How Much Electricity Do Your Appliances Use? Wattage & Cost Table, 30 Items
Real wattage ranges (not fake-precise numbers), realistic daily hours, and monthly costs computed live from the MEA/PEA tiers + the current Ft period — a data page, not a tips listicle.
Every appliance's cost comes from one formula: watts ÷ 1,000 × hours used = units (kWh), multiplied by your home's marginal rate — for a 201–400-unit/month household the next unit costs about 4.62 THB/unit (incl. the Sep–Dec 2026 Ft and VAT). The biggest bill-makers in a Thai home are the air conditioner (high watts × long hours) and the shower water heater (highest wattage in the house), while a fridge running 24 h actually uses only ~0.6–1.4 units/day because the compressor cycles. The table below covers 30 appliances, or enter your own watts in the calculator.
The 30-Appliance Electricity Cost Table
Monthly costs are priced at the marginal rate of a 201–400-unit/month home ≈ 4.62 THB/unit (base tier rate + Ft 0.1623, Sep–Dec 2026 period + 7% VAT). Use the calculator below to switch bands. Rows tagged "24-h avg" use the duty-cycle average draw — not nameplate watts × 24 h.
| Appliance | Wattage range | Hours/day (preset) | Units/month | Cost/month |
|---|---|---|---|---|
| Cooling / AC / fans | ||||
| Air conditioner 9,000 BTUNon-inverter input (BTU × 0.083–0.105); inverter units settle to ~40–60% of this once at setpointCalculate mine (incl. TOU mode) → | 750–950 W | 8 h | 180–228 | 832–1,054 THB |
| Air conditioner 12,000 BTUContinuous-compressor figure; real bills run lower as the compressor cyclesCalculate mine (incl. TOU mode) → | 1,000–1,300 W | 8 h | 240–312 | 1,110–1,442 THB |
| Air conditioner 18,000 BTUCalculate mine (incl. TOU mode) → | 1,500–1,900 W | 8 h | 360–456 | 1,664–2,108 THB |
| Air conditioner 24,000 BTUCalculate mine (incl. TOU mode) → | 2,000–2,600 W | 8 h | 480–624 | 2,219–2,885 THB |
| Floor / stand fan 16" | 45–75 W | 8 h | 11–18 | 50–83 THB |
| Evaporative air cooler | 100–200 W | 8 h | 24–48 | 111–222 THB |
| Kitchen | ||||
| Refrigerator 7–12 cu ft24-h avg24-h duty-cycle average (compressor cycles) ≈ 0.6–1.4 units/day — NOT nameplate watts × 24 hBy size (5–16 cu ft) → | 25–60 W | 24 h | 18–43 | 83–200 THB |
| Chest freezer24-h avg24-h duty-cycle average (compressor cycles)Chest freezer by size, per month → | 40–90 W | 24 h | 29–65 | 133–300 THB |
| Microwave ovenMicrowave cost per reheat → | 800–1,400 W | 0.3 h | 7.2–13 | 33–58 THB |
| Rice cooker 1–1.8 LCooking phase; keep-warm mode draws ~40–150 WRice cooker: cook vs keep-warm cost → | 500–800 W | 0.75 h | 11–18 | 52–83 THB |
| Electric kettleThermo pot: is all-day keep-warm costly? → | 1,500–2,200 W | 0.2 h | 9.0–13 | 42–61 THB |
| Induction cooktop (single)Induction hob watts + amps → | 1,200–2,100 W | 1 h | 36–63 | 166–291 THB |
| Air fryerAir fryer cost per cook → | 1,200–1,800 W | 0.4 h | 14–22 | 67–100 THB |
| Coffee maker | 800–1,500 W | 0.2 h | 4.8–9.0 | 22–42 THB |
| Hot–cold water dispenser24-h avg24-h average (heater/compressor cycle on–off) | 50–120 W | 24 h | 36–86 | 166–399 THB |
| Laundry / housework | ||||
| Top-load washing machineWasher watts + amps per cycle → | 350–600 W | 0.5 h | 5.3–9.0 | 24–42 THB |
| Front-load washing machineTop of range = hot-wash heater on; cold wash runs near the bottomWasher watts + amps per cycle → | 500–2,100 W | 0.5 h | 7.5–32 | 35–146 THB |
| Clothes dryer | 1,800–2,500 W | 0.5 h | 27–38 | 125–173 THB |
| Clothes ironIron watts + cost per session → | 1,000–2,200 W | 0.5 h | 15–33 | 69–153 THB |
| Vacuum cleaner | 600–1,600 W | 0.25 h | 4.5–12 | 21–55 THB |
| Home water pumpRuns only while water flows; hours/day = total actual pumping timePump watts + short-cycling fix → | 250–450 W | 2 h | 15–27 | 69–125 THB |
| Bathroom / personal | ||||
| Instant shower water heaterHighest wattage in a typical home; draws only while showeringCompare 3500/4500/6000W + meter/breaker → | 3,500–6,000 W | 0.5 h | 53–90 | 243–416 THB |
| Hair dryer | 1,000–2,200 W | 0.15 h | 4.5–9.9 | 21–46 THB |
| Electronics / office | ||||
| LED TV 43–55"TV watts + all-day cost → | 60–150 W | 6 h | 11–27 | 50–125 THB |
| Desktop PC (with monitor)Gaming rigs with discrete GPUs can hit 500+ W under loadDesktop vs laptop watts → | 150–400 W | 8 h | 36–96 | 166–444 THB |
| LaptopDesktop vs laptop watts → | 40–90 W | 8 h | 9.6–22 | 44–100 THB |
| WiFi router | 5–15 W | 24 h | 3.6–11 | 17–50 THB |
| Air purifier | 20–60 W | 12 h | 7.2–22 | 33–100 THB |
| Lighting / misc | ||||
| LED bulbs, whole home (~10) | 50–120 W | 6 h | 9.0–22 | 42–100 THB |
| Aquarium (pump + light)24-h avg | 20–80 W | 24 h | 14–58 | 67–266 THB |
Wattage ranges are typical spec ranges for models sold in Thailand; real draw varies by brand, size and efficiency label (EGAT Label No.5). Read your unit's exact watts from its nameplate.
How Many Watts Does a Refrigerator Use?
A household fridge actually draws only 20–80 watts on average, depending on size — the nameplate usually says 60–200 W, which is the compressor-running power, not the average, because the compressor cycles on and off all day. That works out to about 0.5–1.9 units/day, roughly 67–266 THB/month at the ≈4.62 THB/unit marginal rate — see each size from 5–16 cu ft below.
How many watts does a 6 cu ft (6 คิว) fridge use?
A 5–6 cu ft single-door fridge is nameplated at 60–90 W but actually averages 20–35 W as the compressor cycles — about 0.5–0.8 units/day ≈ 67–117 THB/month.
How many watts does a 7 cu ft (7 คิว) fridge use?
A 7 cu ft fridge (the 7–9 cu ft class, single- or two-door) is nameplated at 70–110 W and averages 25–45 W in real use — 0.6–1.1 units/day ≈ 83–150 THB/month.
How many watts does a 10 cu ft (10 คิว) fridge use?
A 10 cu ft fridge (the 10–12 cu ft two-door class) is nameplated at 90–150 W and averages 35–60 W in real use — 0.8–1.4 units/day ≈ 117–200 THB/month.
How many watts does a 16 cu ft (16 คิว) fridge use?
A large 16 cu ft fridge (the 14–16 cu ft class — big two-door, side-by-side or multi-door) is nameplated at 130–200 W and averages 45–80 W in real use — 1.1–1.9 units/day ≈ 150–266 THB/month.
| Fridge size | Avg watts (24 h) | Units/month | Cost/month |
|---|---|---|---|
| 5–6 cu ft (single door) | 20–35 W | 14–25 | 67–117 THB |
| 7–9 cu ft (1–2 door) | 25–45 W | 18–32 | 83–150 THB |
| 10–12 cu ft (two-door) | 35–60 W | 25–43 | 117–200 THB |
| 14–16 cu ft (side-by-side / multi-door) | 45–80 W | 32–58 | 150–266 THB |
How much does a fridge cost to run per month?
A typical household fridge costs about 67–266 THB per month, depending on size — roughly 67–117 THB/month for a 5–6 cu ft, 117–200 THB/month for a 10–12 cu ft and 150–266 THB/month for a large 14–16 cu ft. Computed from the 24-h average watts in the table above at the ≈4.62 THB/unit marginal rate (Sep–Dec 2026 Ft and VAT included).
How many baht of electricity does a fridge use per month?
Take it in two steps. A fridge uses about 14–58 units per month; multiply that by your household's marginal rate. At ≈4.62 THB/unit (a 201–400 unit/month home) that is about 67–266 THB/month. A home under 150 units/month pays a lower rate, so its fridge costs less. Units per month by size are the middle column of the table above.
How many baht of electricity does a fridge use per day?
About 2.2–8.9 THB a day, or 0.5–1.9 units/day: roughly 2.2–3.9 THB/day for a small 5–6 cu ft and 5–8.9 THB/day for a large 14–16 cu ft. These use the 24-h average draw, not the nameplate watts × 24 h — the arithmetic that makes fridge running costs look several times higher than they are.
The average-watt ranges above are consistent with the main table's "Refrigerator 7–12 cu ft" row (25–60 W 24-h average). New inverter Label-No.5 units sit at the low end; old units, worn door seals or a packed, frequently-opened fridge sit high. Read your model's exact watts from its nameplate and drop them into the calculator.
Calculator: Watts × Hours = Cost
Pick an appliance to prefill its midpoint, or enter the watts from your unit's nameplate, then choose your household's monthly-usage band for the right marginal rate.
Calculator: Watts × Hours = Cost
Pick an appliance to prefill its midpoint, or enter the watts from your unit's nameplate, then choose your household's monthly-usage band for the right marginal rate.
Note: the marginal rate is used because each appliance adds units ON TOP of your existing bill — it is not the bill-wide average. Compute a full tiered bill at the bill calculator; TOU-meter homes pay time-dependent rates instead — see the TOU rate schedule.
How This Table Is Computed (Methodology)
Formula: units/month = watts ÷ 1,000 × hours/day × 30 days, then × the marginal rate ≈ 4.62 THB/unit (201–400-unit base tier + Ft 0.1623 + 7% VAT). Every figure is drawn from the official tariff tables — no re-typed constants.
Wattage ranges: typical spec ranges for Thai-market models (nameplate / EGAT Label No.5). They are deliberately ranges, not single numbers — quoting an exact watt without knowing your model is false precision. That same label also carries a star count — see what the No.5 label's 1–5 stars mean before comparing models.
Duty-cycled appliances (fridge, freezer, dispenser, aquarium): priced on the 24-h average draw, because the compressor runs intermittently — multiplying full nameplate watts by 24 h (as most listicles do) overstates a fridge's cost 3–4×.
Air conditioners: non-inverter input ≈ BTU × 0.083–0.105; inverter units settle to ~40–60% of rated once at setpoint. Table figures are the continuous-run upper bound — the full method is on the aircon cost page.
Why marginal, not average: the residential tariff is tiered, so each appliance's units are billed at the highest tier your home reaches — not at the bill-wide average. A 201–400-unit home really pays ≈ 4.62 THB for each extra unit; full reasoning on the why-is-my-bill-high page.
About This Data
Compiled by the CapSolar team, a commercial solar provider in Thailand that maintains this site's per-period database of MEA/PEA tariffs and ERC Ft rates. Every baht figure on this page is computed live from that same database — none is hand-typed.
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