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Electricity meter usage log
Turn cumulative meter readings into interval use and daily averages.
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How this tool works
Interval kWh = current reading − previous reading for the same meter. Daily use = interval kWh ÷ elapsed days. A decreasing reading requires review.
Method version: 2026-09-19.2
Input format
No automatic currency conversion. CSV headers remain English; use decimal points and ISO dates (YYYY-MM-DD).
- Meter readings
date,meter,reading_kwh
Reproducible example
All prefilled business examples are fictional. Replace them with your own checked inputs.
Scroll horizontally to see all columns.| Date | Meter | Cumulative kWh | Interval kWh | kWh / day |
|---|---|---|---|---|
| 2026-08-01 | Main | 12000 | Baseline | Not comparable |
| 2026-09-01 | Main | 12220 | 220.000 | 7.097 |
| 2026-09-19 | Main | 12360 | 140.000 | 7.778 |
Limits and assumptions
A decreasing reading is a reset or data error, never negative consumption. First reading is a baseline. Intervals are normalized by elapsed days, not compared as equal-length months.
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Sources and specifications
RFC 4180 — CSV formatCite or embed this tool
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