Construction calculators
Calculators show their formulas and assumptions, and are checked by a civil engineer before they are released. They run in your browser, and the numbers you enter are never sent to us.
Calculator
Cement, sand and aggregate calculator
Estimate cement bags, sand and aggregate for a nominal-mix concrete slab, footing or beam from its size and mix grade.
Calculator
Brick and mortar quantity calculator
Estimate the number of bricks and the cement and sand for mortar for a wall, from its length, height and thickness.
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Steel bar weight calculator
Find the weight of reinforcement bars by diameter, length and number of bars, using the standard D squared over 162 formula.
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Plot area converter
Convert land area between square feet, square yards (gaj), square metres, cent, guntha, ground, marla, kanal, acre and hectare.
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Water tank capacity calculator
Estimate the daily water need of a house from the number of people, and the smallest standard tank that holds one day of it.
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Septic tank size calculator
Look up the septic tank size for toilet waste from the number of users and the cleaning interval, using the dimensions in IS 2470 (Part 1).