Use this page to check video doorbell camera electricity consumption for your own video doorbell camera: enter your wattage, hours of use per day and electricity rate, and press Calculate. You see your daily, monthly and yearly cost plus your yearly kWh consumption. Those same results also cover video doorbell camera power consumption.
Does a doorbell that watches your porch all day push up your utility bill? Video doorbell camera electricity consumption is small: a wired unit drawing 4.6 watts around the clock uses 0.1104 kWh per day, which is about 57 cents a month at $0.172 per kWh. Below you will see how that figure is built, what pushes it higher, and how wired and battery security hardware compare, so you can price your own setup in minutes.
A doorbell with a lens never fully switches off. Even when nobody is on the porch, the doorbell keeps its Wi-Fi radio awake, watches for motion with motion detection, and holds a live connection to the app so you can open a stream instantly. That standby behaviour is why electricity usage for a doorbell is steady instead of spiky, and why it is better described in watts than in "uses per day."
The draw rises in short bursts when something happens: a visitor triggers motion detection, the camera starts recording, infrared night vision switches on after dark (night vision is usually the biggest single add-on), and the video uploads over Wi-Fi. Because these events are brief, they add far less to the daily total than the constant standby load does.
The simplest starting point is the watt rating printed in the user manual or on the label of the doorbell itself. Treat it as a ceiling, since the average wattage over a full day is usually lower than the peak the transformer must supply. For a wired doorbell that streams little, an average wattage of about 3 to 6 watts is a realistic planning range, while a unit with constant live view and heavy night use sits higher.
A video doorbell camera energy figure is normally lower than that of a typical security camera, because security cameras that run continuous recording with local storage or cloud uploads draw more than a doorbell that only records on motion. Wired cameras with a fixed power adapter also run all day, so a house with three of them can easily use several times what one doorbell does. Price each security camera on its own watt rating. If you are budgeting for a whole home security setup, add each device's own wattage rather than assuming the doorbell is representative.
Any energy usage calculator for a doorbell does the same three steps: convert watts to kilowatts, multiply by the hours the device is on, then multiply the resulting kilowatt-hours by your price per kWh. A doorbell energy calculator only needs three inputs, which makes the result easy to check by hand.
$$\text{kWh per day} = \frac{\text{watts} \times \text{hours per day}}{1000}$$ $$\text{Cost} = \text{kWh} \times \text{electricity rate}$$Take a wired doorbell that averages 4.6 watts for 24 hours a day at a rate of $0.172 per kWh. That is \(4.6 \times 24 \div 1000 = 0.1104\) kWh per day. Multiply by 30 for the month and by 365 for the year to get the figures below.
| Period | kWh used | Cost ($) |
|---|---|---|
| Per hour | 0.0046 | $0.0008 |
| Per day | 0.1104 | $0.0190 |
| Per month (30 days) | 3.312 | $0.5697 |
| Per year (365 days) | 40.296 | $6.93 |
Seven dollars a year for an always-on front-door camera is the kind of number worth confirming before you worry about it, and it is the reason most households never notice a doorbell on their bill.
The only input that changes from home to home is your energy rate, the price you pay for each kilowatt-hour. The national average is a reasonable placeholder, but your supplier's bill lists the exact figure, and electricity rates vary widely between regions and between peak and off-peak tariffs. Use the all-in rate (supply plus delivery) so the monthly cost matches what you actually pay.
Report the result three ways so it is easy to compare against other household devices: daily energy use in kWh, the monthly cost for budgeting, and the yearly cost for comparing against the price of an upgrade.
A wired doorbell takes power from your existing bell wiring and a low-voltage transformer, so it has no battery to maintain. A battery doorbell stores energy in a pack and spends most of its time asleep, waking only on motion or a button press. Both end up cheap to run, but the cost is expressed differently.
Ring sells wired doorbells such as the Ring Wired Doorbell 2K and the Wired Doorbell 4K Pro, and Ring's wired line is meant for doors with existing wiring and nonstop power. Because the supply is always connected, a wired unit does not have to ration its Wi-Fi radio or its camera, which is why its draw is steady across the day. Ring also lists a Wired Doorbell 2K Plus for buyers who want a larger field of view; check each Ring spec sheet for its supply voltage rather than assuming a number. For the calculator, a wired unit like these normally falls inside the 3 to 6 watt planning range above, so enter its measured watts and 24 hours per day.
Battery-powered models draw less from the wall because they only top up the pack when you plug in a charger. The trade-off is charging losses: a lithium pack returns less energy than it receives, and a cold porch reduces capacity. A Ring Battery Doorbell 2K, a Ring Peephole Cam, or Battery Doorbell 4K Pro with a quick-release pack, or a solar charger from Ring, shifts the cost to occasional charging instead of constant draw.
Your neighbour's quote for a new low-voltage transformer comes with a question: is the old one big enough? To find out, you plug a watt meter between the wall outlet and the existing 16 V, 10 VA transformer and leave it alone for seven days, since a single glance at the display would catch only one moment of the doorbell's draw. You can also check how many watts does a hot towel cabinet use.
The meter's weekly total works out to an average of 5.3 watts. Your electricity bill lists an all-in rate of $0.1648 per kWh, and the doorbell is powered all 24 hours of the day, so those are the three values you enter into the calculator.
Two numbers drive the decision. First, the transformer label says 10 VA, which caps the supply at roughly 10 W of apparent power, and 5.3 W is about 53% of that, so the old unit has headroom and the quote for a replacement can be declined. Second, the $7.65 yearly figure is what a doorbell costs on the current tariff, which makes the doorbell's running cost a non-issue.
Before closing the page you rerun the calculation once with a single input changed: your supplier's summer peak rate of $0.2410 per kWh. The yearly cost rises to $11.19, an increase of $3.54, which still sits well below the cost of the transformer upgrade. The next step is simply to leave the meter on for another week in July, because the night vision runs longer in summer evenings, and confirm that the average stays under 6 W.
Power over ethernet sends both data and power down one network cable, which suits homes with spotty Wi-Fi. A PoE doorbell such as Ring's Wired Doorbell 4K Elite draws its power through the cable from a switch or injector, so you pay for it on the same meter as any other network gear. In a larger home security layout this also keeps the doorbell off the Wi-Fi, and the switch or injector's own overhead should be added to the watts you enter so the kWh and cost figures stay honest.
The energy picture is the same: the device still draws a few watts all day, so convert it with the same formula (watts × 24 ÷ 1,000 gives daily kWh) and multiply by your rate for the cost. If you run several PoE cameras, add up the budget your switch must supply, because a switch's total power is shared across every port.
On a doorbell, night vision and motion detection cost more than pixels, yet resolution is the setting people expect to matter most, and it does, but only modestly. A 1080p camera encodes less data than a 2K or 4K sensor, so the processor and Wi-Fi radio work a little less. Ring's 2K and 4K doorbells, such as the Battery Doorbell 2K Plus, Wired Doorbell 2K and Wired Doorbell 4K Pro, process more pixels per frame, and that extra processing shows up as a higher average draw than a 1080p model during recording.
The effect is limited because the doorbell records only for seconds per event. Stepping from 1080p to 4K on a doorbell that records 20 short clips a day changes the daily figure by hundredths of a kWh, not tenths. Dropping the video quality is therefore a very small saving, and you should only do it if bandwidth is the real problem.
Indoor security cameras usually sit on a wall adapter, record continuously, and keep a fixed light or infrared illuminator running, so their power consumption is higher than a doorbell's per device. A video doorbell mostly idles and records only when triggered, so it often lands below a camera running all day. Multiply per camera: a home with one doorbell and four indoor cameras is dominated by the four cameras. Also see fish tank electricity consumption.
The same per-device formula scales to a business with a camera network, where a business owner can add up every device: add each device's watts, then convert to kWh once, and size the system by watts instead of headline resolution.
Because the base load is small, settings matter less than device choice, but a few doorbell camera changes still trim the figure. Cutting energy consumption further is mostly about reducing the work the camera does after dark and during busy hours. Compare with toaster oven electricity consumption.
A single draw in watts hides how much your own habits and tariff matter, so compare three plausible profiles for the same 24-hour wired doorbell at $0.172 per kWh. The idle profile has the camera mostly asleep, the typical one matches the worked example above, and the heavy profile adds constant live view and long infrared sessions.
| Profile | Average watts | kWh per year | Cost per year |
|---|---|---|---|
| Idle | 2.8 | 24.53 | $4.22 |
| Typical | 4.6 | 40.30 | $6.93 |
| Heavy | 7.9 | 69.20 | $11.90 |
Even the heavy profile costs less than a single takeaway meal over twelve months, so the savings from tuning are small; the real value is security, such as deterring theft and, in some cases, lowering home insurance premiums.
Look more closely when your energy bill is unexpectedly high and a device is suspect. A doorbell drawing 17 to 19 watts, as one owner reported on a forum, would be well above the planning range here, and is worth checking against the label: put a plug-in watt meter on the supply, then compare the measured watts, kWh and yearly cost with what the calculator gives for your 3 to 6 watt estimate. A faulty transformer or a unit stuck in a high-power night mode is a more likely culprit than normal operation.