Actual energy
—kWh
No reading yet
Dashboard
Compare real meter readings with an appliance-based estimate.
Estimated energy
—kWh
No appliances yet
Actual bill
—
Add a meter reading
Estimated bill
—
TNB domestic tariff · RM
Start your electricity ledger
Add appliances to build an estimate, then record a monthly meter reading to see the real bill next to it.
Actual vs estimated
Last 12 months
Usage timeline
Per appliance
Appliance breakdown
Estimated share for the selected month
Appliances
Power ratings and schedules used to estimate consumption.
Meter readings
Actual monthly consumption and the bill calculated from your tariff.
| Month | Actual | Estimate | Actual bill | Variance | Actions |
|---|
No readings yet
Enter the kWh from your meter for each month. The app calculates the actual bill and compares it with your appliance estimate.
Data & settings
Manage backups and keep a CSV copy of everything.
TNB bill
Actual and estimated bills use the fixed domestic TNB tariff in ringgit (RM).
CSV file
One CSV holds every appliance and reading.
Stored in this browser
LocalStorage keeps your ledger between visits. Download or link a CSV for a portable copy.
Nothing leaves this device. Keep a CSV backup to move data between browsers.
How the numbers work
- Appliance estimate —
watts ÷ 1000 × quantity × hours/day, counted only on its active days. - Hourly timeline — each appliance runs from its start hour for its daily hours, wrapping past midnight with fractional hours preserved.
- Bill — fixed domestic TNB rates in RM: energy, capacity and network, minus the EEI rebate, plus AFA, retail, KWTBB and SST. Actual uses meter kWh; estimated uses appliance kWh.
- Data — LocalStorage mirrors every change; CSV can be downloaded, imported, or linked for automatic saving in Chromium browsers.