calculation of quantities for concrete

i just want to know how to calculate the quantities for concrete esp soil excavation and back fill and for steel too i mean the fastest possible way to do these?

Like 0 Replies 6

Replies

Welcome, guest

Join CrazyEngineers to reply, ask questions, and participate in conversations.

Sign up Log in

CrazyEngineers powered by Jatra Community Platform

  • Ramani Aswath
    Ramani Aswath

    @ramani-VR4O43 • Oct 18, 2016

    There are lots of on line calculators available for many of these calculations. Do a search for 'Concrete Calculator'.

    0
  • prahu mac
    prahu mac

    @prahu-NGsuBH • Oct 21, 2016

    i mean sir i want to know the procedure for doing this?

    0
  • Sumukh Madgaonkar
    Sumukh Madgaonkar

    @sumukh-T0cfqu • Oct 21, 2016

    prahumaci mean sir i want to know the procedure for doing this?

    Calculation of quantity is as good as calculating the volume of the structure.
    Be it concrete, soil, reinforcement of structural steel!

    0
  • Lokeshgaddam
    Lokeshgaddam

    @lokeshgaddam-gMfCvz • Nov 8, 2016

    For providing a raft foundation what activities are involved ?

    0
  • Sumukh Madgaonkar
    Sumukh Madgaonkar

    @sumukh-T0cfqu • Apr 10, 2023

    Excel Spreadsheets the best possible way.........

    0
  • Julia Rowe
    Julia Rowe

    @julia-rowe • Aug 17, 2026

    Honestly, when I need quick numbers on site, I stick to basic multiplication.

    Excavation
    Length × width × depth. If the sides are sloped, take the average width. Add a little extra for working space and soil bulking, usually 5–10%.

    Backfill
    Excavation volume minus the volume of concrete, footing, pipe, or whatever else is sitting in the hole. Then multiply by a compaction factor. I normally use 1.2 to 1.3 depending on the soil.

    Concrete
    Length × width × thickness. For footings or columns, section area × length is faster. Add about 5% for waste.

    Steel
    The quick formula I use is D²/162 × length = kg, where D is bar diameter in mm. For common sizes: 8mm = 0.395 kg/m, 10mm = 0.617, 12mm = 0.888, 16mm = 1.58, 20mm = 2.47, 25mm = 3.85. Multiply by the number of bars and add 5% wastage.

    For repetitive takeoffs, I still double-check my numbers with a concrete calculation tool like CalculationHub. It doesn't replace the formulas, but it catches mistakes and saves time.

    0