1. What is a Mortar Mix Calculator for Paving Slabs?

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

Purpose: It helps landscapers and DIYers determine how many bags of mortar mix are required for laying paving slabs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( M \) — Mortar volume (number of bags)
• \( A \) — Area to be paved (square feet)
• \( D \) — Bedding depth (inches, converted to feet in calculation)
• \( R \) — Mortar ratio (unitless, typically 1.5 for slab bedding)
• \( Y \) — Yield per bag (cubic feet per bag)

Explanation: The area multiplied by depth gives volume, adjusted by the mortar ratio, then divided by bag yield to get number of bags needed.

3. Importance of Mortar Calculation

Details: Accurate mortar estimation ensures proper slab bedding, prevents material waste, and helps budget for materials.

4. Using the Calculator

Tips: Enter the area in square feet, bedding depth (default 1.5 inches), mortar ratio (default 1.5), and bag yield (default 0.3 ft³/bag). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical bedding depth for paving slabs?
A: Most paving slabs require 1-2 inches of mortar bedding, with 1.5 inches being common for standard applications.

Q2: What does the mortar ratio represent?
A: The ratio accounts for the mortar composition (e.g., 1:5 cement:sand ratio) and compaction factor.

Q3: How do I find the yield per bag?
A: Check the manufacturer's specifications on the mortar mix bag (typically 0.3-0.4 ft³ per 40lb bag).

Q4: Does this include joint mortar?
A: No, this calculates bedding mortar only. Add 10-15% for joint mortar if needed.

Q5: Should I round up the result?
A: Yes, always round up to the nearest whole bag to ensure you have enough material.