How Many Watts Does a Electric Blanket Use?
Electric blankets are an energy-efficient way to stay warm because they heat you directly rather than heating an entire room. They are practical for off-grid and emergency heating.
Typical Power
75W
Power Range
40-200W
Daily Usage
600Wh
(8 hrs/day typical)
Electric Blanket Runtime Calculator
Range: 40-200W
Continuous Runtime
10.9 hours
Days at 8hrs/day
1.6 days
Daily Consumption
600Wh
Usable Battery
960Wh
Recommended Equipment
* Calculations assume 85% inverter efficiency and 80% depth of discharge (LiFePO4).
Battery Runtime Examples
| Battery Size | Voltage | Runtime at 75W |
|---|---|---|
| 50Ah | 12V | 5.3 hours |
| 100Ah | 12V | 10.7 hours |
| 200Ah | 12V | 21 hours |
* Assumes 85% inverter efficiency and 80% depth of discharge for LiFePO4 batteries.
Electric Blanket Power Tips
- •Heating yourself is 10-20x more efficient than heating a room
- •Use the blanket to warm the bed, then turn off or to low setting
- •A 12V DC electric blanket is more efficient for car/RV use
- •75W on high, 25W on low - use low setting for all-night use
- •Layer a regular blanket on top to retain more heat
Frequently Asked Questions
How long will a battery run an electric blanket?
A 100Ah 12V battery can run a 75W electric blanket for about 10-12 hours on high, or 30+ hours on low setting. Perfect for overnight heating.
Are electric blankets safe to leave on all night?
Modern electric blankets with auto-shutoff are designed for overnight use. Avoid folding the blanket while on, and replace if wires feel uneven.
What size inverter for an electric blanket?
A 150-200W inverter is plenty. Electric blankets have no startup surge and draw modest power even on high setting.