What Size Voltage Converter Do You Need for a Hair Dryer?
If your hair dryer is made only for US power, you need a voltage converter to use it in most other countries. But not just any converter. The size that matters is watts, and hair dryers use a lot of them. Here's how to match the two.
Step 1: Check if you need a converter at all
Look at the label on the dryer's handle or the tag on its cord.
- "100-240V" or a voltage switch means the dryer is dual voltage. You only need a plug adapter. No converter.
- "120V" or "125V" only means single voltage. In a country that runs at 220 to 240 volts, you need a converter or a different dryer.
If you're not sure, don't plug it in. A single-voltage dryer on 230V can overheat, burn out or worse.
Step 2: Find the watts
The same label shows the dryer's power, written as a number with a W. Many full-size US dryers say 1875W. Smaller travel dryers can be 1000W to 1600W.
Write the number down. That's the number your converter has to beat.
Step 3: Pick a converter rated above it
The converter's outlet must be rated for more watts than the dryer uses. Not the same. Not close. More.
- A 1875W dryer needs an outlet rated for at least 2000W.
- A 1000W travel dryer still needs a converter rated above 1000W if it's single voltage.
Many small "travel converters" are rated for only 200 to 300 watts. They're meant for chargers, shavers and other low-power gear. Some listings, like FOVAL's 230W model, say outright not to use them with hair dryers or heaters. A hair dryer on one of these will trip its shut-off at best.
Some makers also suggest leaving extra room. VEVOR's heavy-duty transformer listing, for example, recommends picking a converter with a load rating at least 25% higher than the total power of your devices.
Step 4: Watch the total, not just one outlet
Converters with several outlets list their limits in one of two ways:
- Separate limits per outlet. The Ceptics 2000W converter has one 2000W outlet for the dryer and two 200W outlets for a flat iron and curling iron. Each tool gets its own limit.
- One shared total. Some converters say "do not exceed 2000W total output." A 1875W dryer plus a flat iron together can go over that limit, so you'd use them one at a time.
Read the listing to see which kind you have.
Step 5: Read the "not for" list
Converter listings often include warnings you shouldn't skip:
- No Dyson or digital dryers. The Ceptics and BESTEK converters both say they won't work with Dyson or other electronic hair dryers.
- Input voltage limits. Some converters only work on 220 to 240V power. Ceptics notes its 2000W port won't operate when the input is 100 to 125V. That matters if your trip includes Japan, which runs at 100V.
- Not for motors. Some listings warn against blenders, vacuums and other motor appliances, which pull extra power when they start.
Quick sizing table
| Your dryer says | What you need |
|---|---|
| 100-240V or has a voltage switch | Plug adapter only |
| 120V, 1000W | Converter outlet rated above 1000W |
| 120V, 1875W | Converter outlet rated 2000W or more |
| Dyson or digital dryer | Check the maker's rules; most converters exclude them |
When a converter isn't worth it
A 2000W converter weighs a pound or more. If you only need to dry your hair, a dual-voltage travel dryer can be lighter and simpler, since it needs only a plug adapter. A converter makes more sense if you want to bring your own dryer, or if you also have a single-voltage flat iron or curling iron.
For five options compared, see our travel adapter for hair dryers comparison.