Kilowatt-Hours (kWh) to Watt-Hours (Wh) Converter
Enter a value to instantly convert between energy units.
1 Kilowatt-Hour = 1000 Watt-Hour
Key Formulas
Kilocalorie → Kilojoule
kJ = kcal × 4.184Kilojoule → Kilocalorie
kcal = kJ × 0.239006Kilowatt-Hour → Joule
J = kWh × 3600000Joule → Kilowatt-Hour
kWh = J × 2.77778e-7Formula
Wh = kWh × 1000Both are electrical energy units differing only in scale. Watt-hours measure small, portable energy (batteries, power banks); kilowatt-hours measure household or utility-scale energy (your electricity bill). You convert from kWh to Wh when breaking down large energy amounts into device-level terms — a home's 30 kWh daily consumption becomes 30,000 Wh, helping you understand how many typical phone charges or device runtimes that represents.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
An energy auditor converting household units. 1 kWh from your electricity bill = 1,000 Wh. A smartphone battery (15 Wh) could charge about 66 times with that energy.
1 kWh = 1000 Wh
A solar system owner checking daily production. 30 kWh daily output (30,000 Wh) could charge 2,000 smartphone batteries or run a 3 kW air conditioner for 10 hours.
30 kWh = 30000 Wh
A building manager analyzing LED lighting. Swapping 10 LED bulbs saves 0.05 kWh/day (50 Wh/day) — about 18 kWh/year, or $2.70 annually at $0.15/kWh.
0.05 kWh = 50 Wh
A power bank manufacturer comparing specs. Their backup battery is rated 10 kWh (10,000 Wh), equivalent to charging 650 standard phones, marketed as an emergency UPS for small offices.
10 kWh = 10000 Wh