Horizontal Mortar Quantity Calculator

width

length

thickness

Types of mortar

Unit weight

ton/㎥

Sack weight

Surcharge rate

Please check.

If the primer is not applied thoroughly, air bubbles (pinholes] or lifting may occur, so please apply it sufficiently.
You must strictly adhere to the standard water mixing ratio. If there is too much water, the surface weakens, causing powder to fly off or cracks to form.
Since the hardening speed is very fast, mixing and pouring must be carried out without interruption to complete a smooth floor.
If there is a significant difference in floor elevation, the calculation must be made to ensure a construction thickness of at least 5mm based on the highest point.
Strong ventilation immediately after pouring can cause cracks, so please allow it to naturally cure for at least 1 to 2 days before proceeding with subsequent processes.

Guide to Precise Calculation of Required Quantity and Bag Count for Self-Leveling Mortar

Calculate the required weight and number of bags based on the area and thickness to prevent accidents that interrupt continuous casting.

To calculate the exact quantity, we use a formula that considers the construction volume and the unit weight of each product.

Volume (㎥] = Width × Length × Thickness

Number of bags = {Total weight (Volume × Unit weight] × (1 + Markup rate / 100]} ÷ Weight per bag

It is safe to add a surcharge of usually 10 to 15 percent to account for floor irregularities or scrap losses.

For accurate calculations, please enter the actual measurement reference values below in mm or m units.

1. Installation Width & Length
Please enter the actual dimensions of the floor to be constructed in mm or m units.
2. Target construction thickness
A minimum of 5mm is recommended, but if the condition is poor, it is safer to calculate 10mm or more.
3. Type of mortar and bag weight
Most are 25kg packages, or the quantity varies depending on the unit weight.
4. Setting Surcharge Rates
If there is a lot of floor subsidence, please allow a margin of 10–15%, which is the standard for on-site practice.

You must select a unit weight that matches the product specifications to reduce calculation errors.

Types of mortar	Unit weight (ton/㎥]	Recommended thickness	Main uses
Standard type (self-leveling]	1.70	5 ~ 10mm	General apartment, commercial building floor foundation
High-strength type	1.80	10mm 이상	Places with heavy loads, such as parking lots and factories
Thin film type	1.60	2 ~ 5mm	Repair of existing flooring and thin finish

note.

General plastering mortar is heavier with a unit weight of 2.10 and requires a minimum application thickness of 20mm or more.

These are the key practical points for a perfectly level floor.

Setting the reference point (level]
Use a laser level to check the highest point of the floor and ensure the minimum thickness.
Primer treatment is essential
If the existing pores in the bottom are not filled, pinholes (bubbles] will occur.
2-person consecutive shot
Since the viewing time is short, you must work without interruption to prevent boundary lines from forming.
Using spike rollers
Immediately after pouring, use a roller to push the concrete to remove internal air bubbles and ensure precise flatness.

Q. How many bags fit per pyeong?
A. Based on a thickness of 5mm, approximately 1.1 to 1.2 bags are required per pyeong, so we recommend ordering 1.3 bags.

Q. When can I walk on it after installation?
A. Walking is possible 24 hours after room temperature, and flooring installation is recommended 2 to 3 days later.

Q. The floor has severe cracks; can I just pour it?
A. No, that is not possible. Large cracks must be filled with repair mortar first to prevent material leakage.