Power Outlets in Mexico: Plug Types, Voltage and Whether You Need an Adapter

Power outlets in Mexico at a glance

Power outlets in Mexico take the same plugs you use at home. The wall sockets are Type A (two flat slots) and Type B (two flat slots over a round ground hole), they run at a nominal 127 volts and 60 Hz, and US chargers, laptops and phones plug straight into them with no adapter and no converter.

For most trips that's the whole answer.

Start with the shape of the socket, because that's what decides whether a plug fits. Mexican homes, hotels and offices use the same two outlet designs as the United States: the Type A outlet has two vertical slots and nothing else, while the Type B outlet adds a round hole below them for a grounding pin, and it accepts both kinds of plug (a two-blade plug simply leaves the round hole empty).

The one mismatch runs in the other direction. A three-prong plug won't go into a two-slot Type A outlet, because there's nowhere for the ground pin. Two-slot outlets are still in use, and meeting one is the single situation where a US traveler needs anything extra: a small 3-to-2 adapter, covered in the adapter section below.

It helps to sort your gear before you leave. Anything with two flat blades will work in any room in the country. Anything with a third, round prong needs the small adapter only where the wall has two slots. Anything bought outside North America needs a plug adapter, and possibly a converter, whatever the room looks like.

Canadians are in the same position as Americans, with the same plugs, the same frequency and the same answer on converters (none needed).

If you only remember one thing, make it this: two flat blades fit everywhere, and a round third prong fits only three-slot outlets (which is why the adapter section is short).

Voltage is the second thing people worry about, and it's the one that needs the least thought. Household supply in Mexico is 127 volts at 60 Hz; the US runs at 120 volts, also at 60 Hz. The gap is small, the frequency is identical, and nearly everything a traveler packs today (phone and laptop chargers, camera and toothbrush chargers) is built for a far wider range anyway. The voltage section below explains how to confirm that on your own gear in about ten seconds.

What's worth packing, then, isn't an adapter kit (the one small exception comes later) but a few inexpensive things that do more for a Mexico trip than any converter.

A compact power strip. Hotel rooms, especially older ones, often have fewer free outlets than you have devices, and one wall socket feeding three or four plugs solves it. A travel strip with USB-C ports lets a single outlet charge a phone, a watch and a camera battery overnight (a strip doesn't change voltage, and it doesn't need to).

Where you put the strip matters as much as what it is. Plug it into the socket nearest the bed or the desk, not the one behind the television, and you'll stop hunting for an outlet at midnight. In a shared room or a family suite, one strip per person ends the nightly queue for the only free socket. It also means your phone, watch and camera battery sit in one place when you pack up to leave, which is how chargers get left behind.

A power bank for the long days. Cenote trips, ruins and boat days keep you away from a socket for hours, and a phone used for maps and photos drains quickly in the heat, so pack a charged one in your carry-on, where it has to travel anyway: US rules require spare lithium batteries and power banks to travel in the cabin, never in checked bags, with a limit of 100 watt-hours per battery (larger packs of 101 to 160 Wh need the airline's approval, two at most). Most phone-sized power banks sit well under that line.

Airlines can set tighter limits than the federal rule, especially on the number of power banks per passenger, so check yours before you fly. Newer packs have their watt-hour rating marked on them; if yours shows only milliamp-hours, the manufacturer's page will list the Wh figure.

A car charger if you're driving (or taking a long transfer in a private van). Rental cars plug into the same kind of 12-volt socket you know from home, so the charger you already own will do; for routes, rentals and road rules, see our guide to getting around Mexico.

Power cuts are the other reality, so a charged power bank and a phone flashlight cover the gap; if you're traveling in the wet months, our guide to the best time to visit Mexico sets out when the storm season runs. Sensitive electronics such as a laptop are safer behind a surge-protected strip, which is cheap insurance against the spike when power comes back.

A few habits keep a trip running smoothly when the power flickers. Charge everything the night before a day trip rather than the morning of it. Keep the power bank topped up whenever you're near a socket, not only when it's empty. Unplug a laptop during a storm if you're not using it. None of this is special to Mexico, since it's simply how you look after electronics in a hot, humid country with summer storms.

Mexico's outlets also sit alongside the other practical questions of a first trip. Cash is the obvious one; our guide to currency and payments in Mexico covers ATMs, cards and when pesos beat dollars. If you land late and want to charge before the transfer, the Mexico airports guide covers the main terminals.

Do you need a power adapter for Mexico?

No, not if you're traveling from the United States or Canada, because a power adapter for Mexico changes only the shape of a plug and US plugs already have the right shape.

For US travelers, then, the real question is whether any of your plugs has three prongs, and whether your room has three-slot outlets. Visitors from elsewhere are a different case (and the one most online adapter guides are really written for). A traveler from the UK, Europe or Australia arrives with plugs that won't fit a Type A or Type B outlet at all, and needs a plug adapter for each device (or one universal adapter feeding a power strip). If that's you, the voltage section matters too, because devices built only for 220 to 240 volts won't run properly on Mexican household power.

When a Mexico adaptor plug still earns its place

The only Mexico adaptor plug a US traveler might want is a 3-to-2 adapter (sometimes sold as a grounding adapter or cheater plug). It lets a three-prong plug, such as some laptop bricks, gaming consoles and CPAP machines, go into a two-slot outlet by skipping the round ground pin. It costs a few dollars and weighs almost nothing (keep it in the same pouch as your charger so it doesn't get left in the wall).

Use it with care. The adapter bypasses the ground connection that the third prong provides unless its metal tab is screwed to a grounded outlet cover, so it's fine for a laptop charger but a poor idea for anything with a metal case that's plugged in near water. If a device matters, and a CPAP machine does, ask the hotel before you book for a room with three-slot outlets, or bring a short extension cord so you can reach one.

Polarized plugs are the other detail. On many two-blade US plugs one blade is wider than the other, so the plug goes in only one way round (that wider blade is the neutral side). A polarized two-blade plug also fits a grounded three-slot outlet, because the three-slot design keeps the same wide slot.

Choosing a travel adapter for Mexico

If Mexico is the only stop, skip the travel adapter for Mexico and spend the money on a good power strip, because a universal travel adapter makes sense only if the trip continues to Europe, the UK or Asia, where your plugs won't fit.

Travelers coming the other way have the opposite problem. A visitor from Europe needs a Type A plug adapter (or a Type B one for grounded plugs) to use home devices in Mexico, and the cheapest of those simply lets a two-pin plug sit in a two-slot socket. Buy it before you fly, because airport shops charge far more for the same small piece of plastic.

When you do buy one, look for three things: USB-C ports with enough wattage for your laptop, a fuse or surge protection, and pins that fold away. A travel adapter changes the plug shape only and never converts voltage (whatever the box implies), so a device that needs a converter still needs one with an adapter attached.

Mexico plug types: A and B

Mexico uses two plug types, A and B, and they're the North American standards. Mexico's own norm, NMX-J-163-ANCE, covers them, and in the US they go by their NEMA names: NEMA 1-15 for the two-blade Type A and NEMA 5-15 for the three-prong Type B. If you've plugged something in at home, you already know both plug types in Mexico.

A Mexican outlet looks like the one in your kitchen: a white or ivory plate, usually with two sockets, each showing either two vertical slots or two slots above a round hole. The only real variation is age and wear, since older plates may be loose or cracked, and it's worth avoiding any socket that looks scorched or wobbles when you push a plug in.

The two-blade Mexico power plug (Type A)

The Type A plug is the flat two-blade plug on most phone chargers and small electronics. It's ungrounded, it fits both Mexican outlet types, and that makes it the least fussy Mexico power plug you can carry (the charger in the photo is a typical example).

Look closely at the blades. On a polarized Type A plug the neutral blade is 7.9 mm wide and the other is 6.3 mm, so it can go in only one way. Many small chargers use two equal blades instead, and those fit either way round.

That's also why an older two-blade plug sometimes seems stuck: turned the wrong way, the wide blade can't enter the narrow slot. Flip it and it slides in, whereas forcing it only bends the blades.

The grounded Type B plug and three-slot outlet

The Type B plug adds a round grounding pin below the two blades, and you'll find it on laptop bricks, kettles, some hair tools and anything with a metal body. It needs a Type B outlet, the three-slot kind with the round hole (a Type B outlet also takes the two-blade plugs).

Three-slot outlets accept both plug types. The friction comes only in a room with two-slot outlets, where a Type B plug has nowhere to go. That's the job of the 3-to-2 adapter from the section above, or of a power strip plugged into the one three-slot socket the room does have.

If you're not sure which outlet a room has, look for the round hole. No hole means two-slot Type A, and three-prong plugs won't fit there without the adapter.

Voltage in Mexico and when you need a converter

The voltage in Mexico is 127 volts at 60 Hz in homes and hotels, and 220 volts is used in commercial and industrial settings. The US standard is 120 volts at 60 Hz. The frequency is identical.

A voltage converter changes 220 to 240 volts into the 110 to 120 volts that American appliances expect, which is the problem of a US traveler heading to Europe.

The label settles it for any device in about ten seconds, and chargers for phones, laptops, tablets, cameras and electric toothbrushes usually read INPUT 100-240V, 50/60Hz, which means the device adapts to any mains supply in the world, Mexico included.

Hair tools are the only devices worth a second look. A hair tool bought in Europe or the UK and rated only for 220 to 240 volts needs a step-up converter in Mexico, and one big enough for it is heavy. Most hotels provide a hair dryer, which is usually the simpler fix.

Mexico's household supply is rated a little higher than the US 120 volts, but both countries use the same North American system. The frequency (60 Hz), the part that affects clocks, timers and some motors, is identical.

If you do need a voltage converter for Mexico because a device is 220 to 240 volts only, buy a step-up converter rated above the device's wattage, which is printed on the same label. A small travel converter handles a shaver or a charger, while a hair dryer needs a much heavier unit and replacing the dryer is often cheaper.

Outlets in Cancun, Mexico City and older buildings

Power outlets in Mexico's Cancun hotel zone are the same Type A and Type B sockets as everywhere else in the country. The practical issue in a resort room is quantity, not type (outlets tend to sit behind the bed or across the room from where you want to charge, so a power strip earns its place in the bag).

Mexico City outlets follow the same national standard. If you rely on a three-prong device, bring the 3-to-2 adapter and check the room before you unpack.

Holiday rentals are the least predictable. Asking the host which outlets the rooms have takes one message and saves a hunt for a store on arrival.

A sensible rule for any older building: plug into sockets that hold the plug firmly, and don't force a plug into one that resists. Our guide to whether Mexico is safe to visit covers the wider picture for city stays.

Mexico vs US outlets: what matches and what does not

Does Mexico have the same outlets as the US? Yes, the shapes, the plug types and the frequency are identical, and the two things that differ call for no special gear at all.

The first difference is the slightly higher voltage. The second is how often you'll meet two-slot outlets. A three-prong plug is always safe to plug into a three-slot socket, so the real mismatch is a Type B plug meeting a Type A outlet.

That's the whole list, and it's why Mexico is one of the easiest countries for an American to pack for: the same chargers, no converter and at most one small adapter. For other easy wins on the same trip, our guide to tipping in Mexico covers the cash side.

Final Thoughts

Power outlets in Mexico are the least of a US traveler's worries. The sockets take Type A and Type B plugs, the supply is 127 volts at 60 Hz (close to the 120 volts at home), and everything you charge at home charges here without an adapter or a converter.

Pack for the rooms, not the voltage.

A compact power strip with USB ports solves the shortage of outlets in most hotel rooms, a power bank in your carry-on covers long days away from a wall, and a 3-to-2 adapter covers the one case that needs it: a three-prong plug meeting a two-slot outlet in an older building. Read the INPUT line on any device you're unsure about, and spend the saved space on something more useful for the beach.

FAQ: Power Outlets in Mexico

Related Guides

• Currency and Payments in Mexico: Cash, Cards and ATMs
• Getting Around Mexico: Transportation, Buses, Flights, Taxis and Car Rentals
• Mexico Airports Guide: Best Airports to Fly Into
• Best Time to Visit Mexico
• Tipping in Mexico: How Much to Tip at Resorts, Restaurants and Tours