Cost to Run a 300-watt refrigerator for 10 hours in Washington
Running a 300-watt refrigerator for 10 hours uses 3 kWh and costs $0.345 at $0.115/kWh in Washington. Do that every day and it adds up to $10.35 a month.
Calculate your own cost
- Per hour
- $0.0350.3 kWh
- Per day
- $0.3453 kWh
- Per week
- $2.4221 kWh
- Per month (30 days)
- $10.3590 kWh
- Per year
- $125.931,095 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 300-watt refrigerator cost per hour?
At $0.115/kWh, it costs $0.035 per hour. The maths: 300 W ÷ 1,000 = 0.3 kWh per hour, × $0.115 = $0.035.
How much does it cost per month?
Used 10 hours a day for 30 days, it costs about $10.35 per month and uses 90 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
3 kWh per day, 90 kWh per month and 1,095 kWh per year at 10 hours a day. A kWh is one kilowatt (1,000 W) used for one hour. It is the unit on your electricity bill.
How can I lower the cost?
Keep it away from the oven, keep the door seals clean and set it to 37°F (3°C). Check your bill for the exact rate and enter it above.
Does my electricity rate change the answer?
Yes, a lot. At 10¢ per kWh the monthly cost is $9.00 and at 30¢ it is $27.00. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in Washington
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.3 kWh | $0.035 | $1.04 | $12.59 |
| 2 hours | 0.6 kWh | $0.069 | $2.07 | $25.19 |
| 3 hours | 0.9 kWh | $0.104 | $3.11 | $37.78 |
| 4 hours | 1.2 kWh | $0.138 | $4.14 | $50.37 |
| 5 hours | 1.5 kWh | $0.173 | $5.18 | $62.96 |
| 6 hours | 1.8 kWh | $0.207 | $6.21 | $75.56 |
| 7 hours | 2.1 kWh | $0.242 | $7.25 | $88.15 |
| 8 hours | 2.4 kWh | $0.276 | $8.28 | $100.74 |
| 9 hours | 2.7 kWh | $0.311 | $9.32 | $113.33 |
| 10 hours | 3 kWh | $0.345 | $10.35 | $125.93 |
| 11 hours | 3.3 kWh | $0.38 | $11.39 | $138.52 |
| 12 hours | 3.6 kWh | $0.414 | $12.42 | $151.11 |
| 13 hours | 3.9 kWh | $0.449 | $13.46 | $163.70 |
| 14 hours | 4.2 kWh | $0.483 | $14.49 | $176.30 |
| 15 hours | 4.5 kWh | $0.518 | $15.53 | $188.89 |
| 16 hours | 4.8 kWh | $0.552 | $16.56 | $201.48 |
| 17 hours | 5.1 kWh | $0.587 | $17.60 | $214.07 |
| 18 hours | 5.4 kWh | $0.621 | $18.63 | $226.67 |
| 19 hours | 5.7 kWh | $0.656 | $19.67 | $239.26 |
| 20 hours | 6 kWh | $0.69 | $20.70 | $251.85 |
| 21 hours | 6.3 kWh | $0.725 | $21.74 | $264.44 |
| 22 hours | 6.6 kWh | $0.759 | $22.77 | $277.04 |
| 23 hours | 6.9 kWh | $0.794 | $23.81 | $289.63 |
| 24 hours | 7.2 kWh | $0.828 | $24.84 | $302.22 |
How we worked it out
- Energy per hour: 300 W ÷ 1,000 = 0.3 kWh
- Cost per hour: 0.3 kWh × $0.115 = $0.035
- Cost per day: × 10 hours = $0.345
- Month and year: × 30 days = $10.35, × 365 days = $125.93
Washington electricity prices
Washington pays about $0.115 per kWh, which is 34% lower than the US average of $0.175. The same refrigerator would cost $15.75 a month at the national average.
What it costs in different places
Same 300-watt refrigerator, 10 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $15.75 |
| California | $0.32 | $28.80 |
| Texas | $0.155 | $13.95 |
| New York | $0.25 | $22.50 |
| Florida | $0.155 | $13.95 |
| Illinois | $0.17 | $15.30 |
| Pennsylvania | $0.18 | $16.20 |
| Ohio | $0.17 | $15.30 |
| Washington | $0.115 | $10.35 |
About refrigerator running costs
A refrigerator is rated at its compressor power, but the compressor only runs about a third of the day. Annual kWh on the energy label is the best guide.
Typical sizes: 100 W, 150 W, 200 W, 300 W.
How to spend less: Keep it away from the oven, keep the door seals clean and set it to 37°F (3°C).
What this estimate assumes
- The appliance draws its full stated wattage the whole time it is on. Real units with a thermostat cycle off and cost less.
- Wattage is the typical label value, not a measured value. Check the label on your own appliance.
- The rate is an approximate residential average in Washington. Your bill may include fixed fees, tiers or time-of-use pricing. Edit the rate above.
- A month is 30 days and a year is 365 days.