Watt-hours to Kilowatt-hours Conversion Chart
Quick-reference chart converting watt-hours (Wh) to kilowatt-hours (kWh). Covers 1–100,000 Wh — for battery sizing, energy storage, EV range, and home appliance usage.
For a custom value not in this chart, use the Energy converter.
| Watt-hour (Wh) | Kilowatt-hour (kWh) |
|---|---|
| 1 Wh | 0.001 kWh |
| 5 Wh | 0.005 kWh |
| 10 Wh | 0.01 kWh |
| 25 Wh | 0.025 kWh |
| 50 Wh | 0.05 kWh |
| 100 Wh | 0.1 kWh |
| 200 Wh | 0.2 kWh |
| 500 Wh | 0.5 kWh |
| 1000 Wh | 1 kWh |
| 1500 Wh | 1.5 kWh |
| 2000 Wh | 2 kWh |
| 5000 Wh | 5 kWh |
| 7500 Wh | 7.5 kWh |
| 10000 Wh | 10 kWh |
| 15000 Wh | 15 kWh |
| 20000 Wh | 20 kWh |
| 30000 Wh | 30 kWh |
| 40000 Wh | 40 kWh |
| 50000 Wh | 50 kWh |
| 75000 Wh | 75 kWh |
| 100000 Wh | 100 kWh |
Conversion Formula
kWh = Wh ÷ 1,000 Wh = kWh × 1,000 1 kWh = 1,000 Wh (exact, by definition) Battery reference (Wh → kWh): 2,000 Wh = 2 kWh (small home battery) 5,000 Wh = 5 kWh (one Powerwall module) 13,500 Wh = 13.5 kWh (Tesla Powerwall 2) 40,000 Wh = 40 kWh (EV: Nissan Leaf base) 75,000 Wh = 75 kWh (EV: Tesla Model 3 Long Range) 100,000 Wh = 100 kWh (EV: Tesla Model S) Appliance daily energy use: 100 Wh/day = 0.1 kWh/day (LED lights ~8 hrs) 500 Wh/day = 0.5 kWh/day (laptop all day) 1,000 Wh/day = 1 kWh/day (refrigerator)
Frequently Asked Questions
How many kWh is 1,000 Wh?
1,000 Wh ÷ 1,000 = 1 kWh exactly. Wh and kWh differ only by a factor of 1,000. Electricity meters measure in kWh; small battery packs and portable chargers are often rated in Wh.
How many kWh does a Tesla EV battery hold?
Tesla models range from 54 kWh (Model 3 Standard Range, = 54,000 Wh) to 100 kWh (Model S Plaid, = 100,000 Wh). Electric car range per kWh depends on efficiency — roughly 4–5 miles per kWh for most EVs, so a 75 kWh battery provides approximately 300–375 miles of range.
What does 1 kWh look like as household energy?
1 kWh (1,000 Wh) powers a 60-watt bulb for ~16.7 hours, an average laptop (~45 W) for ~22 hours, or a microwave (1,000 W) for exactly 1 hour. An average US home uses about 30 kWh per day = 900 kWh per month.
How do I convert a battery's mAh to Wh or kWh?
Wh = mAh × Voltage ÷ 1,000. Example: a 10,000 mAh power bank at 3.7V = 10,000 × 3.7 ÷ 1,000 = 37 Wh = 0.037 kWh. A phone battery (~3,500 mAh at 3.85V) = 3,500 × 3.85 ÷ 1,000 = 13.5 Wh.
Why do solar panels and home batteries use kWh?
Solar panels are rated in watts (peak power), but their useful output is measured in kWh over time. A 5 kW solar system producing 5 peak sun hours generates 25 kWh/day. Home batteries store 5–27 kWh. kWh matches the billing unit on electricity statements, making comparison straightforward.
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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.