LPG Consumption Calculator

Sizing LPG Cylinder or Tank Draw Rate

LPG (a propane/butane mix) is typically metered by weight rather than volume, since it's stored as a pressurized liquid. This calculator converts heat input directly into a kilogram-per-hour LPG draw rate.

The Formula

LPG Consumption = (Heat Input(kW) × 3.6) / Heating Value(MJ/kg)

LPG has a heating value around 46 MJ/kg; this calculator defaults to 46.1 if not specified.

Worked Example

A 30 kW LPG heater:

Consumption = (30 × 3.6) / 46.1 = 2.34 kg/hr

How to Use This Calculator

Enter the appliance's Heat Input in kW.
Optionally enter the LPG Heating Value (defaults to 46.1 MJ/kg).
Select Calculate to get LPG consumption in kg/hr.

Related Calculations

Working with pure propane instead? See the Propane Consumption Calculator, or check natural gas usage in the Natural Gas Consumption Calculator.