Advanced estimate

Step 2 of 2 · Materials

Measure concrete, steel and formwork together

Enter the column, beam or slab dimensions, then add the approved mix and reinforcement details. Concrete, steel and shuttering stay in one result. Your saved measurements and defaults are already in place; change anything that is different on this job.

What does M25 mean?
M25 concrete grade

M25 states characteristic compressive strength at 28 days; it is not one fixed cement:sand:aggregate ratio. Enter the approved per-m³ design-mix quantities, or price the measured ready-mix volume.

CPWD concrete specification

Enter only reinforcement and concrete information supplied by the project engineer. This calculator measures quantities; it does not design structural members.

Measurements

Measurements

Column

These values stay read-only on the material page.

Change measurements or openings
Column height
9.84 ft
Column width
11.8 in
Column depth
11.8 in
Number of columns
1

Approved mix quantities

Copy these three values from the approved mix design or supplier schedule.

kg/m³
m³/m³
m³/m³

Using saved defaults

Standard sizes, ratios, wastage and rates are kept in one place instead of repeated on every item.

50 kg cement bag5% concrete wastage3% rebar wastage
See the arithmetic behind this estimate

The method, with an example

Formula

The member dimensions give concrete volume and form-contact area. The chosen mix gives the concrete constituents; the supplied bars or bar-bending schedule give the steel weight.

Worked example

A column uses height × width × depth for concrete and its four side faces for shuttering; supplied bar lengths determine steel weight.

What this result assumes

  • Member dimensions, concrete mix and reinforcement details come from approved project information.
  • Column shuttering includes four sides, beam shuttering two sides and soffit, and slab shuttering the soffit.

What it does not cover

  • This workflow calculates quantities only. It does not size members, design concrete, select reinforcement, or verify structural safety.

Questions that come up on site

Does the calculator decide how much rebar is safe?

No. Enter bars or a bar-bending schedule supplied for the project; the calculator only converts that information into weight and purchase quantity.

What will the result include?

Cement, sand, aggregate, reinforcement steel, shuttering sheets and their related labour appear together in the BOQ.