Official sample statement walkthrough
This walkthrough transcribes the fields needed from the U.S. EPA's E3 Sample Energy Bill. It is an official sample statement, not a customer bill or a statement issued to Practical Calculator Guide. The dated sample shows one charge structure for teaching purposes; it is not a current rate benchmark. Preserve the wording beside each value when applying the method to your own statement.
Scroll horizontally to see all columns.
| Statement line | Value printed in the sample | How the walkthrough treats it |
|---|---|---|
| Service period | Nov 3 to Dec 7, 2005; 34 days | Period attached to every statement-level kWh calculation |
| Electricity used | 557 kWh | Usable kWh input, with its period attached |
| Generation energy charge | 0.07900 x 557 kWh = $44.00 | Printed generation-rate candidate |
| Five variable delivery lines | Distribution 0.02377; transition 0.00862; transmission 0.00819; energy conservation 0.00250; renewable energy 0.00050 dollars per kWh. Printed line totals: $24.27 combined. | Include only when the intended rate should contain these labeled delivery components |
| Customer charge | $5.81 | Fixed charge; keep outside appliance usage cost |
| Total delivery services | $30.08 | $24.27 in variable line totals plus the $5.81 fixed customer charge |
| Account balance | $74.08 | Full-statement total, not one appliance's cost |
Step 1: keep 557 kWh attached to 34 days
Entering 557 kWh in the kWh calculator answers a question about the complete 34-day amount. It is not a daily value, and it should not receive an automatic 30-day projection. Choose the billing-period option so the result preserves that meaning.
Step 2: decide which rate matches the question
The printed 0.07900 generation rate gives 557 x 0.07900 = 44.003, which the sample displays as $44.00. If the question is limited to the generation energy charge, 0.07900 dollars per kWh is the direct candidate from this sample.
If the intended comparison includes all five variable delivery components, their printed rates add to 0.04358 dollars per kWh. Multiplying 557 by 0.04358 gives 24.27406, or $24.27 after final rounding. Adding the generation and variable delivery rates gives a calculated combined rate of 0.12258 dollars per kWh.
One-cent rounding lesson
557 x 0.12258 is $68.27706, which rounds to $68.28 when calculated once. The sample's separately rounded generation and delivery line totals add to $68.27. Keep full precision for your calculation, but expect a small difference when a statement rounds several lines before adding them.
Step 3: keep the fixed charge outside usage cost
The $5.81 customer charge does not change with the selected appliance's kWh in this sample. The printed delivery total is $30.08 because it combines that fixed charge with $24.27 in variable delivery line totals. Adding the $44.00 generation total produces the $74.08 account balance. Dividing $74.08 by 557 creates a blended statement figure of about $0.1330 per kWh, but that value includes the fixed customer charge and is not a printed rate. The sample does not show a separate tax line, so this walkthrough does not invent one.
The completed calculator inputs
- Energy input: 557 kWh.
- Period: billing period, specifically 34 days.
- Rate option A: 0.07900 dollars per kWh for the generation charge only.
- Rate option B: calculated 0.12258 dollars per kWh for generation plus five variable delivery rates.
- Excluded from appliance usage cost: the $5.81 fixed customer charge.
Only add rates that apply to the same kWh. Tier rates, peak and off-peak prices, or alternative supplier offers are not simultaneous charges on every unit. The six rates in this sample can be combined because each is applied to the same 557 kWh; that does not make adding every rate on another bill valid.
With option A, the calculator should return about $44.00. With option B, it should return about $68.28 before statement-line rounding. The difference is not a calculation error; it is the consequence of choosing a rate with a different scope.
Use the same sorting method on another statement
- Mark the billing dates and total kWh before copying any price.
- Keep each printed per-kWh rate beside the charge and period it applies to.
- Separate variable charges from fixed fees, credits, taxes, and adjustments.
- Label a divided total as blended; do not present it as a printed utility rate.
- Choose the calculator period and note which charges the selected rate includes.
Continue only when a separate guide is needed
Use the kWh to Cost Calculator when the kWh, period, and included rate charges are clear. If tiering or time-of-use pricing makes the rate unclear, use the rate guide. When the question is why the full amount due differs from an appliance estimate, keep every sorted line and continue with the bill-difference guide.