How Many Watts Does a TV Use? What Does All-Day Viewing Cost?
All on one page: how many watts each TV size (32/43/55/65") uses in both LED and OLED, what several hours a day costs per month (at real current-period rates), whether big vs small screens differ much, and how much the standby draw when you "turn it off" with the remote costs over a year.
Short answer: a modern LED TV uses about 30–180 watts depending on screen size (32" ~30–55W, 55" ~80–130W, 65" ~110–180W); OLED panels draw a little more on bright content. Watched 5 hours a day, that's only tens to low-hundreds of baht a month (a 43" ~50 THB, a 55" ~70 THB) — so a TV is not what makes a bill expensive; aircon and water heaters use many times more. The overlooked part is standby: after you switch off with the remote it still draws ~0.5–3 W all year = ~20–120 THB/year. Full method and tables below, or price your whole-home bill with the bill calculator.
① How many watts does a TV use (by size and LED/OLED)?
Bigger screens use more, and at the same size an OLED usually draws more than an LED on bright content. The table below gives typical wattage RANGES for TVs on the Thai market (check your model's No.5 label for its exact figure) plus the monthly cost at 5 viewing hours a day, priced at the real marginal rate incl. Ft and VAT.
| Screen size | Panel | Watts | THB/month (5 h/day)* |
|---|---|---|---|
| 32" | LED | 30–55 W | 21–39 ฿ |
| 43" | LED | 50–90 W | 35–63 ฿ |
| 55" | LED | 80–130 W | 56–91 ฿ |
| 65" | LED | 110–180 W | 77–127 ฿ |
| 55" | OLED | 90–160 W | 63–113 ฿ |
| 65" | OLED | 120–210 W | 84–148 ฿ |
*Estimate at 5 hours/day × 30 days, at the marginal rate of a 151–400-unit/month home (incl. current-period Ft + 7% VAT). Every figure is computed live from the official tariff, not a round number. Efficient sets (multi-star No.5 label) draw below this range; maximum brightness / HDR mode draws above it.
Takeaway ①: the whole household's TVs draw at the level of light bulbs, not aircon. If you're sizing up and worried about the bill — the real difference is tens of baht a month, not a deciding factor.
② Watching all day / X hours a day — what's the monthly cost?
A TV's cost is simply "hours × watts". Leaving it on all day as background noise multiplies the bill immediately. This table takes two popular sizes (a 43" ~70W and a 55" ~100W) and prices them at different daily hours.
| Hours/day | 43" (~70W) | 55" (~100W) |
|---|---|---|
| 2 h (evenings) | 20 ฿ | 28 ฿ |
| 5 h (typical) | 49 ฿ | 70 ฿ |
| 8 h | 79 ฿ | 113 ฿ |
| 12 h (on all day) | 118 ฿ | 169 ฿ |
Even a big screen left on all day (12 h) is only a hundred-and-something to two-hundred-something baht a month — against an aircon at 8 h that can reach a thousand baht a month. To compare 30 more appliances see the appliance electricity cost table, or how to cut the whole-home bill.
③ Do big and small TVs differ much in power use?
They do differ, but less than people fear: a 65" uses about 3–4× a 32", yet in money that's only tens of baht a month at normal use, because the base is already low. What actually moves the bill is "how many hours" and "brightness / picture mode", more than screen size itself.
The reason people feel "a big screen makes the bill jump" is usually that they bought a big screen and started "watching longer" and "running bright/HDR mode" at the same time — not the size alone. What actually cuts a TV's cost: lower the brightness from the factory default (sets ship far brighter than a home room needs), turn on the Eco / energy-saving picture mode, and disable always-on bright features when you're not watching. Buying new, compare the kWh/year figure on the No.5 label between models — see how to read the No.5 label and its 1–5 stars.
Standby power: does it still draw after the remote turns it off?
It does, but little: modern sets meeting low-standby norms draw about 0.3–0.5 W; a smart TV with "quick start" enabled, or an older set, can draw ~1–3 W. Over a year that's roughly 20–120 THB per set — small, but several TVs plus a set-top box and a soundbar all on standby together can add up to a few hundred baht a year. If you're away for days (e.g. travelling), unplug it or use a switched power strip to cut all standby at once — the same principle MEA / SafeSaveThai recommend for always-on devices.
About the author
Compiled by the CapSolar team, a solar EPC/PPA provider in Thailand. We maintain this household-electricity series because computing the real tariff structure every period is our day job — every baht figure here is computed live from the current official rates, while the wattage spans are typical market figures (use your model's No.5 label for the exact number). This page is decision information, not a solar pitch.
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