Multimeter Symbols Explained Every Symbol on a Multimeter (Plain English Guide)

You’re holding a multimeter, but the symbols on the dial make no sense. You can see numbers, letters, and random shapes, but which one do you actually turn it to?

Multimeter symbols are shorthand codes that tell you what the meter is measuring: voltage, current, resistance, continuity, and more. Once you know what each symbol means, setting up a multimeter takes about 10 seconds.

This guide covers every symbol on a multimeter in plain English, no electronics degree needed. Whether you’re stuck on the multimeter continuity symbol, trying to decode the DC/AC markings, or just want to know what that horseshoe shape means, it’s all here.

Find your symbol. Get your answer. Get back to work.

👉 New to multimeters entirely? Start here: How to Use a Multimeter →

All Multimeter Symbols Explained Quick Reference Chart

Every symbol you’ll find on a multimeter dial is explained in plain English. Bookmark this — it’s the only reference you’ll need.

💡 Two symbols you’ll use 90% of the time: V⎓ for DC voltage (batteries, car circuits) and ⟩)⟩ for continuity (checking wires and fuses). Start there.

Want This as a Printable Cheat Sheet?

Download the Multimeter Symbols Cheat Sheet (PDF) Free All 13 symbols on one page. Print it. Stick it in your toolbox. Never guess again.

⬇ Download Free PDF Cheat Sheet →

Voltage Symbols on a Multimeter (ACV, DCV, VAC, VDC)

Voltage is what you’ll measure most. The confusing part? Different multimeter brands label the same settings differently. Here’s what they all mean.

AC Voltage — V~ or ACV or VAC

V~, ACV, and VAC all mean exactly the same thing: your multimeter is set to measure alternating current voltage.

Use this setting when testing anything powered by a wall outlet plug, light switches, extension leads, or mains-powered appliances. In most homes, that means you’re working with 120V (US) or 230V (UK/EU).

⚠️ Safety first: AC voltage from a wall outlet can kill. Double-check your probe connections before you touch anything live. Red to Live, Black to Neutral — always.

The AC symbol on a multimeter is the tilde (~) or a small wave line because AC power flows in waves, not a straight line.

DC Voltage — V⎓ or DCV or VDC

V⎓, DCV, and VDC all mean the same thing: your multimeter is set to measure direct current voltage.

This is the setting you’ll use for car batteries, phone chargers, USB ports, solar panels, and anything running on batteries. If it uses a battery or a DC adapter, this is your setting.

The DC symbol on a multimeter is a straight solid line with a dashed line beneath it — because DC power flows in one constant direction.

💡 Quick rule: Wall outlet = V~ | Battery or car = V⎓. That covers 90% of what most people test.

What Is the Difference Between AC and DC Voltage?

AC voltage constantly reverses direction; it’s what comes out of your wall. DC voltage flows in one steady direction; it’s what batteries produce. Your multimeter measures both, but you have to tell it which one you’re dealing with first. Pick the wrong setting, and you’ll get a zero reading or damage the fuse on older meters.

👉 Want the full breakdown? AC vs DC Voltage Explained →

Current Symbols on a Multimeter (DCA, ACA, mA, μA)

Current symbols trip people up more than any other setting, mostly because of one mistake that blows the multimeter’s fuse every time. Here’s everything you need to know before you touch the dial.

DC Current — A⎓ or DCA

A⎓ and DCA mean the same thing; your multimeter is set to measure direct current flowing through a circuit.

Use this when measuring current draw in car circuits, battery-powered electronics, LED strips, or anything running off DC power. Unlike voltage testing, current measurement requires you to break the circuit and put the multimeter in series with the current that actually flows through the meter.

The DC symbol on a multimeter here works the same way as DC voltage, a solid line over a dashed line, paired with the letter A for amps.

AC Current — A~ or ACA

A~ and ACA mean the same thing — your multimeter is measuring alternating current through a circuit.

Most basic multimeters don’t include this setting. If yours doesn’t have it, that’s normal. AC measurement is less common in everyday testing and usually requires a clamp meter instead.

The AC symbol on a multimeter for current uses the same wave (~) as AC voltage, just paired with A instead of V.

mA and μA Milliamps and Microamps

This is where most beginners make a costly mistake, and it’s worth paying close attention.

mA = milliamps, one thousandth of an amp. Used for measuring small currents in low-power electronics, sensors, and microcontrollers.

μA = microamps, one millionth of an amp. Used for ultra-low power circuits like certain medical devices or precision electronics.

The critical thing to understand: your multimeter has a separate input port for mA/μA, it’s not the same port as the regular A setting. Plugging into the wrong port and selecting the wrong multimeter symbol is the fastest way to blow your meter’s internal fuse.

⚠️ Golden rule: Always check which port your red probe is plugged into before measuring current. Wrong port = blown fuse every time, no exceptions.

👉 Ready to measure current properly? How to Measure Current with a Multimeter →

Resistance Symbol (Ω) and Continuity Symbol on a Multimeter

Two of the most used settings on any multimeter. One measures how much a component resists current. The other tells you instantly if a circuit is complete or broken. Here’s both — clearly.

Resistance — The Omega Symbol (Ω)

Ω is the Greek letter Omega, and on a multimeter, it means resistance, measured in ohms.

Use this setting when checking resistors, testing whether a wire has resistance it shouldn’t, or verifying component values in a circuit board. The lower the number, the less resistance. A reading of zero means no resistance at all the current flows freely.

Most multimeters give you multiple Ω ranges: 200Ω, 2kΩ, 20kΩ, and so on. If you see OL on the display, the resistance is higher than your selected range, switch up to the next one.

Continuity Symbol: What Does It Look Like?

The multimeter continuity symbol is one of three things, depending on your brand, and all three mean the same setting:

• ⟩)⟩ — a sound wave icon (most commonly found on Fluke, Klein, and most digital meters)
• →| — a diode arrow symbol (used on some budget and mid-range meters)
• Both together on the same dial position very common on mid-range meters

In plain English, continuity mode checks if electricity can flow from point A to point B without interruption. No broken wire. No blown fuse. No faulty switch. Just a complete path or not.

💡 On many meters the Ω and continuity symbol share the same dial position. Hold the button or toggle between modes once you’ve selected it.

What Does a Beep Mean on a Multimeter?

The beep means the circuit is complete current can flow between the two points you’re testing.

That’s it. It doesn’t tell you the resistance value. It doesn’t tell you the wire is in good condition. It simply confirms a connection exists. No beep means the circuit is open, something is broken, disconnected, or blown somewhere between your two probes.

⚠️ Important: A beep confirms continuity not quality. A wire can beep and still have high resistance that causes problems under load. For full confidence, follow up with an Ω resistance reading too.

Diode Symbol on a Multimeter: What It Means and When to Use It

The diode symbol on a multimeter looks like an arrow pointing into a vertical line — →| — and it tests whether a diode is working correctly and allowing current to flow in the right direction.

Most beginners won’t use this setting often. But knowing what the symbol means stops you from accidentally selecting it when you meant to use continuity mode.

💡 Worth knowing: On most multimeters the diode symbol and the continuity symbol share the exact same dial position. One press selects continuity press again and it switches to diode test mode. Two different functions, one dial spot.

How to Use the Diode Test Setting

Using the diode test is straightforward:

• 🔴 Red probe → Anode (positive side of the diode)
• ⚫ Black probe → Cathode (negative side, the side with the line or band)

A healthy diode shows a reading between 0.4V and 0.7V, which is the forward voltage drop. Current flows one way, as it should.

A faulty diode shows one of two things: either OL (open circuit, diode is blown) or 0.000 (short circuit, diode is shorted). Either way, the diode needs replacing.

No beep here, unlike continuity mode, the diode test gives you a voltage number, not a sound.

Capacitance Symbol on a Multimeter

The capacitance symbol on a multimeter looks like this ⊣⊢ : two parallel lines facing each other, representing the two plates inside a capacitor.

It measures how much electrical charge a capacitor can store, displayed in farads (F), microfarads (μF), or nanofarads (nF).

If you can’t find this symbol on your multimeter, that’s completely normal. You haven’t missed it.

Which Multimeters Have a Capacitance Setting?

Not all of them. Simple and straightforward:

• Budget multimeters under $20 rarely include capacitance
• Mid-range multimeters ($30–$80), some include it, some don’t
• Professional multimeters $80+ almost always included

If capacitance testing matters to your work, electronics repair, checking old capacitors on circuit boards, or HVAC diagnostics, it’s worth upgrading to a meter that includes it.

For most beginners doing basic home or car electrical checks, you won’t need it. Don’t let a missing multimeter symbol make you think your meter is broken or incomplete.

Other Multimeter Symbols NCV, HFE, Hz, and OL Explained

These four symbols get the most Google searches — because most multimeter guides don’t bother explaining them. Here’s everyone, in plain English.

NCV ( Non-Contact Voltage Detector)

NCV on a multimeter means Non-Contact Voltage it detects live voltage in a wire without you touching the wire at all.

Point the tip of the multimeter near a cable, socket, or switch. If voltage is present, the meter beeps or flashes. No probes. No contact. No risk.

It’s the fastest safety check in electrical work. Use it before touching any wire you’re not 100% sure is dead.

HFE ( Transistor Gain Test )

HFE on a multimeter measures transistor gain: specifically, how much a transistor amplifies current.

You’ll only use this if you work with electronics at the component level. Most beginners never touch it. If your meter has a small socket panel labeled HFE with holes marked B, C, and E, that’s where the transistor legs plug in for testing.

Hz Frequency Measurement

Hz on a multimeter measures frequency — how many times per second an electrical signal completes a full cycle.

Use it for checking motors, generators, inverters, and signal outputs. Standard mains power runs at 50Hz (UK/EU) or 60Hz (US). If your Hz reading is way off those numbers on a mains circuit, something is wrong.

OL: What Does OL Mean on a Multimeter?

OL means Overload. The value you’re measuring is higher than the range you’ve selected.

That’s it. It’s not a fault. It’s not broken. It simply means: switch to a higher range and measure again.

💡 Example: Testing a 240V outlet on the 200V range will show OL instantly. Switch to the 600V range and the reading appears correctly.

👉 See the full explanation: What Does OL Mean on a Multimeter? →

CAT Ratings on a Multimeter: What Do They Mean?

CAT stands for Category. It’s a safety rating that tells you the maximum electrical environment your multimeter is designed to handle safely.

The higher the CAT number, the more dangerous the electrical environment it can protect you in. Using a low-rated meter in a high-voltage environment isn’t just a bad reading; it’s a genuine safety risk.

Here’s the full breakdown:

CAT I — Low Voltage Electronics

CAT I covers low-energy, low-voltage work, such as circuit boards, battery packs, and signal testing. The electrical energy here is limited, so the risk of a dangerous fault is minimal. Most electronics hobbyists work here.

CAT II — Household Appliances and Sockets

CAT II covers standard household outlets and plug-in appliances, the most common environment for home DIYers. Testing a wall socket, checking a lamp, or measuring voltage at a plug? You’re in CAT II territory. Any multimeter you use for home electrical work should be rated CAT II minimum — no exceptions.

CAT III — Fixed Building Wiring

CAT III covers fixed building installations, consumer units, distribution boards, hard-wired lighting circuits, and three-phase wiring. The energy available here is significantly higher than that of a wall socket. If you’re working at a fuse board or testing fixed wiring, you need a CAT III-rated meter. A CAT II meter here is a risk not worth taking.

CAT IV Utility and Industrial Supply

CAT IV covers the highest energy environments, such as electricity supply meters, outdoor utility feeds, and industrial power systems. This is professional electrician and utility worker territory. The fault energy at this level can be lethal. Only use a CAT IV-rated multimeter if your work genuinely requires it.

🔧 Recommendation for home DIY users: A CAT II or CAT III multimeter covers everything you’ll realistically encounter wall sockets, appliances, consumer units, and car electrics. Don’t go below CAT II for anything involving mains voltage.

👉 Not sure which multimeter to buy? Best Multimeters for Home and Auto Use →

Frequently Asked Questions About Multimeter Symbols

What is the continuity symbol on a multimeter?

The multimeter continuity symbol is either a sound wave icon ⟩)⟩, a diode arrow →|, or both combined on the same dial position, depending on your brand. Select it, touch your probes to both ends of a wire or component, and listen. A beep means the circuit is complete. No beep means something is broken.

What do ACV and DCV mean on a multimeter?

ACV multimeter meaning: Alternating current voltage, used for testing wall outlets, mains-powered appliances, and light switches. DCV multimeter, meaning direct current voltage, is used for testing car batteries, phone chargers, and anything battery-powered. Same meter, two completely different electrical worlds. Always confirm which one you’re dealing with before you select a setting.

What does OL mean on a multimeter?

OL on a multimeter means Overload:

The reading exceeds the range you’ve currently selected. It’s not a fault with the meter, and it’s not a fault with the circuit. Simply switch up to the next range and measure again. The correct reading will appear immediately.

What does NCV mean on a multimeter?

NCV on a multimeter means Non-Contact Voltage:

which detects live electrical voltage without your probes ever touching the wire. Hold the meter tip near any cable or socket. A beep or a light means voltage is present. It’s the fastest and safest way to check if something is live before you work on it.

Why doesn’t my multimeter have a capacitance symbol?

Because not every multimeter includes it, and that’s completely normal. Budget meters under $20 rarely have a capacitance setting. Mid-range meters sometimes do. If your dial doesn’t show the ⊣⊢ symbol, your meter simply wasn’t built with that function. You haven’t missed it it’s just not there.

What CAT rating do I need for home use?

For standard home DIY work — testing wall sockets, checking appliances, measuring car battery voltage, a CAT II or CAT III rated multimeter is everything you need. CAT II covers outlets and plug-in devices. CAT III covers consumer units and fixed wiring. Never use a CAT I meter on mains voltage.

👉 Not sure which meter to buy? Best Multimeters for Home and Auto Use →

📖 Want the full step-by-step guide? How to Use a Multimeter — Complete Beginner’s Guide →