Consumers often compare the cost of LP gas and natural gas for heating, cooking, and hot water. This article presents practical price ranges in USD, explains major cost drivers, and shows how regional rates, efficiency, and usage patterns affect total spend on either fuel.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| LP price per gallon | $2.20 | $2.90 | $3.60 | Includes delivery, variable market pricing |
| Natural gas price per therm | $0.60 | $1.00 | $1.40 | Includes delivery charges in many regions |
| Annual heating bill (house, 1,800 sq ft) | $1,000 | $2,000 | $3,200 | Based on typical efficiency and climate |
| Storage or line costs (monthly) | $0 | $10 | $40 | LP storage tanks, gas line service, meters |
Typical Heating Cost for LP Gas versus Natural Gas
Homeowners commonly see LP costs higher on a per-BTU basis than natural gas in many markets. LP is sold by gallon, while natural gas is priced per therm or per million BTU, so total spend depends on efficiency, system size, and usage. Assumptions: standard 90% AFUE furnace, moderate winter severity, Midwest-to-South region mix.
Major Cost Components for Fueling with LP and Natural Gas
Fuel price per unit, delivery or meter charges, and appliance efficiency drive most of the bill. The following table breaks down typical components you’ll see on a quote or bill.
| Component | LP (per gallon) | Natural Gas (per therm) | Notes |
|---|---|---|---|
| Fuel price | $2.20–$3.60 | $0.60–$1.40 | Market-driven; reflects regional supply |
| Delivery/line charges | $0–$8 per gallon equivalent | $0–$2 per therm | Tank or meter access, fixed monthly fees |
| Storage or infrastructure | Tank rental or refill logistics | Gas line maintenance, meter reads | Annual or seasonal costs |
| Equipment efficiency impact | Higher BTU content can lower gallons used | Seasonal efficiency varies by furnace/boiler | AFUE or annual fuel utilization efficiency |
Key Variables That Change Fuel Cost Quotes
Efficiency, climate, and home size dominate quotes for LP and natural gas. Notable drivers include heating load (BTU), system efficiency (AFUE or HSPF), and regional price volatility. Assumptions: single-family home, standard insulation, traditional 2- or 3-ton system.
How System Type and Efficiency Move the Bottom Line
High-efficiency furnaces and condensing boilers reduce fuel consumption enough to offset higher upfront equipment costs. The price impact depends on fuel type and expected lifetime. Assumptions: 1,800–2,200 sq ft home, typical ductwork, standard weather.
Regional Variations That Actually Shift Your Budget
Gas prices and delivery fees differ widely by region, affecting annual fuel spend. Regions with abundant natural gas tend to have lower per-therm costs, while rural LP access can raise per-gallon prices. Assumptions: moderate winter and average heating load.
Per-Unit Pricing: Gallons Versus Therms and How to Compare
Convert LP gallons to BTUs to compare apples to apples with natural gas. One gallon of LP equals about 91,500 BTU; one therm equals 100,000 BTU. This makes rough LP-to-natural-gas comparisons possible in cost terms. Assumptions: 80–95% efficiency for typical equipment.
Example conversion: if LP is $2.80 per gallon and natural gas is $1.10 per therm, a 50,000 BTU load would cost about $1.35 with LP (50,000/91,500 × 2.80) versus $0.55 with natural gas (50,000/100,000 × 1.10) before efficiency adjustments.
Delivery, Metering, and Service Fees That Shape the Bill
Monthly charges can alter year-to-year costs even if fuel prices stay flat. LP deliveries may require scheduling windows and minimum-fill fees, while natural gas customers often face fixed monthly charges and sometimes reset fees. Assumptions: average suburb with standard service agreements.
Options to Lower Furnace Fuel Expenses Without Sacrificing Comfort
Targeted efficiency upgrades and prudent usage can cut bills in both fuels. Consider programmable thermostats, improving insulation, sealing ducts, or selecting a mid-range AFUE machine. Assumptions: four-season climate, existing ducts in fair condition.
Regional Quotes and Real-World Scenarios You Can Model
Comparing three real-world quotes helps anchor expectations for LP and natural gas costs. The scenarios below use common home sizes and equipment types to illustrate price ranges. Assumptions: standard residential furnace or boiler, Midwest/Northeast climate mix.
Scenario: Switching from LP to Natural Gas in a Typical Home
Switching fuels can impact total cost over a heating season depending on regional prices and unit efficiency. A cautious estimate compares annual energy use after conversion, including any manual costs for piping, meters, and permits. Assumptions: existing home footprint, 1,800–2,100 sq ft, mid-efficiency unit.
