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Travel Adapter Calculator — Plug Type & Voltage Finder

Find the right plug adapter and check voltage compatibility for your trip

Travel Adapter

Required

Voltage

230V

Converter

Needed

Devices

3

Adapter Required

Your Type A/Type B plugs won't fit Type G outlets.

Voltage Converter Needed

120V/60Hz → 230V/50Hz

Devices needing converter:
  • Hair dryer (1500W)
Destination Plug Types
Type G

UK, Ireland, Singapore, Malaysia

Total Device Wattage1570W

Get a converter rated for at least 1884W (20% safety margin).

Frequently Asked Questions

Q

Do I need a travel adapter or a voltage converter?

A travel adapter changes the plug shape to fit foreign outlets ($5–$15). A voltage converter changes the electrical voltage ($20–$60). Most phone chargers, laptops, and camera chargers are dual-voltage (100–240V) and only need an adapter. Hair dryers, curling irons, and other heated appliances usually need a converter.

  • Adapter: changes plug shape, does NOT change voltage ($5–$15)
  • Converter: changes voltage from 220V to 110V or vice versa ($20–$60)
  • Dual-voltage devices (100–240V): only need adapter
  • Single-voltage devices (120V only): need both adapter + converter
  • Check the label on your charger for "Input: 100–240V"
Device TypeTypically Dual-Voltage?Adapter Only?Converter Needed?
Phone/tablet chargerYesYesNo
Laptop chargerYesYesNo
Camera chargerYesYesNo
Hair dryerRarelyNoYes (1500–1800W)
Electric shaverUsuallyYesUsually no
Q

What are the main plug types around the world?

There are 14 plug types (A through N) used globally. North America uses Type A/B (flat pins), Europe uses Type C/F (round pins), the UK uses Type G (3 rectangular pins), and Australia uses Type I (angled flat pins). A universal adapter covers Types A, B, C, F, G, and I—enough for 90% of countries.

  • Type A/B: USA, Canada, Mexico, Japan (flat pins, 120V)
  • Type C/F: Europe, South America, Asia (round pins, 230V)
  • Type G: UK, Ireland, Singapore, Malaysia (3 rectangular pins, 230V)
  • Type I: Australia, China, Argentina (angled flat pins, 230V)
  • Universal adapter covers A/B/C/F/G/I = 150+ countries
Q

What voltage do different countries use?

The world splits into two voltage standards: 110–127V (North America, Japan, some of South America) and 220–240V (Europe, Asia, Africa, Australia). Japan is unique at 100V. Brazil varies between 127V and 220V depending on the region. The frequency is either 50 Hz or 60 Hz.

  • 110–127V / 60 Hz: USA, Canada, Mexico, Japan, Brazil (partial)
  • 220–240V / 50 Hz: Europe, UK, Australia, Asia, Africa
  • Japan: 100V (lowest in the world)
  • Brazil: 127V in some states, 220V in others
  • Dual-voltage devices handle both automatically
Q

Can I use my hair dryer or curling iron abroad?

Most hair dryers and curling irons are single-voltage (120V) and draw 1,000–1,800 watts. Plugging them into a 220V outlet without a converter will burn out the motor instantly. Options: buy a dual-voltage travel version ($20–$40), get a heavy-duty converter rated for 1,800W+ ($40–$60), or buy a local one at your destination.

  • Most hair dryers are 120V only and draw 1,000–1,800W
  • Plugging 120V device into 220V = instant damage
  • Dual-voltage travel hair dryers: $20–$40
  • Heavy-duty converter (1,800W+): $40–$60, heavy and bulky
  • Many hotels provide 220V hair dryers in the bathroom
Q

What is the best universal travel adapter?

A good universal adapter covers plug types A, B, C, E, F, G, and I, has USB-A and USB-C ports, supports up to 10A/2,500W, and includes surge protection. Top options cost $15–$35. Avoid cheap $5 adapters without surge protection — they risk damaging your electronics.

  • Must cover: Types A, B, C, E/F, G, I (90%+ of countries)
  • USB ports: at least 2x USB-A + 1x USB-C for charging
  • Rating: minimum 6A (1,380W at 230V), ideally 10A (2,300W)
  • Surge protection: essential for expensive electronics
  • Price: $15–$35 for quality, avoid under $10

Example Calculations

1US Traveler Going to UK with Phone, Laptop, and Hair Dryer

Inputs

Home CountryUnited States (Type A/B, 120V)
DestinationUnited Kingdom (Type G, 230V)
Phone Charger5W, dual-voltage
Laptop65W, dual-voltage
Hair Dryer1500W, single-voltage

Result

Adapter RequiredYes
Converter NeededYes (hair dryer)
Voltage Difference120V → 230V
Total Wattage1,570W

US Type A/B plugs do not fit UK Type G outlets, so an adapter is required. The phone and laptop are dual-voltage and only need the adapter. The hair dryer (1500W, 120V only) needs a voltage converter rated for at least 1,800W.

2US Traveler to Japan with All Dual-Voltage Devices

Inputs

Home CountryUnited States (Type A/B, 120V)
DestinationJapan (Type A/B, 100V)
Phone Charger5W, dual-voltage
Laptop65W, dual-voltage

Result

Adapter RequiredNo
Converter NeededNo
Voltage Difference120V → 100V
Total Wattage70W

Japan uses the same Type A/B plugs as the US, so no adapter is needed. Both devices are dual-voltage (100–240V), so they handle Japan's 100V automatically. No converter required.

Formulas Used

Adapter Compatibility Check

Needs Adapter = Home Plug Types ∩ Destination Plug Types = ∅

If your home plug types have no overlap with the destination plug types, you need an adapter.

Where:

Home Plug Types= Plug types used in your home country (e.g., Type A, B for US)
Destination Plug Types= Plug types used at your destination (e.g., Type G for UK)

Voltage Converter Requirement

Needs Converter = |Home Voltage − Dest Voltage| > 20V AND Device is Single-Voltage

If the voltage difference exceeds 20V and your device is not dual-voltage, you need a converter.

Where:

Home Voltage= Standard voltage in your home country (e.g., 120V for US)
Dest Voltage= Standard voltage at destination (e.g., 230V for UK)
Single-Voltage= Device only accepts one voltage range (e.g., 120V hair dryer)

Converter Wattage Rating

Min Converter Rating = Total Device Wattage × 1.2

The converter should be rated at least 20% above your total device wattage for safety.

Where:

Total Device Wattage= Sum of wattage for all devices needing the converter
1.2= 20% safety margin to prevent overloading

Complete Guide to Travel Adapters and Converters

1

Adapter vs Converter: Key Differences

A travel adapter physically changes the shape of your plug to fit a foreign outlet. It does not change the voltage or frequency of the electricity. Think of it like a translator for plug shapes — the electricity stays the same. Adapters cost $5–$15 and are all most travelers need.

A voltage converter transforms the electrical voltage (e.g., from 230V down to 120V). High-wattage devices like hair dryers, curling irons, and electric kettles typically require converters because they are designed for a specific voltage. Converters are heavier, more expensive ($20–$60), and rated by maximum wattage.

Key differences between travel adapters and voltage converters
FeatureAdapterConverter
What it doesChanges plug shapeChanges voltage
Cost$5–$15$20–$60
Weight50–100g200–1,000g
When neededDifferent plug typesDifferent voltage + single-voltage device
2

How to Check If Your Device Is Dual-Voltage

Look at the fine print on your charger or device label. If it says "Input: 100–240V, 50/60Hz" it is dual-voltage and works worldwide with just an adapter. Most modern phone chargers, laptop adapters, and camera chargers are dual-voltage. If it says "Input: 120V" only, it needs a converter for 220–240V countries.

When in doubt, check the manufacturer's website or contact support. Using a 120V device on 230V without a converter will likely blow the fuse, damage the heating element, or cause a fire. The opposite (230V device on 120V) usually just means the device runs at reduced power or not at all.

  • Check charger label for "Input: 100–240V" (dual-voltage)
  • Phone chargers: almost always dual-voltage
  • Laptop chargers: almost always dual-voltage
  • Hair dryers/irons: usually single-voltage (120V only)
  • When uncertain, buy a dual-voltage travel version of the device

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Last Updated: Mar 25, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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