What the numbers on your electric meter actually show
Your electric meter measures how much electricity you use in kilowatt-hours (kWh). The display shows a row of numbers that count upward every time you run an appliance — the more you use, the higher the numbers climb. Your utility company reads this number once a month to calculate your bill. The meter itself never resets to zero; it only goes forward, like the odometer in a car.
Most residential meters have five or six black digits on a white background, sometimes with a red digit at the end. You read them left to right, just like a number on a page. If your meter has a dial face instead of digital numbers, the process is slightly different but follows the same principle — you're still reading how many kilowatt-hours have been used since the meter was installed.
Key Takeaways
- Read the five or six black digits from left to right, ignoring any red digit at the end, to find your current meter reading.
- Write down the number shown on your meter and subtract your previous month's reading to find how many kilowatt-hours you used that month.
- The meter counts continuously upward and never resets, so a lower reading than last month means the meter rolled over past 100,000 or 999,999.
- If your meter has rotating dials instead of digital numbers, read each dial from left to right, moving to the next dial when one completes a full rotation.
- Your utility company uses the monthly difference in readings to calculate your bill, so knowing how to read your meter helps you spot billing errors.
Reading a digital meter with numbers
Stand in front of your meter and locate the display window. You will see a row of black digits — typically five or six numbers. Read them from left to right, exactly as you would read any number. If the meter shows 00847, that means 847 kilowatt-hours have been used. If it shows 12,456, that is 12,456 kilowatt-hours. Some meters display a comma between digits to make the number easier to read; some do not.
Ignore any red digit or decimal point at the end of the display. That red digit measures partial kilowatt-hours and does not affect your bill — your utility company only counts the black digits. Write down the black digits exactly as they appear, left to right, and that is your meter reading for the month.
To find how much electricity you used during a billing period, subtract your previous month's reading from your current reading. If last month you read 12,456 and this month you read 12,687, you used 231 kilowatt-hours (12,687 minus 12,456). This is the number your utility company uses to calculate what you owe.
What to do if the reading seems to roll backward
If your current reading is lower than last month's reading, your meter has rolled over. Meters with five digits can only display numbers from 00000 to 99999. Once they reach 99999, the next kilowatt-hour takes them to 00000 and the cycle starts again. If your last reading was 99,847 and this month it shows 00156, you did not use negative electricity — the meter rolled over and you used 309 kilowatt-hours (from 99,847 to 99,999 is 152 kWh, then 00000 to 00156 is 156 kWh, totaling 308 kWh).
This rollover is rare in most homes because it would require using nearly 100,000 kilowatt-hours in a single month — far more than a typical household consumes. If you see a rollover, your utility company's billing system accounts for it automatically. You do not need to do any special calculation yourself; straightforward report the number you see on the meter.
Reading a dial meter instead of a digital display
Older meters use rotating dials instead of digital numbers. Each dial looks like a clock face with numbers 0 through 9 around the edge and a pointer in the middle. You read the dials from left to right, writing down the number the pointer has just passed. This is different from reading a clock — you always read the number the pointer has passed, not the number it is pointing at.
If the pointer is between 3 and 4, you write down 3. If it is exactly on a number, look at the dial to its right. If that dial's pointer has not yet reached 0, write down the number the left pointer has just passed. If the right dial's pointer has passed 0, write down the number the left pointer is pointing at. This rule prevents you from reading a number the meter has not quite reached yet.
Once you have read all five or six dials left to right, you have your meter reading. Subtract your previous month's reading the same way you would with a digital meter. The math is identical — only the way you extract the number from the meter face is different.
Why your utility company's reading might differ from yours
If you read your meter and get a different number than what appears on your bill, several things could explain it. Your utility company may have read the meter on a different day than you did, so a few days of usage could account for the difference. They may also have estimated your reading if they could not access the meter — this happens during bad weather, when a gate is locked, or when a dog blocks the path to the meter box.
Check your bill for a note that says "estimated" next to the reading. If it does, your utility company made an educated guess based on your past usage rather than reading the actual meter. This is normal and happens to most customers occasionally. The next month's reading will correct any overestimate or underestimate from the previous month.
Using your meter reading to track your own usage
Reading your meter yourself each month gives you a real-time picture of your electricity consumption. Write down the reading on the same day each month — the first of the month works well — and keep a straightforward list. Over time, you will see which months use more electricity (usually summer for air conditioning or winter for heating) and which use less.
If you notice a sudden spike in usage with no explanation, something in your home may be consuming more power than usual. A failing refrigerator, a water heater set too high, or a new appliance running constantly can all show up as a jump in your monthly reading. Tracking your meter helps you catch these problems before they show up as a shock on your bill.
Frequently Asked Questions
What is a kilowatt-hour and why does it matter?
A kilowatt-hour is the amount of electricity one 1,000-watt appliance uses in one hour. Your meter counts these units, and your utility company charges you a set price per kilowatt-hour. Understanding this unit helps you see why running a space heater for eight hours costs more than running a light bulb for the same time.
Can I read my meter wrong and cause a billing error?
Your reading does not affect your bill — your utility company reads the meter themselves and uses their reading to calculate what you owe. Reading your own meter is only useful for tracking your usage and spotting errors on your bill. If you think your bill is wrong, compare your own reading to theirs and contact them with the discrepancy.
Why does my meter have a dial that spins faster than the others?
Some meters have a small dial that rotates continuously to show real-time usage. This dial is for reference only and does not affect your bill. Your utility company only counts the five or six main dials or digital numbers. The spinning dial straightforward gives you a visual sense of whether you are using electricity at that moment.
What if I cannot access my meter to read it?
If your meter is locked behind a gate, buried in a box, or otherwise inaccessible, contact your utility company and let them know. They have tools and authority to read meters in difficult locations. Do not attempt to cut locks or move obstacles yourself — the meter belongs to the utility company and they are responsible for reading it.
Does reading my meter more often help lower my bill?
Reading your meter as often as you like does not change your bill — you are charged based on how much electricity you actually use, not how often you check. However, reading it regularly helps you understand your usage patterns and spot problems early, which can help you use less electricity over time.