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LPG ↔ natural gas converter — kg, m³ and calorific value
Reference conditions
Gas volume depends on temperature. 15 °C matches the installer rule (1 kg propane ≈ 0.54 m³); 0 °C is normal conditions (Nm³). The m³↔m³ energy comparison is independent of this choice.Energy comparison of fuels (m³ ↔ m³)
Check how much of one gas replaces another at the same energy — e.g. how many m³ of LPG replace m³ of natural gas.
Source fuel
Target fuel
Volume [m³]
LPG / gas: mass ↔ gas volume
Enter mass in kilograms or gas volume — the other value, energy (kWh and MJ) and liquid volume are computed automatically.
Fuel
Mass [kg]
Gas volume [m³]
LPG to m³ and kg converter, plus comparison with natural gas
Liquefied petroleum gas (LPG) is sold in kilograms (cylinders, tanks), while heating appliances and natural gas are metered in cubic meters. This converter turns LPG mass into the volume of gas burned in the boiler and back.
It also compares fuels by calorific value: how many m³ of LPG replace 1 m³ of natural gas (and vice versa), and shows energy in kWh and liquid volume in liters.
How to use the converter
Set the reference conditions (15 °C standard or 0 °C normal).
Pick a fuel and enter mass in kg or gas volume — the fields convert each other.
Read the energy (kWh, MJ) and, for LPG, the liquid volume.
In the comparison section pair two fuels and check the m³ ↔ m³ equivalence.
What the converter computes
The converter combines four conversions in one tool:
- LPG mass ↔ gas volume (vapor phase, for combustion).
- Energy comparison m³ ↔ m³ between fuels (e.g. natural gas vs LPG).
- Fuel energy in kWh and MJ.
- LPG liquid volume in liters (cylinder, autogas).
Fields and settings
Reference conditions
Reference temperature for gas volume: 15 °C (standard) or 0 °C (normal, Nm³). The m³ ↔ m³ comparison is independent of this choice.
Fuel
Natural gas E and Lw, technical propane, propane-butane 60/40, butane and hydrogen.
Mass / gas volume
Enter kg or m³ of gas — the other field plus energy and liquid liters compute automatically.
Fuel comparison
Choose source and target fuel and a volume to get the energy equivalent.
Tips
Use energy (kWh) to size boiler power. Remember fuel data is typical — for settlements use the supplier's calorific value. Liquid liters apply to LPG only.
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