Mass Calculator

Calculate mass, density, or volume using the formula Mass = Density × Volume. Convert between units and reference common material densities.

Results

Mass

1 kg

1000 g

Pounds2.2046 lb
Ounces35.274 oz

What do you want to calculate?

Formula: Mass = Density × Volume

Enter Values

Results

Mass

1 kg

1000 g | 2.2046 lb

Density

1000 kg/m³

1 g/cm³

Volume

0.001 m³

1 L | 0.2642 gal

Common Material Densities

Click a material to use its density:

Mass Unit Conversions

UnitValue
Kilograms (kg)1
Grams (g)1000
Milligrams (mg)1.000e+6
Pounds (lb)2.2046
Ounces (oz)35.274
Metric Tons0.001

Quick Answer

Mass = Density x Volume (M = D x V). To calculate: multiply the density of the material by its volume. Example: Water (1 g/cm3) with 500 cm3 volume has mass = 1 x 500 = 500 grams. Unit conversions: 1 kg = 1000g = 2.205 lb. 1 lb = 453.6g = 16 oz. Remember: mass is not the same as weight (mass is constant, weight depends on gravity).

Key Facts

  • Mass = Density x Volume (M = D x V)
  • 1 kilogram = 1000 grams = 2.205 pounds
  • 1 pound = 453.592 grams = 16 ounces
  • 1 metric ton = 1000 kg = 2204.6 lb
  • Mass is constant everywhere; weight varies with gravity
  • Weight = Mass x Gravity (W = mg)
  • On Earth, 1 kg mass weighs 2.205 lb force
  • On Moon, same mass weighs 1/6 as much

Frequently Asked Questions

Mass = Density × Volume. For example, if you have 2 liters of water (density 1 g/cm³), the mass is 2 L × 1 kg/L = 2 kg. Make sure to use consistent units or convert them first.
Mass is the amount of matter in an object, measured in kilograms. Weight is the force of gravity on that mass, measured in newtons. On Earth, weight (N) = mass (kg) × 9.81 m/s². Mass stays constant; weight varies by location.
Density = Mass / Volume. Measure the object's mass with a scale. For volume, use water displacement: submerge the object and measure how much water is displaced. Divide mass by volume to get density.
Oil floats because it has a lower density than water. Water's density is about 1000 kg/m³, while most oils are around 800-920 kg/m³. Less dense substances float on more dense liquids.
Common densities in kg/m³: Water = 1000, Aluminum = 2700, Steel = 7850, Gold = 19300, Wood = 500-900, Concrete = 2400, Air = 1.2. These values help identify materials and calculate unknown masses or volumes.