Volume Unit Converters: Liters, Gallons and More

Convert between milliliters, liters, gallons, cubic feet, cubic meters, and other volume units. These tools help home cooks, students, laboratory users, and engineers compare capacities and measurements without doing the arithmetic by hand. Use Volume Unit Universal for direct conversions, or check the Volume Table to see equivalent values across units.Related tools cover practical uses of volume measurements. Volumetric Weight helps you estimate a package’s size-based shipping weight from its dimensions, while Cubic Feet per Minute (CFM) helps with airflow calculations for ventilation projects.

Cubic Feet per Minute (CFM)

Calculate airflow in cubic feet per minute (CFM) from air velocity in feet per minute (FPM) and cross-sectional area in square feet.

Volumetric Weight

Calculate a package’s volumetric weight in kilograms. Enter its length, width, and height in centimeters, then select the DIM Factor used for your shipment.

Rainfall Volume

Calculate how much water a rainfall event delivers onto any roof or surface. Enter the rainfall depth, collection area and an optional roof efficiency to get the volume in liters, US gallons and cubic meters.

Tank Volume

Calculate the total and filled volume of cylindrical, capsule, oval, rectangular and cone-bottom tanks. Enter the tank dimensions and the measured liquid depth to get the volume in liters, gallons, ft³ and m³, plus the fill percentage.

Volume Unit Universal

Convert a volume between liters, milliliters, cubic units, and US customary units. Enter a Value, then choose the From Unit and To Unit.

Cubic Yards

Calculate cubic yards for soil, gravel, mulch or concrete. Enter the area dimensions and depth, and get volume, weight, bag count and cost.

Cubic Feet

Calculate the volume in cubic feet of a box or room, cylinder, sphere, or a whole list of moving boxes. Enter dimensions in feet, inches, cm or m and get instant conversions to in³, m³, liters and gallons.

ml to oz

Convert milliliters to fluid ounces and back in one click — US customary, US nutrition-labeling or UK imperial ounces. Type a value in either field and get cups, tablespoons and teaspoons too.

Volume Table

Use this volume table to compare units such as cubic meters, liters, and gallons. Find your starting unit and the unit you want to convert to.

Calculators