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TCalculator.

Cubic Metre Calculator

This free cubic metre calculator gives you an answer in a couple of seconds, and shows the full working underneath so you can check it rather than take it on trust. Change any value and the result updates immediately. Nothing is stored, nothing is sent anywhere, and there is no sign-up.

Enter your values

Concrete required

2.64 m³

Volume before waste
2.4 m³
Approx. weight
6.34 tonnes
20 kg bags (if mixing on site)
265

How this is calculated

  1. 1

    Convert depth to metres

    d = mm ÷ 1000

    d = 100 ÷ 1000

    = 0.1 m

  2. 2

    Multiply the three dimensions

    volume = length × width × depth

    volume = 6 × 4 × 0.1

    = 2.4 m³

  3. 3

    Add the waste allowance

    total = volume × (1 + waste%)

    total = 2.4 × 1.1

    = 2.64 m³

  • Concrete is ordered in 0.2 m³ increments. Round up — a short load costs far more than a little spare.

How to use this cubic metre calculator

  1. Fill in your values. Every field starts with a sensible default, so you can change one number at a time and watch what it does to the result.
  2. Read the result. The headline figure sits in the pink box, with supporting numbers listed below it.
  3. Check the working. The breakdown shows each formula and the same formula with your numbers substituted in, so you can follow the method or reproduce it by hand.