How to Read Electric Meter – Complete Guide for All Meter Types

Standing in front of an electric meter and not knowing which numbers to write down is a common experience. The good news is that the process follows the same core principles whether you have a modern smart display or an older analog dial. This guide covers all major meter types found in UK homes, the buttons you may need to press, and what those figures actually mean for your bill.

Regardless of the meter model, the reading you need is always the main usage figure displayed in kilowatt-hours (kWh). Red numbers, digits after a decimal point, and leading zeroes should all be ignored. If your tariff uses two rates — typically a day and a night rate — you will need to record both. The exact sequence of buttons varies, but the goal remains the same: find the whole-number kWh figure your supplier asks for.

This article draws on guidance from Smart Energy GB, Octopus Energy, British Gas, EDF Energy, and Citizens Advice to give you a single, comprehensive reference for reading any electric meter in the UK.

How to Read a Digital Electric Meter

Digital meters are the most widespread type in UK homes. They display a single row of numbers on an LCD screen. The procedure is straightforward, but one detail trips up many people: the red digit on the far right.

• Most common mistake: including the red (ignored) digit or reading dials in the wrong direction.
• Smart meters with A/B buttons often require holding the button for 2+ seconds to wake the screen.
• British Gas and Octopus smart meters have slightly different display cycles; check your supplier guide if unsure.
• Dial meters: if the pointer is exactly on a number, write down that number — not the lower one. This is a frequent point of confusion.
• Timing tip: submitting a reading within two days of your billing date helps ensure an accurate bill.

How to read a standard digital meter with a single display

Look at the row of numbers on the screen. Write them down from left to right. If the last number on the right is shown in red or has a different background, do not include it. That digit typically represents a tenth of a kWh or is used for testing purposes. Only the main black-and-white digits form your reading.

How to read an electric meter with A and B buttons

This layout appears in guidance from Smart Energy GB, EDF, Octopus, and others. Press the A button and keep pressing it until the screen shows TOTAL ACT IMPORT. The number displayed below or next to that label is your meter reading. Ignore leading zeroes and anything after the decimal point. If your supplier asks for a day/night split, some models will cycle through Rate 01 Act Imp and Rate 02 Act Imp.

What numbers do I need to write down on a digital meter?

Write down only the whole numbers before the decimal point. If your display shows 12345.6 kWh, you record 12345. The same rule applies to meters that show leading zeroes — those can be omitted. Your supplier expects the exact whole-number kWh figure.

How to Read a Smart Electric Meter

Smart meters automatically send readings to your supplier in most cases, but there are still times when you need to read the display yourself — for example, if the remote connection fails or you want to check your usage.

How to wake up a smart meter display

Many smart meters have a screen that dims or turns off to save power. Press any button to wake it. On the common green A / white B layout, pressing the white B button wakes the screen. If the display shows meter boost, press A and select no to exit that menu.

How to cycle through smart meter screens using the A button

Press and hold the green A button for at least two seconds. Then press A repeatedly until you see a reading followed by kWh. For two-rate tariffs, continue pressing until you find Rate 01 Act Imp (usually night/off-peak) and Rate 02 Act Imp (usually day/peak). Record both if your supplier requests them.

How to read a British Gas smart meter that only shows electricity

British Gas smart meters follow the same general A/B button procedure. Write down the five numbers displayed from left to right, ignoring any red digits. British Gas guidance emphasises that the last number, which may appear in red, should not be included in your reading.

What does the A button do on a smart meter?

The A button is the primary navigation control on most UK smart meters. It cycles through different screens — from total import readings to rate-specific registers. On meters with a green A and white B layout, the green A button accesses deeper menus, while the white B button serves as a wake or back function.

How to Read a Dial (Analog) Electric Meter

Dial meters are older but still found in many UK homes. They have four or five small dials arranged in a row, each with a pointer. The dials alternate direction: the first turns clockwise, the second anticlockwise, and so on.

How to read dials from left to right on an electric meter

Start with the leftmost dial and move to the right. Write down the number each pointer indicates. If the pointer is between two numbers, record the lower number. This is the most important rule for dial meters.

What does it mean when the pointer is between two numbers?

When the pointer sits between two digits, always write down the smaller number. For example, if the pointer is between 3 and 4, record 3. The exception is when the pointer is exactly on a number. In that case, look at the dial to the right. If that next dial has passed 0, keep the number. If the next dial has not passed 0, use the lower number instead.

Which dials should I ignore on an analog meter?

Ignore any dial marked in red, any dial labelled 1/10, and any extra right-most fractional dial. These are used for testing or fractional readings and are not part of the consumption figure you submit. Citizens Advice advises reading only the first four dials from left to right and ignoring the large or red dials.

How to read a dial meter for kW demand

Some meters, particularly older commercial or US utility models, have a separate display that cycles to a code representing peak demand. In the UK this is less common for domestic meters. If your meter shows a reading labelled kW rather than kWh, that figure indicates current power draw, not total consumption. For billing purposes, you need the kWh figure.

How to Read Electric Meters from Specific Suppliers (British Gas, EDF, Octopus, Eon, SSE)

Each supplier provides slightly different instructions for their meters, but the underlying logic is the same. Below is a breakdown of what the major UK suppliers recommend.

How to read a British Gas electric meter

British Gas advises reading the five numbers from left to right on a standard digital meter and ignoring the last number if it appears in red. For smart meters, follow the A/B button process described above. British Gas provides an official guide on its website with images of the display.

How to read an Octopus electric meter (including smart meter)

Octopus Energy offers detailed guidance for many meter variants. For keypad meters, press 9 and wait for IMP KWH or IMP R01 / IMP R02. For A/B button meters, press A to cycle to TOTAL ACT IMPORT. Octopus also covers three-button meters and orange/blue button models on their blog.

How to read an EDF electric meter with dials

EDF Energy provides a dedicated FAQ page for dial meters. Their key instruction: if the pointer is between two numbers, write down the lower number — except when it sits exactly on a number. EDF emphasises ignoring leading zeroes and decimals for digital displays as well.

How to read an Eon electric meter

Eon uses standard digital and smart meters. The same rules apply: read the kWh figure from left to right, ignore red digits and decimals. For smart displays, press the A button to cycle through screens. Eon recommends submitting readings monthly.

How to read an SSE electricity meter

SSE follows the same conventions as other major suppliers. Digital meters are read left to right ignoring the red digit. Smart meters use the A button to navigate to the total import reading. If you have an older SSE dial meter, the standard pointer rules apply.

How to submit a meter reading to your supplier

Once you have the correct whole-number kWh figure, submit it through your supplier’s website, mobile app, or automated phone line. Most suppliers allow you to submit a reading at any time. Doing so within two days of your billing date ensures the reading is used for that period. Check your supplier’s specific submission process if you are unsure.

How to Understand and Calculate Your Electric Meter Reading

Knowing what the numbers mean is just as important as knowing how to read them. This section explains the units, how to estimate your usage, and what labels like IMP and R01 stand for.

What are the units on an electric meter?

The primary unit is the kilowatt-hour (kWh), which measures energy consumption. One kWh equals using 1,000 watts of power for one hour. Your meter records total kWh consumed since it was installed or last reset. Some meters also display kW (kilowatts), which is a measure of instantaneous power demand, not cumulative usage.

How to calculate your electricity bill from a meter reading

You do not need to calculate your bill manually unless you want to check your supplier’s estimate. The formula is simple: subtract your previous reading from your current reading to get the kWh used in that period. Multiply that number by your unit rate (in pence per kWh) and add any standing charge.

Example: if your previous reading was 14821 and your current reading is 15240, you have used 419 kWh. At a rate of 28p per kWh, that comes to £117.32 plus the standing charge. For two-rate tariffs, calculate each rate separately using the R01 and R02 readings. If you’re curious about conversions, you can find out how many grams in an ounce. how many grams in an ounce

What do the numbers on my electric meter mean?

Common labels you may see include: kWh (consumption), IMP (imported electricity), TOTAL ACT IMPORT (total imported electricity), R01 / Rate 01 (one tariff register), and R02 / Rate 02 (second tariff register). If your supplier asks for a single number, submit the total active import or the single kWh figure shown.

How to read an electric meter for peak demand (kW)

Some meters, particularly those used in commercial settings or with time-of-use tariffs, display a peak demand figure in kW. This is not the same as your consumption reading. To find it, look for a screen labelled kW or wait for the display to cycle to code 10 on certain LCD models. This figure is used for capacity charges, not for standard kWh billing.

How Have Electric Meters Changed Over Time?

The type of meter you have depends largely on when it was installed. Knowing the history helps explain why different reading methods exist.

1. Pre-1980s: Electromechanical dial meters were widespread. These required reading the physical dial pointers.
2. 1980s–2000s: Introduction of digital LCD meters with a single row of numbers. These simplified reading but still required manual submission.
3. 2010s: The smart meter rollout began in the UK, allowing automatic transmission of readings.
4. 2020s: Smart meters became standard for new installations, but legacy dial and digital meters remain in many homes.

What About the Confusing Parts of Reading a Meter?

Some situations are less straightforward than others. The table below clarifies what is well established and what remains uncertain or variable.

Why Does Accurate Meter Reading Matter?

Submitting accurate readings has direct financial and practical benefits. Estimated bills can be up to 20% higher than actual usage, according to consumer data. By providing regular readings, you avoid overpaying and only pay for what you have used.

Tracking your consumption also helps identify high-usage appliances and patterns. A sudden spike may indicate a fault or an appliance left running. When switching suppliers, an accurate final reading prevents disputes and ensures the closing bill is correct.

Smart meters automate this process most of the time, but signal failures can interrupt the connection. Checking the display every few months provides a useful backup.

What Do the Suppliers Say?

The following quotes come from official supplier guidance and consumer advice organisations. Each reflects the specific instructions for their meter types.

“Press and hold the green A button for at least 2 seconds. Press A again and again to cycle through the displays.”

— Octopus Energy

“Write down the five numbers shown from left to right. Ignore the last number(s) which may be shown in red.”

— British Gas

“If the pointer is between two numbers, write down the lower number – except when it sits exactly on a number.”

— EDF Energy

“Read the first 4 dials from left to right – ignore the large dials or red dials.”

— Citizens Advice

What Should You Do Now?

Once you have your reading, submit it online or through your supplier’s app. Compare it to your previous reading to track how much energy you have used. Setting a monthly calendar reminder to check the meter keeps your bills accurate. If you have an older dial or digital meter, you may also want to check whether a free smart meter upgrade is available from your supplier.

For more details on the submission process, see our guide on How to Submit a Meter Reading. To better understand your energy costs, explore Understanding Your Electricity Bill and Compare Energy Tariffs.

Frequently Asked Questions