Voltage Calculator
Check if your electrical devices will work abroad. Calculate voltage and frequency compatibility to avoid damage to your electronics.
1W1500W3000W
Common: Phone charger (5W), Laptop (65W), Hair dryer (1800W)
Select both countries to calculate voltage compatibility
📱 Common Device Examples & Power Requirements
✅ Dual Voltage (Safe Worldwide)
iPhone/Android charger5-20W
MacBook/Laptop charger45-100W
Camera battery charger10-15W
Electric toothbrush1-3W
Nintendo Switch charger39W
Look for "INPUT: 100-240V" on the power adapter
⚠️ Check Before Using
Hair dryer1200-1800W
Hair straightener20-50W
Electric shaver5-15W
Coffee maker (travel)600-1000W
Iron (clothing)1000-1800W
Often single voltage - check label carefully
❌ Need Voltage Converter
US hair dryer (120V only)1800W
Curling iron (120V only)25-40W
Old stereo system50-200W
Small kitchen appliances300-1500W
Vintage electronics10-100W
Will be damaged without proper voltage converter
🌍 Voltage by Region
110-127V Countries
North & Central America, Japan
🇺🇸 United States (120V)🇨🇦 Canada (120V)🇯🇵 Japan (100V)🇲🇽 Mexico (127V)🇨🇺 Cuba (110V)🇭🇳 Honduras (110V)
220-240V Countries
Europe, Asia, Africa, Oceania
🇬🇧 United Kingdom (230V)🇩🇪 Germany (230V)🇦🇺 Australia (230V)🇮🇳 India (230V)🇨🇳 China (220V)🇿🇦 South Africa (230V)
⚡ Understanding AC Frequency
50Hz Countries
Most of the world
🌍 All of Europe
🌏 Most of Asia (except Japan/Taiwan)
🌍 All of Africa
🌏 Australia & New Zealand
60Hz Countries
Americas and some Asia-Pacific
🌎 North & South America
🇯🇵 Japan
🇹🇼 Taiwan
🇵🇭 Philippines
Impact: Frequency mainly affects motors, clocks, and some appliances. Digital devices (phones, laptops) are generally unaffected.
🧳 Real Travel Scenarios & Solutions
✅ Easy Trips (Just Need Plug Adapter)
🇺🇸→🇨🇦
US to Canada: Same voltage (120V), same plugs.No adapter needed!
🇬🇧→🇩🇪
UK to Germany: Both 230V, modern devices work.Just need plug adapter
🇦🇺→🇮🇳
Australia to India: Both 230V, 50Hz.Plug adapter only
❌ Challenging Trips (Need Converters)
🇺🇸→🇬🇧
US to UK: 120V→230V jump.Hair tools need converter
🇪🇺→🇺🇸
Europe to US: 230V→120V drop.Appliances may work slowly
🇯🇵→🇪🇺
Japan to Europe: 100V→230V major jump.High risk without converter
💡 Professional Travel Tips
🔍 Before You Pack
- • Check every device label for "INPUT" voltage range
- • Download this tool offline for airport reference
- • Research hotel amenities (some provide adapters)
- • Buy adapters at home (airport prices are 3-5x higher)
🎒 Smart Packing
- • Universal adapters cover 90% of travel needs
- • Bring USB power bank for device charging
- • Pack dual-voltage hair tools if needed
- • Consider local phone charger purchase for long stays
⚠️ Safety First
- • Never force plugs that don't fit easily
- • Unplug devices if they feel hot or make noise
- • Quality adapters prevent electrical fires
- • When in doubt, ask hotel staff for advice
Understanding Voltage Compatibility
✅ Safe Scenarios
- • Same voltage (±10V tolerance)
- • Dual voltage devices (100-240V)
- • Modern phone/laptop chargers
- • Cameras and small electronics
⚠️ Need Converters
- • Hair dryers (120V only → 220V country)
- • Curling irons and straighteners
- • Small kitchen appliances
- • Older electronics (single voltage)
💡 Pro Tip
Look for "INPUT: 100-240V" on your device's label or power adapter. If you see this, your device is dual voltage and safe to use worldwide with just a plug adapter.
Common Voltage Standards
110-120V Countries
Lower voltage standard
- • United States
- • Canada
- • Japan (100V)
- • Some Caribbean islands
220-240V Countries
Higher voltage standard
- • Most of Europe
- • United Kingdom
- • Australia
- • Most of Asia & Africa
Frequency
AC frequency standards
- • 60Hz: Americas, parts of Asia
- • 50Hz: Europe, most of world
- • Affects motors & clocks
- • Most electronics unaffected