Electricity bill calculator
Estimate a Philippine electricity bill from meter readings and charges.
Updated 2026-07-17 · Formula version appears with every result.
Preparing the calculator…
This should only take a moment. You can retry if it does not finish.
Data confidence
High
Evidence used
Uses your meter readings, billing period, and entered all-in rate.
What can vary
Taxes, adjustments, tiered charges, and utility-specific fees can change the final bill.
Planning use
Educational estimate only. Confirm the final design and quotation with qualified professionals.
How this estimate works
Calculations are versioned, reviewed, and reproducible. Inputs are validated and planning ranges are used instead of false precision.
Results support early decisions. Confirm utility rates, equipment specifications, site conditions, and professional requirements before committing money. Review the methodology and source policy before treating any estimate as decision-ready.
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Before using the calculator
What this calculator estimates
Estimate kWh use and an indicative Philippine electricity bill from meter readings, rate, fixed fees, and other charges.
Who it is for
Households checking a bill, building a consumption baseline, or preparing inputs for a solar estimate.
Inputs and methodology
Consumption equals current meter reading minus previous reading. The estimated energy charge multiplies consumption by the entered blended rate, then adds the entered fixed and other charges.
Required inputs
- Previous and current meter readings in kWh
- Actual blended electricity rate from the bill
- Fixed fees, other charges, and billing duration
Philippine planning assumptions
- The entered rate is representative of the billing period.
- Meter readings use the same unit and are entered in the correct order.
Worked example
A meter moving from 12,450 to 12,790 records 340 kWh. At an entered rate of ₱11.50/kWh plus ₱250 fixed fees, the simplified estimate is ₱4,160 before any additional entered charges.
How to interpret the result
Compare the estimate with the actual statement. A gap can come from rate components, taxes, adjustments, demand-related charges, reading dates, or incorrect meter inputs.
Use the result as a comparison baseline: change one assumption at a time, keep the original inputs, and ask installers to explain why their written estimate differs.
Common mistakes
- Using the advertised base rate instead of the actual blended bill rate
- Reversing previous and current meter readings
Related questions
Why can the estimate differ from the bill?
Real bills can include several rate components, taxes, adjustments, subsidies, minimum charges, or other items not represented by one blended input.
Can this estimate size solar?
Use the resulting kWh with several months of bill history. A single month is not a stable annual baseline.
Limitations and disclaimer
- The result is an educational planning estimate, not a quotation, site survey, electrical design, or engineering approval.
- Verify current rates, equipment, roof conditions, utility rules, and written installer assumptions before spending.
Last reviewed 2026-07-20