Gas Pipe Sizing Calculator

Quickly Calculate the Correct Pipe Size for Any Residential or Commercial Gas System

How to Use the Calculator

  1. Select the Type of Gas Being Used: Start by choosing the type of gas you’re using (e.g., Natural Gas or Propane) from the drop-down menu.
  2. Enter Appliance Details: Input the name of your first appliance, the type of gas it uses, the pipe length from the main gas supply (distance from the natural gas meter or propane regulator), and its BTU rating (INPUT Btu/h). Choose the gas pressure and the type of pipe material being used.
  3. Add the Appliance: Once your appliance details are filled in, click “Add Appliance” to save it to the list. If you want to add more appliances, repeat the process by replacing the information in the form and adding them one by one.
  4. Submit for Calculation: Once all your appliances are listed, click “Calculate Pipe Size.” You’ll get a detailed breakdown of the pipe sizes needed for each section, plus a diagram you can save or print.

*Note – The calculator won’t work until you have added at least one appliance.

Propane and Natural Gas Pipe Sizing Calculator

For best drawing results on mobile, turn your phone horizontally before calculating your pipe size.

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Pipe Sizing Made Easy

Advantages of Our Gas Pipe Sizing Calculator

This gas pipe sizing calculator is designed to help homeowners and contractors determine the best pipe size for their gas installations using propane or natural gas.

Using the longest-run method, this tool simplifies pipe sizing by calculating the required diameter for each segment of pipe in a gas system.

It takes the distance from the meter or propane regulator to the furthest outlet and compensates for any pressure loss due to bends or fittings that would add to the overall pipe length so the gas system operates efficiently and safely under maximum load.

User-Friendly

Our calculator was created to make the process of calculating pipe size accessible for everyone, regardless of your technical background.

Accurate and Reliable

Calculations are based on up-to-date industry standards and precise pipe sizing data to guarantee safety and reliability.

Completely Free

Access our calculator online at no cost and start planning your gas system installation with confidence.

Gas pipe sizing calculator

When to Use Our Gas Pipe Sizing Calculator

Installing New Gas Appliances

Anytime you add a gas appliance to your home, you need to make sure your existing pipe can handle the additional load.

Whether you’re adding a gas range for precise cooking, installing a more efficient heating system, or upgrading to a tankless water heater for its endless supply of hot water, it’s important to determine the diameter of pipe needed for the installation.

You’ll also need to consider the size of any existing pipes you might have to connect into. Installing a gas line that’s too small can result in a bottleneck in the gas pressure, which will affect the overall performance of your new gas appliance.

Converting Appliances from One Fuel Type to Another

Our calculator can also be helpful if you want to convert appliances from one type of gas to another. For example, converting a gas grill from propane to natural gas or switching a furnace to operate on natural gas instead of propane might require a larger gas line. This is because propane operates at a higher pressure than natural gas, so it can provide more BTUs through a smaller diameter pipe.

If Appliances Aren't Working Properly

Do you feel like your appliances aren’t performing as they should? If you see an uneven flame on your stovetop or your heating system can’t keep your space warm, it might be because your gas lines weren’t sized correctly to begin with. 

Our calculator can help you figure out if it’s an appliance problem or if you need to upgrade your pipe size so they get the right amount of gas.

Upgrading To A Higher Supply Pressure

If you’re thinking about adding larger appliances to your home, like a gas generator or pool heater, you’ll more than likely have to upgrade your supply pressure to 2 PSI. 

With this increase in pressure, you’ll also need to add gas regulators before each appliance. These regulators will reduce the 2 PSI pressure to 7 to 10 in. w.c. (water column), which is the standard inlet pressure for most gas appliances. 

While gas regulators can be adjusted to a certain extent, you need to make sure the gas line after the regulator is large enough to supply the appliance with enough pressure. Our pipe sizing calculator can tell you exactly how far away you can place your regulators and help you determine if one regulator can handle multiple appliances. 

Frequently Asked Questions

Q: Can I use this calculator for both residential and commercial projects?

A: Yes, our Gas Pipe Sizing Calculator is versatile enough to handle both residential and commercial project calculations for gas piping sized up to 2 inches in diameter.

Q: How often are the calculation standards updated?

A: We regularly update our database and calculation algorithms to reflect the latest standards and research in gas system safety and efficiency.

Q: What types of gases can I calculate sizes for using this calculator?

A: Our calculator is designed to work with natural gas and propane at 2.0 PSI (1.0 PSI pressure drop) or less than 2.0 PSI (0.5 in. w.c. pressure drop) pressure. Select the correct gas type and gas pressure you’re using from the options to receive accurate sizing information.

Q: Can this tool be used for sizing pipes for other fluids or gases not typically used for heating? 

A: This pipe sizing calculator is specifically calibrated for natural gas and propane. Using it for other gases or liquids will not provide accurate results and isn’t recommended.

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