Mortar Bed Calculator for Paving Slabs

Mortar Volume Formula:

\[ M = \frac{A \times D \times R}{Y} \]

Area:

ft²

Bedding Depth:

inches

Mortar Ratio:

Yield per Bag:

ft³/bag

Mortar Volume (ft³):

Unit Converter ▲

Unit Converter ▼

From:	To:

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

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

Purpose: It helps landscapers and DIYers determine how much mortar is required for paving projects.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ M = \frac{A \times D \times R}{Y} \]

Where:

\( M \) — Mortar volume (cubic feet)
\( A \) — Area to be paved (square feet)
\( D \) — Bedding depth (inches, converted to feet)
\( R \) — Mortar ratio (unitless)
\( Y \) — Yield per bag (cubic feet per bag)

Explanation: The area is multiplied by depth (converted to feet) and mortar ratio, then divided by yield to determine number of bags needed.

3. Importance of Mortar Calculation

Details: Proper mortar estimation ensures stable paving, prevents slab movement, and helps with accurate material purchasing.

4. Using the Calculator

Tips: Enter the area in square feet, bedding depth (default 1.5 inches), mortar ratio (default 1.2), and yield per bag (default 0.3 ft³/bag). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical bedding depth?
A: Most paving slabs require 1-2 inches of mortar bedding for proper support.

Q2: What does the mortar ratio represent?
A: The ratio accounts for mortar composition (e.g., 1:4 cement:sand mix) and compaction factor.

Q3: How do I find the yield per bag?
A: Check the manufacturer's specifications on the mortar bag packaging.

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

Q5: How do I convert to number of bags?
A: Divide the result by the yield per bag value you entered.