Data entered in this calculator is saved only in this browser on this device. Use Print / PDF if you want to keep a permanent copy.
Set Electricity Rate
Add Appliance
hours
minutes
Appliances
0
No appliances added yet.
Click "+ Add to List" or load sample data.
Cost Summary
Monthly CostActive appliances only
₱0.00
Daily CostAverage per day
₱0.00
Monthly kWhTotal consumption
0.00 kWh
Daily kWhAvg per day
0.00 kWh
Effective LoadCombined watts
0 W
Annual Estimate×12 projection
₱0.00
Usage By Category
No data yet.

Frequently Asked Questions

1. What does this calculator do?

This calculator estimates how much electricity your home appliances use and how much they cost to run.

It helps you:

  • Understand your monthly electricity bill
  • Compare appliances (e.g., inverter vs non-inverter)
  • Identify which appliances consume the most power
2. How do I find my electricity rate (₱/kWh)?

Your electricity rate is the amount you pay per kilowatt-hour (kWh). Check your electric bill (best method) and look for "Rate per kWh", or compute: Total Amount ÷ Total kWh used.

You can also use our estimated rates in the calculator, which we update monthly.

3. What are watts (W)?

Watts measure the power an appliance uses. Higher watts = higher electricity consumption.

  • Electric fan: ~50–80W
  • Refrigerator: ~100–300W
  • Aircon: ~1,000–1,500W
4. How do I find my appliance's wattage?

You can find wattage in several places:

  • On the appliance label or sticker
  • In the manual or product specifications
  • Online (search your model + "wattage")

Look for "W" (watts) or "kW" (1 kW = 1,000W).

5. What is a Usage Factor (%)?

Usage Factor adjusts for how much an appliance actually runs.

  • 100% — always running at full power
  • 50% — running about half the time or at reduced power
  • 30% — low average usage

This helps estimate real electricity consumption, not just maximum power.

6. Why doesn't my appliance use full wattage all the time?

Most appliances don't run at full power continuously. For example:

  • Aircon turns on/off or slows down
  • Refrigerator cycles throughout the day
  • Fans run at different speeds

That's why using wattage alone can overestimate your electricity cost.

7. What's the difference between inverter and non-inverter appliances?

Non-inverter: runs at full power then turns OFF, repeating an ON/OFF cycle — uses more electricity.

Inverter: adjusts power based on need and runs continuously at lower power — uses less electricity.

Inverter appliances can save 20–40% energy, especially during long usage periods.

8. If two appliances have the same wattage, will they cost the same?

Not necessarily. Even if both are rated at 1,300W, a non-inverter may frequently run at full power while an inverter runs at lower power most of the time — so inverter appliances usually cost less to operate.

9. Which appliances use the most electricity at home?

The biggest contributors are:

  • Air conditioners
  • Refrigerators and freezers
  • Cooking appliances (induction, oven)
  • Water heaters
  • Washing machines and dryers

Aircon alone can account for 40–60% of your total bill.

10. How can this calculator help me save money?

This tool helps you:

  • Identify high-cost appliances
  • Compare inverter vs non-inverter savings
  • Adjust usage (hours, settings)
  • Make smarter buying decisions

Even small changes can significantly reduce your electricity bill.

11. What appliances should I upgrade to inverter?

To maximize savings, prioritize appliances that run for long hours:

  • Air conditioners (biggest impact)
  • Refrigerators
  • Electric fans (DC/inverter fans)

These appliances offer the fastest return on investment.

12. How accurate are the results?

This calculator provides estimates, not exact bills. Actual usage depends on:

  • Temperature and environment
  • Appliance efficiency and condition
  • Usage habits
  • Electricity rates in your area

However, it gives a reliable approximation for planning and comparison.