Cost to Run a 30-watt tablet charger for 10 hours in New York
Running a 30-watt tablet charger for 10 hours uses 0.3 kWh and costs $0.075 at $0.25/kWh in New York. Do that every day and it adds up to $2.25 a month.
Calculate your own cost
- Per hour
- $0.0080.03 kWh
- Per day
- $0.0750.3 kWh
- Per week
- $0.5252.1 kWh
- Per month (30 days)
- $2.259 kWh
- Per year
- $27.38110 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 30-watt tablet charger cost per hour?
At $0.25/kWh, it costs $0.008 per hour. The maths: 30 W ÷ 1,000 = 0.03 kWh per hour, × $0.25 = $0.008.
How much does it cost per month?
Used 10 hours a day for 30 days, it costs about $2.25 per month and uses 9 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
0.3 kWh per day, 9 kWh per month and 110 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?
Use the actual charging duration for a closer estimate. 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 $0.90 and at 30¢ it is $2.70. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in New York
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.03 kWh | $0.008 | $0.225 | $2.74 |
| 2 hours | 0.06 kWh | $0.015 | $0.45 | $5.48 |
| 3 hours | 0.09 kWh | $0.023 | $0.675 | $8.21 |
| 4 hours | 0.12 kWh | $0.03 | $0.90 | $10.95 |
| 5 hours | 0.15 kWh | $0.038 | $1.13 | $13.69 |
| 6 hours | 0.18 kWh | $0.045 | $1.35 | $16.43 |
| 7 hours | 0.21 kWh | $0.053 | $1.58 | $19.16 |
| 8 hours | 0.24 kWh | $0.06 | $1.80 | $21.90 |
| 9 hours | 0.27 kWh | $0.068 | $2.03 | $24.64 |
| 10 hours | 0.3 kWh | $0.075 | $2.25 | $27.38 |
| 11 hours | 0.33 kWh | $0.083 | $2.48 | $30.11 |
| 12 hours | 0.36 kWh | $0.09 | $2.70 | $32.85 |
| 13 hours | 0.39 kWh | $0.098 | $2.93 | $35.59 |
| 14 hours | 0.42 kWh | $0.105 | $3.15 | $38.33 |
| 15 hours | 0.45 kWh | $0.113 | $3.38 | $41.06 |
| 16 hours | 0.48 kWh | $0.12 | $3.60 | $43.80 |
| 17 hours | 0.51 kWh | $0.128 | $3.83 | $46.54 |
| 18 hours | 0.54 kWh | $0.135 | $4.05 | $49.28 |
| 19 hours | 0.57 kWh | $0.143 | $4.28 | $52.01 |
| 20 hours | 0.6 kWh | $0.15 | $4.50 | $54.75 |
| 21 hours | 0.63 kWh | $0.158 | $4.73 | $57.49 |
| 22 hours | 0.66 kWh | $0.165 | $4.95 | $60.23 |
| 23 hours | 0.69 kWh | $0.173 | $5.18 | $62.96 |
| 24 hours | 0.72 kWh | $0.18 | $5.40 | $65.70 |
How we worked it out
- Energy per hour: 30 W ÷ 1,000 = 0.03 kWh
- Cost per hour: 0.03 kWh × $0.25 = $0.008
- Cost per day: × 10 hours = $0.075
- Month and year: × 30 days = $2.25, × 365 days = $27.38
New York electricity prices
New York pays about $0.25 per kWh, which is 43% higher than the US average of $0.175. The same tablet charger would cost $1.58 a month at the national average.
What it costs in different places
Same 30-watt tablet charger, 10 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $1.58 |
| California | $0.32 | $2.88 |
| Texas | $0.155 | $1.40 |
| New York | $0.25 | $2.25 |
| Florida | $0.155 | $1.40 |
| Illinois | $0.17 | $1.53 |
| Pennsylvania | $0.18 | $1.62 |
| Ohio | $0.17 | $1.53 |
| Washington | $0.115 | $1.04 |
About tablet charger running costs
Tablet charging power changes as the battery fills and depends on the adapter and device. The maximum charger rating is not the average.
Typical sizes: 10 W, 20 W, 30 W, 45 W.
How to spend less: Use the actual charging duration for a closer estimate.
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 New York. 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.