Kilowatt-hours to Watt-hours Conversion Chart
Quick-reference chart converting kilowatt-hours (kWh) to watt-hours (Wh). Covers 0.001–1,000 kWh — for electricity bills, solar systems, EVs, and portable battery sizing.
For a custom value not in this chart, use the Energy converter.
| Kilowatt-hour (kWh) | Watt-hour (Wh) |
|---|---|
| 0.001 kWh | 1 Wh |
| 0.005 kWh | 5 Wh |
| 0.01 kWh | 10 Wh |
| 0.05 kWh | 50 Wh |
| 0.1 kWh | 100 Wh |
| ¼ kWh | 250 Wh |
| ½ kWh | 500 Wh |
| 1 kWh | 1000 Wh |
| 2 kWh | 2000 Wh |
| 5 kWh | 5000 Wh |
| 10 kWh | 10000 Wh |
| 13.5 kWh | 13500 Wh |
| 20 kWh | 20000 Wh |
| 25 kWh | 25000 Wh |
| 40 kWh | 40000 Wh |
| 50 kWh | 50000 Wh |
| 75 kWh | 75000 Wh |
| 100 kWh | 100000 Wh |
| 200 kWh | 200000 Wh |
| 500 kWh | 500000 Wh |
| 1000 kWh | 1000000 Wh |
Conversion Formula
Wh = kWh × 1,000 kWh = Wh ÷ 1,000 1 kWh = 1,000 Wh (exact) 1 kWh = 3,600,000 J = 3,412 BTU Electricity bill reference: 0.001 kWh = 1 Wh (LED bulb in 1 min) 0.1 kWh = 100 Wh (small appliance 1 hr) 1 kWh = 1,000 Wh (standard billing unit) 10 kWh = 10,000 Wh (1/3 of avg US daily use) 30 kWh = 30,000 Wh (avg US household daily use) 900 kWh = 900,000 Wh (avg US household monthly use) EV charging reference: 13.5 kWh = 13,500 Wh (1 Tesla Powerwall module) 75 kWh = 75,000 Wh (typical EV battery) 7 kWh = 7,000 Wh (Level 2 charger output per hr)
Frequently Asked Questions
How many Wh is 1 kWh?
1 kWh = 1,000 Wh exactly. One kilowatt-hour is the energy used by a 1,000-watt (1 kW) appliance running for exactly one hour, or a 100-watt appliance running for 10 hours.
How many Wh is my electricity bill's monthly usage?
The average US household uses 900 kWh/month = 900,000 Wh/month = 30 kWh/day = 30,000 Wh/day. At $0.13 per kWh, the monthly bill is approximately $117. High-use homes in extreme climates may exceed 1,500 kWh/month (1,500,000 Wh).
How many Wh does a laptop use per day?
A typical laptop draws 30–60 watts. At 45 W average, running 8 hours = 45 × 8 = 360 Wh = 0.36 kWh per day. Over a month, a laptop uses approximately 10.8 kWh (10,800 Wh). This helps quantify the impact on your electricity bill.
What Wh capacity do I need in a portable power station?
A 500 Wh (0.5 kWh) portable power station can run a 50 W lamp for 10 hours, charge a phone 30+ times, or run a CPAP machine for one night. A 1,000 Wh unit can power a mini-fridge for 24+ hours. Match the Wh to your longest expected outage multiplied by appliance wattage.
How many kWh does air conditioning use per month?
A central AC running 8 hours/day at 3 kW (10,238 BTU/hr) uses 3 × 8 = 24 kWh/day = 720 kWh/month. Window AC units (1,200–2,000 W, 4,000–7,000 BTU/hr) use 9.6–16 kWh/day. AC typically accounts for 15–40% of a US home's summer electricity use.
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Use the interactive converter →All conversion values are calculated using internationally recognized conversion factors. Results are provided for general informational purposes — verify critical values independently. Read our full disclaimer.