How many bricks in a 10x10 patio?

A 10×10 patio = 100 sq ft. Standard bricks laid flat (as pavers) cover about 4.5 bricks per sq ft, so you'd need ~450 bricks. Add 10% waste = 495, so buy 500. If using 4×8 pavers: 100 sq ft × 4.5 = 450 pavers.

How much mortar do I need per 100 bricks?

A general rule is 1 bag (70 lb) of mortar mix per 30–40 standard bricks for bed and collar joints. For 100 bricks, you'd need 2.5–3 bags. For large projects, multiply: 500 bricks ÷ 35 = ~15 bags. Always buy 10–15% extra.

Do I need to add waste for brick projects?

Yes — always add 10% for standard walls and patios. Add 15–20% for diagonal or herringbone patterns, irregular shapes, or where many cuts are required at corners. Bricks can also crack during transport or cutting.

What is the difference between a brick and a block?

Bricks are smaller solid or cored units, typically 8×4×2.25 inches, used for facing and structural walls. Concrete masonry units (CMU) or blocks are larger (typically 8×8×16 inches) and used for foundations, load-bearing walls, and retaining walls. Blocks are faster to lay and typically cheaper per square foot.

How long does brick last?

Brick is one of the most durable building materials — a properly built brick wall can last 100–500 years. The mortar typically lasts 25–50 years and may need repointing. The key to longevity is proper drainage and waterproofing so water doesn't penetrate and freeze inside.

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Brick Calculator

Calculate how many bricks and mortar bags you need for your project.

Wall Length (ft)

Wall Height (ft)

Brick Size

Waste Allowance

Results

Wall Area—

Bricks Needed—

Mortar Bags (70-lb)—

Estimated Cost—

How to Calculate How Many Bricks You Need

The brick calculator works by determining the area of your wall or patio, then multiplying by the number of bricks per square foot for your selected brick size. Add your waste percentage and you have your order quantity.

Bricks Per Square Foot

Standard US brick (3-5/8×2-1/4×7-5/8 in) with a 3/8-inch mortar joint: approximately 6.75 bricks per square foot of wall face. Modular brick (same nominal size, slightly different actual): about 7 per sq ft. These counts are for wall face — single-wythe (one brick thick) construction.

Mortar Estimation

One 70-lb bag of mortar mix covers approximately 30–40 standard bricks. For a wall requiring 500 bricks: 500 ÷ 35 = ~15 bags. Mortar shelf life is limited — only mix what you can use in 1–2 hours. Hot, dry weather accelerates setting time.

Patio / Flat Lay

When laying bricks flat as pavers, a standard brick (8×4 nominal including joint) covers about 4.5 bricks per square foot. The calculator's Patio mode uses a flat-lay count. Add polymeric sand between joints for a more durable surface that resists weeds.

Buying Tips

Always order bricks from a single production run to ensure color consistency — slight variations exist between runs. Inspect bricks on delivery for cracks or spalling. Store bricks off the ground on pallets and keep them dry. Wet bricks before laying in hot weather to prevent them from absorbing moisture from the mortar.

Frequently Asked Questions

Standard US brick: ~6.75 bricks per sq ft (single wythe wall). Modular brick: ~7 per sq ft. Always add 10% waste for standard projects, 15% for complex patterns.

One 70-lb bag of mortar covers approximately 30–40 standard bricks. Divide your brick count by 35 for a good estimate. Buy 10–15% extra mortar.

Brick materials cost $0.35–$0.75 per brick. A 20×6 ft wall (~810 bricks + waste) runs $350–$750 in materials. Professional labor adds $15–$30 per sq ft — a 120 sq ft wall could cost $1,800–$3,600 for labor alone.

Any brick wall over 2 feet tall generally needs a concrete footing below the frost line. A simple garden wall under 2 ft can often sit on compacted gravel. Always check local building codes for structural requirements.

Low garden walls and small patios are achievable DIY projects with proper preparation and patience. Structural or load-bearing walls should be built by a qualified mason to ensure safety and compliance with building codes.

Formula sources & accuracy standards: Calculator Methodology · Editorial Policy