Outdoor Refrigerator BTU Calculator

What BTU rating for your outdoor refrigerator?

Spec the cooling capacity an outdoor refrigerator needs based on volume, climate, sun exposure, and cabinet insulation. Built on ASHRAE heat-load principles and outdoor-rated refrigerator manufacturer specifications.

⏱ ~25 sec•ASHRAE heat-load + outdoor specs•Calculator

100

BTU per cu ft

Indoor base

+50%

Full sun load

vs shaded

+80%

Hot ambient

90–110°F

20%

Safety margin

Recommended

STEP 01

Volume.
Climate. Sun.

Outdoor fridges fight 40–120% more heat load than indoor units. We size with a 20% safety margin.

Refrigerator size

cu ft

Climate (peak summer)

Sun exposure

Installed in insulated outdoor cabinet (-15%)

Insulated cabinets cut load and protect the unit from weather.

Updates live as you type

Recommended cooling capacity

1050BTU/hr

1/5 HP compressor. Includes 20% safety margin over baseline 875 BTU.

Indoor baseline

500 BTU

Compressor size

1/5 HP compressor

Under the hood

Heat load math, outdoor.

Built on ASHRAE refrigeration heat-load principles. Outdoor multipliers reflect manufacturer-published ambient and solar-gain adjustments for outdoor-rated refrigerators.

01
Volume baseline
Indoor baseline is 100 BTU/hr per cu ft of refrigerated volume — the starting point for any heat-load estimate.
02
Climate multiplier
Mild ×1.2, moderate ×1.4, hot ×1.8, very hot ×2.2. Reflects the work the compressor does against ambient temperature.
03
Sun multiplier
Shaded ×1.1, partial ×1.25, full sun ×1.5. Solar gain on the cabinet adds heat that has to be pumped back out.
04
Insulation + safety margin
Insulated cabinet ×0.85 (saves 15%). We add a final 20% safety margin so the compressor isn't running flat out at peak load.

Questions

Frequently asked

Outdoor units fight ambient heat that indoor fridges never see — direct sun adds 25–50% to the heat load, and 90°F+ ambient adds another 40–80%. The compressor has to work harder against those loads.