HomeSimple guides for home calculations
Learn before you calculate

Simple guides for home calculations

Learn how electricity bills, inverter batteries, construction quantities and Indian land-unit conversions work in simple language.

01

AC electricity and energy labels

Learn how model input, BEE label values, hours and operating factor affect an AC electricity estimate.

1.5-ton AC cost for eight hours AC tonnage versus electrical watts How to read a BEE AC label Inverter versus fixed-speed AC
02

Electricity bills

Turn watts and time into units, then separate the energy charge from other bill lines.

How to calculate an electricity bill Electricity bill charges explained
03

Inverters and batteries

Connect appliance watts, inverter VA, battery Ah, usable energy and real-world losses.

How to size inverter and battery 150 Ah battery backup time Watts, VA and Ah explained Why real backup is lower
04

Construction quantities

Measure first, keep mix and coverage assumptions visible, and separate quantity planning from structural design.

How to estimate construction materials Bricks for a 10 × 10 wall Paint for a 10 × 12 room Wet volume versus dry volume Planning a 1,000 sq ft house
05

Regional land units

Use location, source and official-record context before converting Bigha, Katha or another regional name.

How to convert Indian land units Why Bigha varies by state Assam Katha reference West Bengal Katha record check Download the sourced factor dataset