Skip to content

How to count a false ceiling: boards, furring and hangers

Updated October 11, 2026

A suspended ceiling is ordered from the area of the room. The boards or tiles follow from the area and their size; the frame follows from the spacings that the maker of the system gives. This guide counts quantities; it does not design the ceiling.

1. Area and edge

Multiply the room length by its width. The edge channel or wall angle runs round the room: twice the length plus the width.

2. Boards, furring and hangers

Divide the area, increased by the waste, by the area of one board. The furring runs at its spacing, so its length is the area divided by that spacing. One hanger serves the area of the furring spacing times the hanger spacing along it: divide the ceiling area by that and round up.

Worked example: 6 × 4 m room

Boards 1.20 × 2.50 m, furring every 60 cm in 3 m bars, hangers every 1.20 m, 10 % waste, 15 screws and 0.4 kg of compound per m²:

Area 6 × 4 = 24 m², edge channel 20 m.
Boards: 24 × 1.10 ÷ 3 = 8.8, so 9 boards.
Furring: 24 ÷ 0.6 = 40 m, or 14 bars of 3 m.
Hangers: 24 ÷ (0.6 × 1.2) = 33.3, so 34.
Screws 360; jointing compound 9.6 kg.

Lay-in tiles on a grid

For 60 × 60 cm tiles there is a line of profile every 60 cm in both directions: 1/0.6 + 1/0.6 = 3.33 m of profile per m². Main runners every 1.20 m carry the cross tees, and the hangers hang from the main runners.

What this does not cover

The count does not design the ceiling: the frame, the load a hanger carries, the fire, acoustic and humidity requirements and the board type come from the maker’s data and the engineer.

General information, checked at the date shown. It does not replace advice from a professional for your situation.

Share:WhatsApp Facebook LinkedIn

Tools for this guide

BUILNORA

False Ceiling Quantities (boards, furring, tiles)

Plasterboard or lay-in tiles, furring or grid, hangers, screws and jointing compound of a suspended ceiling, from the room size.

BUILNORA

Plasterboard Calculator

Plasterboard sheets, studs, track, furring channels and screws for a partition wall or a suspended ceiling.

Other guides

What must appear on an invoice

Numbering, dates, identifiers, VAT and totals: the checklist, with country specifics.

Invoicing in Morocco: the mandatory mentions

ICE, IF, taxe professionnelle, VAT and total in words: the checklist for a compliant Moroccan invoice.

Auto-entrepreneur in Morocco: how to invoice

No VAT, ICE, turnover tax and ceilings: what to put on your invoices and what to watch.

How to write a quote that gets accepted

Content, validity, deposit, approval and conversion to an invoice: the method for clear, binding quotes.

Purchase order, delivery note and invoice: what is the difference?

Quote → purchase order → delivery note → invoice: what each document proves and when to issue it.

How to calculate VAT

Net to gross, gross to net, several rates, rounding: the formulas with examples.

Margin vs markup: how to calculate them and set your price

Two percentages that look alike but are not: formulas, multiplier, pricing for a target margin and a worked example.

How to set your freelance hourly and day rate

Target income, expenses, taxes, billable weeks and hours: the method to find a rate that really pays you, with an example.

Invoicing as a freelancer in the United Arab Emirates

Permit, VAT thresholds, TRN, tax invoices, corporate tax and pricing: the essentials for UAE freelancers.

How to chase an unpaid invoice, step by step

Clear payment terms, polite then firm reminders, formal notice and late interest: the method to get paid without losing the client.

BUILNORA

How many blocks and how much mortar for a wall

Net area, blocks per m², mortar, cement bags and waste: the method with an example.

BUILNORA

How much concrete for a slab, a footing or a column?

Volume, waste margin, cement dosage, sand, gravel and water: the method to order the right quantities, with an example.

BUILNORA

How much paint do you need for a room?

Wall area, openings, coats, coverage and waste: the method to buy the right number of cans, with an example.

BUILNORA

How many tiles do you need for a floor or a wall?

Area, tile and joint size, waste margin and boxes: the method to order enough tiles from the same batch, with an example.

BUILNORA

Rebar weight per metre: how to estimate the steel of a job

Weight per metre by diameter, total length, laps, waste and 12 m bars: the method to order reinforcing steel, with an example.

BUILNORA

How to calculate a floor screed: volume, cement and sand

Area, thickness, waste, cement dosage, sand and water: the method to order the materials of a sand and cement screed, with an example.

BUILNORA

How to price a construction quote

Quantities, materials, labour, overheads and margin: the method to price a job and send a quote that protects you.

BUILNORA

How to calculate a staircase: risers, treads and slope

Floor-to-floor height, number of risers, riser height, tread depth and Blondel’s comfort rule: the method to lay out a staircase, with a worked example.

BUILNORA

How to calculate excavation volume and truck loads

Length, width and depth, working space, swell and truck capacity: the method to estimate earthwork volumes and loads, with a worked example.

BUILNORA

How to calculate plaster and render for a wall

Net area, coat thickness, waste margin, then mortar, cement and sand: the method to order the right quantity of render, with a worked example.

BUILNORA

How to calculate a plasterboard partition

Boarded area, stud spacing, track and screws: the method to count the materials of a metal-stud partition, with a worked example.

BUILNORA

How to count a joist and hollow-block floor

Span, width, joist spacing, rows of blocks, mesh and topping: the method to order a joist-and-block floor, with an example.

BUILNORA

How to count aluminium joinery

Frame and leaf profiles, glass, door sheets, shutter slats, extruded weight and cladding: the method to order, with an example.

BUILNORA

How to count wooden doors and windows

Timber volume and lengths, board sheets, glass and the cutting plan: the method to order wooden joinery, with an example.

BUILNORA

How to count a fitted kitchen (I, L, U, double I)

Runs, cabinet module, corner units, worktop, plinth, cap and hood: the method to order a kitchen, with an example.

BUILNORA

How to take off a column, a footing and a beam in detail

Concrete, formwork, pours, stripping and reinforcement by mark for a column, footings and a beam, with a worked example.

BUILNORA

How to count a roof: tiles or sheets, battens, rafters

Slope area, tiles or sheets, battens or purlins, rafters and ridge: the method to order a roof, with an example.

BUILNORA

How to count a drainage trench: gravel, pipe and geotextile

Excavation, gravel, backfill, geotextile and pipes of a drainage trench: the method, with an example.

BUILNORA

How to count paving: pavers, sand, base and kerbs

Pavers with joints, sand bed, base, excavation and kerbs of a paved area: the method, with an example.

BUILNORA

How to count a concrete tank, basin or pool

Capacity, excavation, concrete, formwork, steel and lining of a buried box: the method, with an example.

BUILNORA

How to count the steel of a gate, a railing or a grille

Frame tube, infill bars, posts, weight, tubes to buy and surface to paint: the method to order metalwork, with an example.