Lube calculator

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  • Please be sure to check the input unit (mm/m]. Mixing up units is the biggest cause of on-site accidents due to incorrect ready-mix concrete orders.
  • It is standard practice to fine-tune the quantity when ordering the last vehicle, taking into account the remaining volume of the pump truck pipeline (about 0.2 to 0.5 cubic meters].
  • If there is a significant difference in elevation of the foundation, it is safer to calculate based on the deepest point and apply a 5–10% markup.
  • To reduce ready-mix concrete costs when pouring walls, you must accurately input and deduct the area of ​​openings such as windows and doors.
  • One large ready-mix concrete truck holds 6 cubic meters and can pour approximately 1.5 pyeong based on a thickness of 200mm.

Cubic Meter Calculator, Complete Guide to Concrete Pouring Volume and Ready-Mix Concrete Quantity Calculation

We assist with precise quantity calculations by reflecting markup rates and customized calculations for each structure, such as slabs, foundations, and walls.

Concrete cubic meter (㎥] calculation formula

"Lube" is a field term for cubic meters (㎥], and it is basically calculated by multiplying the width, length, and height (thickness].

1. Basic Volume Calculation Formula
Volume (㎥] = {Width × Length × Thickness} / 1,000,000,000

This is a standard method for calculating volume by converting the millimeter units commonly used in the field into meters.

2. Customized calculation method by structure
- Slab: Total Area × Thickness - Strip Foundation: Width × Total Length × Height - Wall: (Length × Height × Thickness] - Subtracted Area

When pouring wall concrete, you must exclude the area of ​​openings such as doors or windows (deductible area] to reduce errors.

3. Calculation of Final Order Quantity (Markup Reflected]
Final Quantity = Net Volume × (1 + Markup Rate/100]

A surcharge (Loss] of usually 5–10% is added to account for formwork displacement or pump truck residue.


Detailed Guide to Calculator Input Items

Please enter accurate measurement values ​​according to the selected items for each structure.

  • 1. Slab / Mat Specifications

    Enter the floor width, length, and pouring thickness in mm or m units.

  • 2. Foundation / Wall Specifications

    Please enter the total length and height of the foundation, or the overall specifications and thickness of the wall.

  • 3. Deduction area

    Enter the dimensions of openings such as doors or windows to automatically exclude them from the quantity.

  • 4. Surcharge rate

    Usually, a 5~10% surcharge is added to account for formwork displacement or pump truck remaining volume.


Concrete Standard Specification Guide

These are the recommended specifications for general ready-mix concrete based on the construction area and required strength.

Applicable target Recommended strength (MPa] slump note
lean concrete 18MPa 이하 120 ~ 150 Leveling the floor before foundation
General slab 21 ~ 24MPa 120 ~ 150 Apartment, commercial floor
Structural foundations 24 ~ 27MPa 120 ~ 150 Mat foundation, load-bearing wall
Exposed concrete 27MPa 이상 150 이상 Pouring of retaining wall without finishing

Essential Checklist for Fail-Free Construction

This is a practical checklist to minimize on-site errors.

  • Caution regarding mixed units

    This is the most common mistake in the field. Please make sure to check that the selected unit and input value match.

  • Check floor level uniformity

    If there is a significant difference in elevation, calculate the average thickness or divide the calculation into sections to prevent shortages.

  • Weather-based surcharge adjustment

    On hot days, moisture evaporates quickly, so it is safer to set the surcharge rate 1 to 2 percent higher.

  • Considering the remaining amount of the pump truck

    Please adjust the quantity when placing the last vehicle order, taking into account the remaining amount inside the boom.


Frequently Asked Questions (FAQ]

  • Q. How many square meters can be poured with one truckload of ready-mix concrete (6 cubic meters]?
  • A. Based on a thickness of 200mm, approximately 1.5 pyeong can be poured per cubic meter, so one truck can cover about 9 pyeong (30㎡].
  • Q. How many bags of bagged concrete (ready-mix mortar] are needed per cubic meter?
  • A. Since one 40kg bag is about 0.02 cubic meters, you need about 50 bags to fill 1 cubic meter.
  • Q. How do I convert area (hebe] to cubic meters?
  • A. You just need to multiply the area (㎡] by the thickness (m]. Example: 100㎡ x 0.2m = 20 cubic meters.