Fuel Energy Density Converter
Convert between different units of energy content in fuels and compare various energy sources
Fuel Energy Density Converter
Selecting a fuel will update the input value to its typical energy density in MJ/kg
The SI unit for energy density by mass. Commonly used in scientific and engineering contexts for comparing fuels and energy storage.
The imperial/US customary unit for energy density. Commonly used in US industries and for heating values.
Conversion Formula:
BTU/lb = MJ/kg × 430.5
Common Energy Density Conversions
Energy Content Comparison
1 kilogram of this fuel contains approximately:
Applications of Energy Density
Transportation
- Vehicle range calculations
- Fuel efficiency comparisons
- Alternative fuel evaluations
- Aircraft payload vs. range analysis
- Spacecraft propellant selection
Energy Storage
- Battery technology selection
- Renewable energy storage sizing
- Grid storage requirements
- Backup power system design
- Mobile device energy capacity
Power Generation
- Fuel selection for power plants
- Heating system efficiency comparisons
- Biomass energy potential assessment
- Waste-to-energy conversion planning
- Cogeneration system design
Environmental Analysis
- Carbon footprint calculations
- Emissions reduction strategies
- Energy transition planning
- Life cycle analysis
- Resource utilization efficiency
Key Concepts in Energy Density
Gravimetric vs. Volumetric Energy Density
Energy density can be measured by mass (MJ/kg) or volume (MJ/L). Gravimetric (mass-based) is important for transportation applications, while volumetric matters where storage space is limited.
Energy Carriers vs. Energy Sources
Fuels like hydrogen and batteries are energy carriers, not primary energy sources. Their overall efficiency depends on how the energy was generated and stored initially.
Higher vs. Lower Heating Value
The Higher Heating Value (HHV) includes the energy from condensing water vapor produced during combustion, while the Lower Heating Value (LHV) doesn't. The distinction matters for efficiency calculations.
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Energy Density Scale
This logarithmic scale shows where this fuel's energy density falls compared to common fuels
Current Value
42.0 MJ/kg
Similar Fuel
Biodiesel
What This Energy Could Power
Energy Density Ranking
| Fuel Type | MJ/kg | Source |
|---|---|---|
| Hydrogen | 120 | Renewable/Fossil |
| Natural Gas (Methane) | 55 | Fossil |
| Propane | 49 | Fossil |
| Gasoline | 46 | Fossil |
| Diesel | 45 | Fossil |
| Jet Fuel (Kerosene) | 43 | Fossil |
| Biodiesel | 42 | Renewable |
| Coal (Bituminous) | 30 | Fossil |
| Ethanol | 29 | Renewable |
| Methanol | 22 | Fossil/Renewable |
| Wood Pellets | 18 | Renewable |
| Wood (Dry) | 16 | Renewable |
| Lithium-ion Battery | 0.9 | Electric |
| Lead Acid Battery | 0.17 | Electric |
About the Fuel Energy Density Converter
Convert between different units of energy content in fuels and compare various energy sources All conversions run instantly in your browser and nothing you enter is sent to a server.
Common Conversion Formulas
| From | To | Formula |
|---|---|---|
| Energy Density by Mass (MJ/kg) | Energy Density by Volume (MJ/L) | MJ/L = (MJ/kg) × Density (kg/L) |
| Kilowatt-hours per kilogram (kWh/kg) | Megajoules per kilogram (MJ/kg) | MJ/kg = kWh/kg × 3.6 |
| BTU per gallon | Megajoules per liter (MJ/L) | MJ/L = BTU/gal × 0.0002791 |