reviewing a conversion. A numerical value without its unit does not fully describe a volume measurement.

For practical calculations, make sure the converted value has the precision appropriate for the task.