Compare an estimated statement with a catch-up read
The first electricity statement bills an estimated 160 kWh. The next actual reading brings total consumption for the two months to 400 kWh, leaving 240 kWh to bill on the second statement.
Open CalculatorInputs and calculation
| Tool input | Value |
|---|---|
| Currency | USD |
| Utility | Electricity (kWh) |
| Previous usage | 160 |
| Current usage | 240 |
| Previous flat rate (USD/unit) | 0.25 |
| Current flat rate (USD/unit) | 0.25 |
| Previous bill (USD) | 50 |
| Current bill (USD) | 70 |
Usage: (240 − 160) × 0.25 = 20. Rate: 240 × (0.25 − 0.25) = 0. Actual bill difference: 70 − 50 = 20. Residual: 20 − (20 + 0) = 0. All effects are in USD.
Tool result · USD 20.00
| Tool input | Value |
|---|---|
| Currency | USD |
| Utility | Electricity (kWh) |
| Previous usage | 200 |
| Current usage | 200 |
| Previous flat rate (USD/unit) | 0.25 |
| Current flat rate (USD/unit) | 0.25 |
| Previous bill (USD) | 60 |
| Current bill (USD) | 60 |
Usage: (200 − 200) × 0.25 = 0. Rate: 200 × (0.25 − 0.25) = 0. Actual bill difference: 60 − 60 = 0. Residual: 0 − (0 + 0) = 0. All effects are in USD.
Tool result · USD 0.00
What the comparison shows
An 80 kWh difference between bills need not be an 80 kWh change in behavior. The even split illustrates the effect of timing and is not a corrected reading.
Assumptions and limits
A catch-up is plausible only if the meter sequence and bill notes support it. The actual split across both months may be unknown.