Propane vs. kerosene cost depends on local fuel prices, heater efficiency, and how much heat a home needs. Propane commonly costs less per useful unit of heat when purchased in bulk, while kerosene can be competitive when its per-gallon price is low and the appliance is efficient.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Propane | $2.00/gal | $3.00/gal | $4.00/gal | Bulk delivery may cost less than cylinder exchange or small-container fills. |
| Kerosene | $4.00/gal | $5.00/gal | $6.50/gal | Retail pump and delivered prices vary by region and season. |
| Propane heat | $22/MMBtu | $30/MMBtu | $44/MMBtu | Assumes roughly 90% appliance efficiency. |
| Kerosene heat | $30/MMBtu | $41/MMBtu | $53/MMBtu | Assumes roughly 90% appliance efficiency. |
Typical propane and kerosene heating prices per gallon
Propane is often about $2-$4 per gallon for residential bulk delivery, with a typical price near $3. Kerosene commonly runs $4-$6.50 per gallon, averaging around $5. The comparison changes by location: small propane cylinders can have a much higher effective price than a tank refill, and kerosene sold in containers may cost more than pump fuel.
For many households, propane offers the lower cost per unit of delivered heat, even though a gallon contains less energy. One gallon of propane holds about 91,500 BTU; a gallon of kerosene holds about 135,000 BTU. At $3 propane and $5 kerosene, each provides about 27,000-28,000 BTU per dollar before appliance losses. Actual fuel bills depend on the unit price and how efficiently equipment converts fuel into room heat.
Assumptions: U.S. residential fuel prices, ordinary access, and no taxes or tank rental added.
What tank delivery and heater labor add to the quote
Fuel is only part of the expense when installing or changing a heating setup. A permanently installed propane system may need a tank, regulator, gas line, and permitted connections. A portable kerosene heater typically has a lower setup cost, but ongoing fuel purchases and safe storage still matter.
| Cost component | Propane range | Kerosene range | Typical scope |
|---|---|---|---|
| Fuel | $2-$4/gal | $4-$6.50/gal | Bulk, pump, or container price |
| Equipment | $500-$2,500 | $100-$500 | Portable heater or basic heating unit |
| Installation labor | $300-$1,500 | $0-$300 | Propane line and connection; simple portable setup costs less |
| Tank, delivery, or setup | $100-$800 | $20-$150 | Tank rental or placement, fuel delivery, and initial setup |
Installed propane furnace or space-heater projects can exceed these equipment ranges when venting, electrical work, or a new tank is needed. Portable kerosene appliances avoid much installation labor, though they require appropriate ventilation and must be used according to manufacturer instructions.
How BTU capacity and appliance efficiency change the bill
Fuel price per gallon alone can mislead. Compare cost per useful million BTU (MMBtu), using the fuel’s energy content multiplied by appliance efficiency. A 90% efficient propane unit delivers about 82,000 BTU per gallon; a 90% efficient kerosene heater delivers about 122,000 BTU per gallon.
At the example prices above, that works out to roughly $37 per useful MMBtu for propane and $41 for kerosene. Actual results vary: a 75%-efficient appliance can use about 20% more fuel for the same heat than a 90%-efficient model. Kerosene heaters rated below 10,000 BTU per hour may suit a small room, while units around 20,000-23,000 BTU per hour serve larger spaces but consume fuel faster.
Use the appliance’s input BTU rating and efficiency—not just its fuel type—to estimate operating expense. A simple estimate is useful heat needed ÷ (BTU per gallon × efficiency) × price per gallon.
Which fuel is cheaper for a 500-square-foot room?
For an illustration, assume the room needs an average of 5,000 BTU per hour for 8 hours daily over 30 days, or 1.2 million BTU of useful heat. At 90% efficiency, that requires about 14.6 gallons of propane or 9.9 gallons of kerosene. At $3 and $5 per gallon respectively, fuel costs are about $44 for propane and $50 for kerosene.
That difference is modest and can reverse with local pricing. If propane costs $4 per gallon, the same month is about $58; if kerosene costs $4 per gallon, it is about $40. The room’s insulation, outdoor temperature, thermostat setting, and actual run time can change the estimate substantially.
For a reliable budget, multiply expected monthly fuel use by a recent local quote rather than relying on a national average.
Why bulk propane and kerosene pump prices differ by region
Rural customers may pay more for delivery when a supplier has a long route or imposes a minimum fill. Urban and suburban customers may have more suppliers, but limited tank access or delivery scheduling can add expense. Kerosene prices also differ between pump sales and small containers, while propane cylinder exchange often carries a convenience premium.
As a planning allowance, delivered prices can run 5%-15% above a local bulk or pump benchmark in areas with added transport or limited competition. Winter demand and cold-weather delivery constraints can raise quotes by another 5%-20% in some markets. These are possible local premiums, not guaranteed seasonal increases; confirm fees, minimum gallons, and delivery charges before comparing offers.
When portable heaters beat a new propane installation
A kerosene heater can cost less upfront for occasional supplemental heat because many portable models cost $100-$500 and need no fuel line. Propane portable heaters often cost $100-$400, while a fixed propane heater with professional connection can push the initial project beyond $1,000. For frequent whole-home heating, however, a properly sized central propane system may be more practical than relying on portable units.
Neither purchase price alone nor a short fuel-price comparison captures total ownership cost. Include equipment replacement, venting, maintenance, tank rental, and the number of heating hours expected. A low-cost portable unit used daily may consume enough fuel to erase its initial savings.
How to cut heating fuel costs without changing systems
Reduce the heated area first: close doors, seal drafts, and lower the thermostat where safe. A 1°F thermostat reduction can trim heating use by about 1% over time, although savings vary with weather and home conditions. Avoid heating unused rooms or choosing a larger-capacity appliance than the space needs.
Compare quotes on the same basis: delivered fuel price, tank or cylinder fees, minimum purchase, and any recurring rental charge. Ask suppliers for the price at the expected fill quantity, since a small delivery and a full tank may have different per-gallon rates. For equipment, compare installed quotes that specify capacity, venting, labor, and warranty.
Keeping the system appropriately sized and comparing total delivered cost are usually more useful than chasing the lowest advertised gallon price. Follow appliance ventilation and storage requirements, and do not use an indoor heater in a way its manufacturer prohibits.