1. What is a Mortar Calculator for Slabs?

Definition: This calculator estimates the amount of mortar needed for slab bedding based on area, bedding depth, mortar ratio, and yield per bag.

Purpose: It helps construction professionals and DIYers determine how many bags of mortar are required for slab installation projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( M \) — Mortar volume (number of bags)
• \( A \) — Area of the slab (square feet)
• \( D \) — Bedding depth (inches, converted to feet in calculation)
• \( R \) — Mortar ratio (unitless)
• \( Y \) — Yield per bag (cubic feet per bag)

Explanation: The area is multiplied by depth (converted to feet) and ratio to get total volume, then divided by yield per bag to get number of bags needed.

3. Importance of Mortar Calculation

Details: Proper mortar estimation ensures proper slab support, prevents material waste, and helps with accurate project budgeting.

4. Using the Calculator

Tips: Enter the area in square feet, bedding depth (default 1.5 inches), mortar ratio (default 1.5), and yield per bag (default 0.6 ft³/bag). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the bedding depth?
A: This is the thickness of the mortar layer beneath the slab, typically 1-2 inches for most applications.

Q2: What does the mortar ratio represent?
A: The ratio accounts for mortar composition and workability. A typical ratio is 1.5 for standard mortar mixes.

Q3: How do I find the yield per bag?
A: Check the manufacturer's specifications on the mortar bag. Standard mortar yields about 0.6 cubic feet per 80 lb bag.

Q4: Does this include waste or overage?
A: No, consider adding 5-10% to the calculated amount for project contingencies and waste.

Q5: Can I use this for different types of slabs?
A: Yes, but adjust the bedding depth and ratio according to the specific requirements of your slab material.