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Free Tool
Microwave Oven Electricity Cost Calculator
See exactly what your microwave oven adds to the bill — plus what the same minutes would cost on LPG. Pick your oven type, household uses and local rates for an instant India-first estimate.
~₹590/yr
avg yearly microwave oven electricity cost, Indian home
1. Your microwave oven
Pick the type closest to your oven. Check the rating plate inside the door or the spec sheet for litres and watts.
2. Who uses it
Add each person who uses the microwave oven. Frequency and heat time can differ per person.
3. Your energy rates
India-first defaults: ₹6.5 per kWh and ₹950 per 14.2 kg cylinder (~₹67/kg) for LPG. Edit both to match your bill or refill rate.
Typical: ₹6.5/kWh
Typical: ₹950 / cylinder (14.2 kg) · ~₹67/kg
Why your microwave oven's running cost matters
The wattage on the box is the peak draw — what the magnetron (and heater, on grill/convection models) can pull when fully loaded. The number that actually hits your bill is the average energy per use, which depends on the oven type, how long you run it and how many times your household uses it each week.
Three things decide the real monthly figure: the oven class (a solo 20 L at 1,000 W sips power for reheating, a convection 28 L at 1,500 W works harder when baking), how often your family uses it, and what it replaces — the same reheating on an LPG hob burns gas instead. This calculator adds all three together for every member of your home and prices it at your editable rates.
Defaults are India-first: ₹6.5 per kWh for electricity and ₹950 per 14.2 kg cylinder for LPG (~₹67/kg). Switch them any time to match your slab or refill bill. Microwaves shine at short reheats — a few minutes at full power costs only a rupee or two.
How It's Calculated
How your estimate is worked out
For each member we estimate one use as (watts ÷ 1000) × (mins ÷ 60) kWh, multiply by uses per week and by 4.33 weeks to get the monthly figure. LPG is (mins ÷ 60) × 0.10 kg/h × uses on the same schedule. Both energy figures are priced at your editable rates and summed for the household total.
| Assumption | Value |
|---|---|
| Solo 20 L · energy / use | 1000 W × 15 min ≈ 0.25 kWh |
| Grill 25 L · energy / use | 1250 W × 15 min ≈ 0.31 kWh |
| Convection 28 L · energy / use | 1500 W × 15 min ≈ 0.38 kWh |
| LPG burner rate | 0.10 kg per hour |
| Weeks per month | 4.33 |
| Default tariffs | ₹6.5/kWh · ₹950/14.2 kg cylinder |
Estimates only — actual draw varies with load, power level, door-open time and thermostat cycling. See your electricity bill and LPG receipt for your exact tariffs.
Compare Microwave Oven Types
How does your microwave oven compare?
Monthly cost below assumes 7 uses/week, 15 minutes each, at ₹6.5/kWh. LPG column uses the same uses and times at ~₹67/kg (₹950/cylinder).
| Type | Capacity | Power | Monthly kWh | Monthly elec. | LPG equiv. |
|---|---|---|---|---|---|
| Solo 20 L · selected | 20 L | 1000 W | 7.58 | ₹49 | ₹51 |
| Grill 25 L | 25 L | 1250 W | 9.47 | ₹62 | ₹51 |
| Convection 28 L | 28 L | 1500 W | 11.4 | ₹74 | ₹51 |
Save Money
Cut the cost of microwaving
Skip preheat for reheating
Preheating only matters for convection baking. For reheating or defrosting, put the food straight in — an empty 5-minute run wastes ~10% per use.
Cover food with a lid
A microwave-safe lid traps steam so food heats faster and more evenly — shorter runs, lower bills, and a cleaner cavity.
Switch off at the socket
On standby a microwave oven can draw 2–4 W for the clock and display. Switch it off at the wall when not in use.
Use the right power level
Full power for boiling and reheating, medium for defrosting and gentle warming. Matching power to the job avoids overcooking and repeat runs.
Wipe the cavity weekly
Grease and splatters absorb microwaves before they reach food, making every use slightly longer. A damp wipe keeps efficiency — and service calls — down.
FAQ
Frequently asked questions
How much electricity does a microwave oven use per use?
A solo 20 L (1,000 W) uses ~0.25 kWh for 15 minutes, a grill 25 L (1,250 W) ~0.31 kWh and a convection 28 L (1,500 W) ~0.38 kWh. That's the magnetron (plus heater on grill/convection) for that duration.
How much does it cost to run a microwave oven in India?
At ₹6.5/kWh, a 15-minute use costs roughly ₹1.6 (solo 20 L), ₹2.0 (grill 25 L) or ₹2.4 (convection 28 L). A household reheating daily on a solo 20 L spends ~₹50 per month on electricity.
Is a microwave oven cheaper than LPG?
Roughly similar per hour. LPG at ~₹67/kg (₹950/14.2 kg) and 0.10 kg/h is ~₹6.7 per hour; a solo 20 L at ₹6.5/kWh is ~₹6.5 per hour. The microwave usually wins per dish because reheating takes minutes with no vessel preheating — and you avoid an extra burner.
Does a convection microwave cost a lot more to run?
Only when you bake. A 20–40 minute convection bake runs the heating element continuously, so one cake can use ~0.75–1 kWh (~₹5–₹7). Used mainly for reheating like a solo, a convection costs barely more day to day.
Does a bigger microwave oven use more electricity?
Yes, per minute — a 28 L convection draws ~1,500 W versus ~1,000 W for a 20 L solo. But usage pattern dominates: a big oven used for 10-minute reheats costs less than a small one run for long grilling sessions.
Do lower power levels save electricity?
Not really for the same heat delivered — lower levels cycle the magnetron on and off, so the same food heated through uses similar energy. Use lower power for even defrosting and gentle warming, not to save units.
Does preheating add a lot to the cost?
Only for convection baking, where a 5–10 minute preheat at ~1,500 W is ~0.13–0.25 kWh (~₹1–₹1.60). For reheating and defrosting, skip preheating entirely — it adds nothing but cost.
What capacity do I need for my family?
20 L solo suits 1–2 people for reheating. 25 L grill fits 3–4 with grilling needs. 28 L and above convection suits 4–6 and baking. Bigger means higher watts, so match capacity to actual use.
Do microwave ovens use electricity when off?
Most draw 2–4 W on standby for the clock/display if left plugged in — roughly ₹100–₹200 a year if never switched off. Use the wall switch after each use.
How do I find my microwave oven's actual wattage?
Check the rating plate inside the door or the spec sheet — it lists output watts (e.g. 700–900 W) and input draw (e.g. 1,000–1,500 W). Use the input figure for cost math; if it lists only amps, watts ≈ amps × 230 V.
Keep Reading
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