Decking Calculator

Decking Calculator

Enter the required inputs into this calculator to get quick deck material and cost estimations for your deck building project.

Size Of Your Deck

Length

m ▾

Width

m ▾

Size Of Decking Boards

Length

m ▾

Width

m ▾

Material Estimations

Fasteners Used:

Screws/Nails Hidden Clips

Cost Estimations

Price Per Board

Cost Of Fasteners

The decking calculator is used to estimate the quantity of materials and the total cost required to build or resurface a deck. It helps minimize material waste and reduces the chances of overordering.

This calculator is specifically designed to help you during the planning and construction stages of your deck project. By providing precise calculations, it allows you to plan effectively and achieve a cost-efficient deck installation.

Remember that the cost of decking materials and overall project expenses can vary depending on design choices, location, and specific project requirements.

What Are The Components of The Deck?

A deck is made up of several essential structural elements. Below is an overview of the key components needed for constructing a durable deck.

Post:

Posts are vertical supports that transfer the deck’s load to the ground. They hold up beams and joists and are critical for maintaining the deck’s stability.

Beam:

Beams are horizontal support members that spread the deck’s weight across the posts. Correct beam placement is vital for ensuring the strength and durability of the deck structure.

Joist:

Joists are horizontal framing boards positioned under the decking surface. They form the primary structural foundation to which deck boards are attached.

Deck Flooring:

Deck flooring refers to the surface boards laid on top of the joists. Common choices for outdoor decks include natural wood and durable composite materials.

Fastener:

Fasteners, such as nails, screws, or hidden clips, are used to hold the deck components securely in place, ensuring the deck remains stable and structurally sound over time.

Decking Material Types:

The table below highlights popular decking materials along with their key features, advantages, and potential limitations.

Decking Material	Description	Advantages	Disadvantages
Pressure-Treated Wood	Chemically treated to resist decay and insects.	Budget-friendly and widely available.	Requires frequent maintenance; may warp or crack over time.
Cedar & Redwood	Naturally resistant to rot and insects.	Attractive appearance and natural durability.	Higher cost and limited availability in some regions.
Tropical Hardwood (e.g., Ipe)	Dense hardwood with exceptional durability.	Long lifespan and minimal maintenance.	Expensive and difficult to install.
Composite Decking	Blend of wood fibers and plastic.	Low maintenance and resistant to moisture.	Higher initial cost; can retain heat.
PVC Decking	Fully synthetic plastic material.	Moisture-resistant and long-lasting.	Limited color options and higher price.
Aluminum Decking	Lightweight metal decking system.	Extremely durable and low maintenance.	Can feel hot under direct sunlight.
Bamboo Decking	Eco-friendly decking made from bamboo.	Sustainable with a unique appearance.	Requires maintenance and proper sealing.
Composite Bamboo Decking	Bamboo fibers combined with recycled plastic.	Durable and environmentally friendly.	Limited availability and higher support needs.
Concrete	Poured slab or concrete paver system.	Highly durable and customizable.	Hard surface and professional installation required.
Stone or Tile	Natural stone or porcelain tiles.	Elegant and long-lasting.	Expensive and slippery when wet.

How To Calculate The Deck Footage?

Follow these steps to accurately calculate your deck footage:

Measure the length and width of the deck
Compute the total area of the deck
Measure the dimensions of the decking boards
Divide the deck area by the board area and add 10% extra to account for waste

Example:

Consider building a rectangular deck that is 12 ft long and 8 ft wide. The decking boards are 10 ft long and 6 inches wide. Each board costs $5, and screw packs are priced at $200.

Solution:

Deck Area = 12 × 8 = 96 ft²

Board Width = 6 ÷ 12 = 0.5 ft

Board Area = 0.5 × 10 = 5 ft²

Boards Needed = (96 ÷ 5) × 1.1 ≈ 22 boards

Calculating Fasteners:

Screws Required = 3.5 × 96 = 336

Hidden Fasteners = 1.75 × 96 = 168

Calculating Cost:

Deck Board Cost = Price × Number of Boards

Deck Boards Cost = 5 × 22 = $110

Total Project Cost = 110 + 200 = $310

Using a deck material calculator makes it easy to get accurate cost estimates quickly, saving time and avoiding mistakes.

What Are Common Deck Board Sizes?

The most frequently used deck board is 1×6, with a thickness of around ¾ inch and an actual width between 5¼″ and 5½″.

Other popular board sizes include:

1×4
2×6
2×8

What Materials Do I Need For Decking?

The materials you need will vary depending on your budget, design choices, and availability. Common decking materials and essential tools include:

Pressure-treated lumber
Composite decking boards
PVC decking
Exotic hardwoods like Ipe, Tigerwood, or Mahogany
Framing lumber such as Cedar, Pine, Fir, or Spruce
Tape measure
Post hole digger
Hammer
Power nailer or nail gun