Propane to Natural Gas Conversion Chart

Emily Jul 26, 2026

Considering a switch from propane to natural gas for your home or business? Understanding the conversion process involves grasping the differences between these two fuel types and how they're measured. This comprehensive guide will walk you through a propane to natural gas conversion chart, explaining the units of measure, typical conversion rates, and what you need to know to make an informed decision.

Can You Convert Any Propane Grill to Natural Gas? - Pioneer Smoke House
Can You Convert Any Propane Grill to Natural Gas? - Pioneer Smoke House

Before diving into the conversion specifics, let's clarify the two fuel sources. Propane is a liquefied petroleum gas (LPG) stored and transported as a liquid in pressurized cylinders. Natural gas, on the other hand, is a gaseous fossil fuel primarily composed of methane, delivered via underground pipelines. Both fuels are widely used for heating, cooking, and powering appliances, but they're measured differently, leading us to the need for a conversion chart.

A and C Propane Natural Gas Conversion Kits
A and C Propane Natural Gas Conversion Kits

Understanding Fuel Units: BTU, therms, and gallons

Propane is typically measured in gallons, while natural gas is usually billed in therms or cubic feet. To compare these two fuels, we need to understand their energy content and common unit conversions.

Differences Between Propane and Natural Gas
Differences Between Propane and Natural Gas

British Thermal Unit (BTU) is the standard unit of energy measurement in the United States. Here's a basic conversion chart to get you started:

Fuel Common Unit BTU Equivalent
Propane Gallon Approximately 91,500 BTU
Natural Gas Therm (100 cubic feet) Approximately 100,000 BTU
Difference Between Natural Gas and Propane
Difference Between Natural Gas and Propane

Converting Propane to Natural Gas

To switch from propane to natural gas, you'll need to know the energy output required by your appliances. First, calculate the total BTU input needed for all your propane-powered devices. Then, use that total to determine the natural gas requirement in therms:

Propane to Natural Gas Conversion: Total Propane BTU / 100,000 = Required Therms of Natural Gas

Generator Conversion Kits to Propane and Natural Gas.
Generator Conversion Kits to Propane and Natural Gas.

Converting Natural Gas to Propane

Alternatively, if you need to temporarily switch back to propane or size a new propane setup, you can follow these steps to convert natural gas to propane requirements:

Natural Gas to Propane Conversion: Total Natural Gas BTU / 91,500 = Required Gallons of Propane

General Talk Archives - Page 10 of 35 - PopUpBackpacker
General Talk Archives - Page 10 of 35 - PopUpBackpacker

Note that these conversions are approximate and can vary based on the specific energy content of your fuel sources. Always consult professional help for precise measurements and calculations.

Appliance Compatibility and Conversion Considerations

Different Types of Furnaces Explained: Gas, Electric, Oil, and Propane
Different Types of Furnaces Explained: Gas, Electric, Oil, and Propane
a diagram showing the different types of oil and gas in various stages of flow from one tank to another
a diagram showing the different types of oil and gas in various stages of flow from one tank to another
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3 Ways to Check How Much Propane Is Left in Your Tank
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How Many Gallons Are In A 40 lb Propane Tank? (40 lb To Gallons)
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How Long Will 500 Gallons Of Propane Last?
Easy Way to Check How Much Propane is Left for Your Gas Grill!
Easy Way to Check How Much Propane is Left for Your Gas Grill!
a person holding a wrench in front of an oven with the words natural gas to propane conversation
a person holding a wrench in front of an oven with the words natural gas to propane conversation
How To Convert A Natural Gas Stove To Propane In 6 Easy Steps?
How To Convert A Natural Gas Stove To Propane In 6 Easy Steps?
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How To Convert An Oil Furnace To Gas Or Propane—And Should You?
Portable Generator Conversion to Natural Gas & Propane
Portable Generator Conversion to Natural Gas & Propane

Before proceeding with the fuel switch, ensure your appliances are compatible with the new fuel type. Most modern appliances are dual-fuel compatible (propane or natural gas), but it's essential to check and potentially adapt or replace any incompatible units.

Converting the fuel source also involves adjusting your HVAC system, water heater, and other appliances to accommodate the new fuel. appliance-specific conversion guidelines might be required, so consult the manufacturer's instructions or a professional installer for detailed guidance.

Professional Installation and Support

While a DIY approach might be tempting, converting fuel sources is hazardous and should be left to licensed professionals. Reduction of propane to natural gas conversion risks and ensures a smooth transition:

  • Safety adherence: Licensed technicians follow established safety protocols during installation.
  • Expertise in conversions: Professionals possess the knowledge and tools to adapt your appliances and systems accurately.
  • Compliance with local regulations: A professional ensures your conversion meets local, state, and federal regulations and building codes.

Get multiple quotes, and don't hesitate to ask for references and certifications before hiring a contractor. This ensures you choose the best service provider for your fuel conversion needs.

Considering a propane to natural gas conversion? Understanding the process, units of measure, and essential conversions is the first step. By consulting the conversion chart and adhering to safety protocols, you can successfully switch fuels and enjoy the benefits of natural gas.