Density Calculator
Calculate the density of any substance by entering its mass and volume. Density is the key that connects mass and volume conversions.
What Does Density Look Like?
Compare how different densities affect the mass-volume relationship
Each bar shows density in g/mL — higher density means more mass per unit volume
Density Formula
SI Units
In the International System of Units (SI), density is measured in kilograms per cubic meter (kg/m³). In everyday science and chemistry, grams per milliliter (g/mL) or grams per cubic centimeter (g/cm³) are more commonly used. Since 1 mL = 1 cm³, these two units are interchangeable.
Density Formula Triangle
A simple visual trick to remember how to rearrange the density formula
Cover D → Mass over Volume gives Density
Cover M → Density times Volume gives Mass
Cover V → Mass over Density gives Volume
Density Units Explained
Common units used to express density across different fields
| Unit | Meaning |
|---|---|
| g/mL | Grams per milliliter — most common in chemistry labs |
| kg/m³ | Kilograms per cubic meter — the SI standard unit |
| g/cm³ | Grams per cubic centimeter — identical to g/mL |
| lb/ft³ | Pounds per cubic foot — used in US engineering |
Density Calculator Examples
See the density formula in action with step-by-step calculations
Density Practice Problems
Try solving these density problems, then reveal the answer
A liquid has a mass of 200 g and occupies a volume of 100 mL. What is its density?
Density = Mass ÷ Volume
Density = 200 g ÷ 100 mL
Density = 2 g/mL
A metal cube has a mass of 540 g and a volume of 200 cm³. Calculate its density.
Density = Mass ÷ Volume
Density = 540 g ÷ 200 cm³
Density = 2.7 g/cm³ (aluminum)
A gas fills a 500 mL container and has a mass of 0.65 g. What is its density?
Density = Mass ÷ Volume
Density = 0.65 g ÷ 500 mL
Density = 0.0013 g/mL
Applications of Density
Density plays a vital role across many industries and everyday life
Density in Medicine
Medical professionals use density to analyze body fluids like blood and urine. A urine density test (specific gravity) helps diagnose dehydration, kidney disease, and diabetes insipidus. Bone density scans (DEXA) measure how much mineral content is in bones to detect osteoporosis. IV fluid preparation also relies on precise density calculations.
Density in Cooking
In baking and cooking, density determines how ingredients are measured by volume vs. weight. A cup of flour (≈0.59 g/mL) weighs much less than a cup of honey (≈1.42 g/mL). Understanding density helps bakers convert recipes between metric and imperial, and explains why oil floats on water-based sauces and vinaigrettes.
Density in Engineering
Engineers select materials based on density for structural and aerospace applications. Aluminum (2.7 g/cm³) is preferred over steel (7.8 g/cm³) in aircraft because it's lighter. Naval architects design ship hulls so the average density of the vessel is less than water, ensuring buoyancy. Civil engineers consider soil density for foundation stability.
Density in Chemistry
Chemists use density to identify unknown substances, verify solution concentrations, and calculate molar volumes. Density columns — layered liquids of different densities — are used to separate mixtures. In titration, density helps convert between mass and volume of reagents for precise stoichiometric calculations.
Density in Manufacturing
Quality control teams measure product density to ensure consistency in food, beverage, pharmaceutical, and material production. For example, the density of a plastic batch reveals whether the correct polymer blend was used. In metalworking, density checks detect porosity or voids in cast parts that could compromise structural integrity.
Density Conversion Tool
Instantly convert between common density units
Understanding Density
Density is a fundamental physical property that describes how much mass is contained in a given volume. It is the bridge between mass and volume measurements.
The Formula
Step-by-Step Example
Finding the density of an unknown liquid — 85 g in 100 mL:
- Measure the mass: 85 g
- Measure the volume: 100 mL
- Divide: 85 ÷ 100 = 0.850 g/mL
The substance has a density of 0.850 g/mL, which is close to sugar.
If you only have one measurement, use the volume to density calculator or the mass to density calculator instead. To skip the math entirely, look up a known value in our liquid density lookup. Once you have a density, apply it in the milliliters to milligrams tool or the main mL to mg converter.
Why Is Density Important?
- Identification — Density helps identify unknown substances in the lab.
- Quality control — Manufacturing uses density to verify product consistency.
- Conversions — Density is required for any mass ↔ volume conversion.
- Buoyancy — Density determines whether objects float or sink.
Related Converters
Other conversions you may find useful.
Density of Common Materials
Reference table of densities for everyday substances and engineering materials
| Material | Density (g/mL) | Density (kg/m³) | Category |
|---|---|---|---|
| Air (at sea level) | 0.001225 | 1.225 | Gas |
| Styrofoam | 0.030 | 30 | Solid |
| Cork | 0.120 | 120 | Solid |
| Pine Wood | 0.510 | 510 | Solid |
| Flour | 0.593 | 593 | Powder |
| Ethanol | 0.789 | 789 | Liquid |
| Vegetable Oil | 0.910 | 910 | Liquid |
| Olive Oil | 0.918 | 918 | Liquid |
| Ice | 0.917 | 917 | Solid |
| Water | 1.000 | 1000 | Liquid |
| Milk | 1.030 | 1030 | Liquid |
| Seawater | 1.025 | 1025 | Liquid |
| Sugar | 1.550 | 1550 | Solid |
| Honey | 1.420 | 1420 | Liquid |
| Salt | 2.165 | 2165 | Solid |
| Glass | 2.500 | 2500 | Solid |
| Aluminum | 2.700 | 2700 | Metal |
| Concrete | 2.400 | 2400 | Solid |
| Titanium | 4.507 | 4507 | Metal |
| Iron / Steel | 7.874 | 7874 | Metal |
| Copper | 8.960 | 8960 | Metal |
| Lead | 11.340 | 11340 | Metal |
| Mercury | 13.534 | 13534 | Liquid |
| Gold | 19.320 | 19320 | Metal |
Conversion Tools
Choose the right converter for your needs.
mg to mL Converter
Convert milligrams to milliliters. Find volume from mass with density.
mL to Grams Converter
Convert milliliters to grams using substance density. Perfect for cooking and lab work.
mL to Kilograms Converter
Convert milliliters to kilograms. Ideal for large-volume industrial conversions.
mL to Pounds Converter
Convert milliliters to pounds. Bridge metric volume to imperial weight instantly.
mL to Liters Converter
Convert milliliters to liters. Simple volume unit conversion — no density needed.
Volume to Mass Converter
Convert volume (mL) to mass (mg) using density. Essential for lab and kitchen.
Mass to Volume Converter
Convert mass (mg) to volume (mL) using density. Find how much space your substance takes.
Density Calculator
Calculate density from mass and volume. The key to all mass-volume conversions.
Volume to Density
Find density when you know volume and mass. Identify unknown substances.
Density to Volume
Calculate volume from density and mass. Find container size needed.
Mass to Density Converter
Calculate density from mass and volume. Determine substance identity from measurements.
Density to Mass Converter
Calculate mass from density and volume. Find the weight of any liquid instantly.
mL to Ounces Converter
Convert milliliters to fluid ounces. Bridge metric and imperial volume units.
Liquid Density Lookup
Search density values for 100+ common liquids. Reference tool for conversions.
Normality Calculator
Calculate normality (N) from molarity, equivalent weight, and volume for chemistry.
Density Calculator FAQ
Common questions about calculating density.
Density is a measure of how much mass is packed into a given volume. It is calculated by dividing mass by volume: Density = Mass ÷ Volume. Common units are grams per milliliter (g/mL) or kilograms per liter (kg/L).
The density of pure water at 4 °C is exactly 1.000 g/mL (or 1 kg/L). This makes water the standard reference — substances denser than 1.0 sink in water, and less dense substances float.
Yes. Most substances expand when heated, which increases volume while mass stays constant — lowering the density. Water is unusual: its maximum density occurs at 4 °C, not at 0 °C. For most everyday conversions, room temperature density values are accurate enough.
Yes. Density applies to solids, liquids, and gases. For solids, you'd measure the mass on a scale and determine volume by water displacement or geometric calculation. The formula is the same: Density = Mass ÷ Volume.
Specific gravity is a dimensionless ratio — it compares a substance's density to water's density. Since water's density is 1.000 g/mL, the numerical value of specific gravity equals the density in g/mL. The difference is that specific gravity has no units.