1 · The main meter bill

Copy the total from this month's DESCO / DPDC / NESCO / BPDB / Palli Bidyut bill.

Main bill total (৳)

Main meter total units (optional)

Common-area cost (lift, pump, lights — the part of the bill no sub-meter covers)

2 · Each flat's sub-meter usage

Type the flat name and either this month's units, or last + this month's readings.

Flat	Prev. reading	Current reading	Units

3 · Everyone's fair share

Flat	Units	Usage cost	Common share	Pays

Effective rate this month—

How it works: the effective rate = main bill total ÷ total sub-meter units. Each flat pays its own units × rate, plus its share of the common cost (the difference between the main bill and the usage cost — lift, water pump, staircase lights and line loss). Everything is calculated on your device; nothing is uploaded.