Reefer Fuel Cost Calculator
Calculate the fuel cost of running a refrigerated trailer (reefer) unit based on hourly consumption and operating time.
Results
Visualization
How It Works
Reefer (refrigerated trailer) units burn diesel independently of the truck engine, adding significant fuel cost to cold chain operations. A typical reefer unit consumes 0.8-1.5 gallons per hour depending on temperature setting, ambient conditions, and unit age. This cost is separate from the truck's drive fuel and must be factored into load pricing for refrigerated freight.
The Formula
Variables
- Gallons Per Hour — Reefer unit fuel consumption rate (typically 0.8-1.5 gal/hr)
- Hours Per Day — Hours the reefer unit runs per day
- Days — Number of days the reefer is operating
- Fuel Price — Current diesel price per gallon
Worked Example
A reefer unit burning 1.2 gallons per hour, running 10 hours per day for a 5-day trip uses 60 gallons total. At $3.85/gallon, that costs $231.00 in reefer fuel alone — on top of the truck's drive fuel. Per hour, the reefer costs $4.62 to operate. Over a 22-day working month, reefer fuel alone costs $1,016.
Practical Tips
- Pre-cool the trailer at the shipper dock using shore power when available to reduce reefer fuel burn on the road.
- Maintain reefer unit door seals and insulation — air leaks force the unit to work harder and burn more fuel.
- Newer reefer units with multi-temperature zones consume more fuel — factor this into pricing for multi-stop temperature loads.
- Schedule reefer maintenance every 1,500 engine hours to maintain fuel efficiency and prevent breakdowns.
- Add reefer fuel cost as a separate line item when pricing loads — many carriers undercharge because they forget to include it.
Frequently Asked Questions
How much fuel does a reefer unit use per hour?
A standard reefer unit uses 0.8-1.5 gallons per hour depending on the temperature setpoint, ambient temperature, insulation condition, and unit age. Deep-frozen loads (below 0 degrees F) consume more fuel than standard refrigerated loads.
Does the reefer run on the same fuel tank as the truck?
No. Most reefer units have their own separate diesel fuel tank, typically 50-100 gallons. Some newer hybrid units can run on electric standby power at docks but switch to diesel on the road.
How often should I service the reefer unit?
Major reefer manufacturers recommend service every 1,500 engine hours or every 6 months, whichever comes first. Regular maintenance keeps fuel consumption low and prevents costly breakdowns that can spoil loads.
Should I charge extra for reefer loads?
Absolutely. Reefer fuel alone adds $0.05-$0.15 per mile in operating cost depending on run time. Plus reefer maintenance, higher insurance for cargo value, and temperature monitoring costs. Reefer rates should be $0.25-$0.75 per mile higher than dry van rates.
Can I run a reefer on electric power?
Yes, at dock facilities with shore power hookups. Electric standby saves diesel and reduces emissions during loading/unloading and overnight parking. Some new reefers also have battery-electric modes for short zero-emission operation.