Refrigerator vs Mini Fridge: Which Costs Less to Run?
Surely the little fridge costs less than the big one? Per cubic foot, the answer flips.
Refrigerator · per month
$20.03
24 hours/day (always on) · 100–250 W
Mini Fridge · per month
$8.01
24 hours/day (always on) · 40–100 W
Verdict
The full-size refrigerator is far more efficient per unit of storage — a modern 20 cu ft unit often uses only 1.5–2× the energy of a 3 cu ft mini. As a second fridge for a few drinks, the mini wins on absolute draw; but consolidating everything into one efficient full-size unit and unplugging the mini is the cheapest configuration of all.
Side by side
| Refrigerator | Mini Fridge | |
|---|---|---|
| Typical power | 100–250 W | 40–100 W |
| Typical usage | 24 hours/day (always on) | 24 hours/day (always on) |
| Energy per month | 109 kWh | 44 kWh |
| Cost per month (US avg) | $20.03 | $8.01 |
| Cost per year (US avg) | $240 | $96.18 |
| Cost per month in Hawaii | $52.53 | $21.01 |
Rates as of July 2026. Adjust the assumptions on each appliance's page: Refrigerator · Mini Fridge.
Frequently asked questions
Which is cheaper to run: a refrigerator or a mini fridge?
At typical usage and the current U.S. average rate (18.3¢/kWh), the mini fridge is cheaper: about $8.01/month versus $20.03/month for the refrigerator — a difference of $12.02 per month.
How much could I save per year by choosing the mini fridge?
About $144 per year at typical usage and average rates. In Hawaii (48¢/kWh) the annual gap grows to roughly $378.
Do these numbers apply to my state?
The ratio between the two stays the same everywhere, but the dollar gap scales with your rate — from Louisiana at 12.7¢/kWh to Hawaii at 48¢/kWh. Open each appliance's page for the exact cost in your state.