The Gasoline Density Calculator is a specialized tool that helps calculate the density of gasoline at different temperatures. It accounts for how gasoline expands or contracts with temperature changes, making it easier to obtain precise density values for practical and commercial uses.
This calculator belongs to the Fuel and Automotive calculator category. It is especially useful in industries like fuel transportation, storage, automotive engineering, and environmental monitoring. Users such as fuel station managers, chemical engineers, and vehicle designers use this tool to ensure fuel is measured and transferred with accuracy, which is important for pricing, engine performance, and regulatory compliance.
The calculator supports both metric units like kg/m³ and g/cm³ and includes formulas that adjust for temperature, as gasoline’s density varies with thermal conditions. With easy input fields and built-in constants, it simplifies complex calculations for both professionals and learners.
formula
Base Formula for Density at a Given Temperature
ρT = ρ15 − α × (T − 15)
Where:
ρT = Density of gasoline at temperature T (in kg/m³ or g/cm³)
ρ15 = Density at reference temperature 15°C (typically around 745–760 kg/m³)
α = Thermal expansion coefficient of gasoline (typically 0.00095 per °C)
T = Temperature in °C
This formula adjusts the standard gasoline density at 15°C for different ambient temperatures, which helps in volume correction and fuel management.
Convert Between Units
1 kg/m³ = 0.001 g/cm³
1 g/cm³ = 1000 kg/m³
To convert density manually:
ρ (g/cm³) = ρ (kg/m³) ÷ 1000
This conversion is useful when switching between engineering and laboratory unit systems.
Example Constant Values (Approximate)
ρ15 ≈ 750 kg/m³
α ≈ 0.00095 /°C
These constants are for regular gasoline. The actual value may differ depending on blend types, such as those containing ethanol or additives.
Alternative Formula (Density from Mass and Volume)
ρ = m / V
Where:
ρ = Density (kg/m³ or g/cm³)
m = Mass of gasoline (in kg or g)
V = Volume of gasoline (in m³ or cm³)
This method is useful when physical measurements are available, like weighing a sample and measuring its volume.
Gasoline Density Quick Reference Table
| Term or Condition | Typical Value or Conversion |
|---|---|
| Density at 15°C | 745–760 kg/m³ |
| Thermal expansion coefficient (α) | 0.00095 /°C |
| Density of gasoline in g/cm³ | 0.745–0.760 g/cm³ |
| Conversion: 1 kg/m³ to g/cm³ | ÷1000 |
| Temperature reference | 15°C (standard in many regions) |
| Ethanol-blended gasoline (E10) | Slightly lower density (~740 kg/m³) |
| Diesel comparison | 820–845 kg/m³ |
| Water density (reference) | 1000 kg/m³ (used for calibration) |
This table provides a quick summary for users to understand gasoline density under various conditions without running full calculations.
Example
Let’s say you want to calculate the density of gasoline at 30°C. The known values are:
ρ15 = 750 kg/m³
α = 0.00095 /°C
T = 30°C
Step 1: Use the base formula
ρT = ρ15 − α × (T − 15)
ρT = 750 − 0.00095 × (30 − 15) × 750
Step 2: Calculate the difference
Change = 0.00095 × 15 = 0.01425
Density drop = 750 × 0.01425 = 10.6875
Step 3: Final density
ρT = 750 − 10.6875 = 739.31 kg/m³
So, at 30°C, the gasoline density is approximately 739.31 kg/m³.
Most Common FAQs
Gasoline expands as temperature increases, making it less dense. This change affects volume and mass calculations. Accurate density is important for pricing, engine efficiency, and safety.
Yes, but you should adjust the reference density (ρ15) based on the blend. Ethanol-blended fuels like E10 generally have a lower density than pure gasoline.
No, gasoline is lighter than water. Its density is around 750 kg/m³, while water is 1000 kg/m³. This is why gasoline floats on water in case of spills.