Choose a trade

Deck fascia Calculator

Estimate fascia stock lengths around deck edges.

Back to the toolbox

How to use this calculator

Your measurements

Choose the unit beside each measurement. Changing a unit converts your value.

Item name (optional)

View your estimate

Exclude edges without fascia. Corner joints and cutting layout may require extra stock.

YOUR ESTIMATE

Stock lengths to buy

Total length with waste6.6 m

Net length6 m

Whole quantities are rounded up.

PLAN YOUR PROJECT COST

Pricing calculator

Use your supplier’s rate or enter a quoted total. Save each estimate to your project and print everything together.

What are you pricing?

Price is per

Price (optional)

Currency label

Your selected quantity already includes any allowance shown in that result. Check whether you are pricing individual items or whole packs. Delivery, tax and labour are not added automatically. A quoted total applies only to this saved calculation.

Deck fascia Calculator: measuring notes and method

Record individual fascia pieces

Measure steps and returns separately and record each required cut length before adding them together.

Check mitres and continuous pieces

Equal total length does not ensure that the stock can provide the required cuts. Allow for end trimming and specified joint positions in a cutting list rather than relying only on pooled length.

Formula

Required length = length per run × runs × (1 + waste ÷ 100). Stock count = required length ÷ stock length, rounded up.

Worked examples in metric and imperial units

Illustrative values match Reset example and stay fixed when you edit the calculator. Both columns describe the same calculation; converted inputs are rounded.

Metric worked example

Required length per run: 6 m
Quantity: 1
Stock length: 3 m
Waste allowance: 10 %

Stock lengths to buy: 3

Imperial worked example

Required length per run: 19.685 ft
Quantity: 1
Stock length: 9.8425 ft
Waste allowance: 10 %

Stock lengths to buy: 3

Follow the calculation

Lengths in this working are in metres.

Net required length = 6 × 1 = 6 m.
Stock count = 6 × 1.1 ÷ 3, rounded up. This assumes usable offcuts.

Reviewed 19 October 2026. How calculations are checked · Report a correction

Related calculators

Decking CalculatorEstimate full-length board rows across a deck.Deck joists CalculatorEstimate joists from a specified centre spacing.Deck fixings CalculatorEstimate screws from board-to-joist intersections.Deck coating CalculatorEstimate deck oil, stain or coating from measured surface area and product coverage.

PRACTICAL READING

Understand the inputs. Check the order.

Measurement methods and worked examples to use alongside this calculator.

Count deck boards across the width and cuts along the lengthBoard width, gaps and stock lengths create two separate quantity checks.
Estimate deck fixings and finish from the selected layoutCount fixing locations and coated faces separately from the deck footprint.
Build a measurement register you can check laterRecord where each number came from before it becomes part of a material order.
Choose an allowance you can explainSeparate measured quantity, cutting loss and uncertainty instead of adding an automatic percentage everywhere.

Browse all guides →