Type the area and the board width in centimeters. The calculator divides area by width, adds waste, and divides by piece length. A 20 m² deck at 14 cm, 8%, and 4.0 m is 154.29 linear meters and 39 boards. A 35 m² floor at 12 cm, 10%, and 4.8 m is 320.83 linear meters and 67 pieces.
This calculator translates area into a practical purchasing result: how many linear meters of boards and how many pieces you need to order. It is especially useful for decks, timber floors, facades, and board-based cladding. Measure area with the floor area calculator.
Area to cover, Board width (cm), Board length (m) and Waste %. The result shows up here.
The board calculator turns square meters into linear meters. The formula is (area divided by board width) times (1 plus waste). Pieces are ceil(linear meters divided by board length) when you type a length. A 14 cm width is 0.14 m in that division.
A 20 m² deck at 14 cm and 8% is 154.29 linear meters. At 4.0 m length that is 39 boards, because 154.29 / 4 rounds up. A 35 m² floor at 12 cm, 10%, and 4.8 m is 320.83 linear meters and 67 pieces. A 12 m² facade at 9.5 cm, 12%, and 2.4 m is 141.47 linear meters and 59 pieces. Twelve m² at 10 cm and 2 m with no waste is 83.33 linear meters on the fourth card.
Type area to cover and board width in cm. Board length, waste, and price per linear meter are optional. An empty length leaves linear meters only. A comma in 9.5 works like 9,5. Take 20 m² from floor area: 5 by 4 m.
Tiles on the same 18 m² deck at 60×60 cm are 56 pieces on the tile calculator. Adhesive follows square meters. A 14 m perimeter from a 4 by 3 m room is trim, not deck boards.
Eight percent waste on 142.86 net linear meters (20 / 0.14) covers edge cuts and gives 154.29. Pieces round up: 38.57 is 39. Typing width 14 as 14 m instead of 14 cm understates linear meters a hundred times. Read the label: width is in centimeters.
Type 20 and 14, set 8% and 4.0 m, click Calculate, and match 154.29 linear meters and 39 boards. Then 35, 12, 10%, and 4.8: 67 pieces.
Area divided by board width, plus waste, then divided by piece length. 20 m² at 14 cm, 8%, and 4.0 m is 154.29 linear meters and 39 boards.
You need 154.29 linear meters of boards
That equals 39 boards of 4.0 m
Linear meters show the scale of the purchase well, but the piece count is what tells you how many boards actually need to be ordered.
You need 320.83 linear meters
That equals 67 boards
On larger jobs, even a small change in board width can significantly change the total number of linear meters you need to buy.
You need 141.47 linear meters
That equals 59 boards
With narrow boards, the required linear meters grow quickly, which makes this calculator especially useful when comparing different formats.
90.00 linear meters
That equals 23 boards of 4.0 m
How many linear meters of 12 cm board cover 10 m² at 8% waste? 90.00 linear meters, That equals 23 boards of 4.0 m.
94.29 linear meters
That equals 27 boards
How many linear meters of 14 cm board cover a 12 m² kitchen at 10% waste? 94.29 linear meters, That equals 27 boards.
144.00 linear meters
That equals 30 boards
How many linear meters of 18 cm board cover a 24 m² living room? 144.00 linear meters, That equals 30 boards.
77.28 linear meters
That equals 33 boards
How many linear meters of 12 cm board cover a 7.2×1.15 m hallway? 77.28 linear meters, That equals 33 boards.
162.00 linear meters
That equals 41 boards
How many linear meters of 14 cm board cover a 6×3.5 m garage? 162.00 linear meters, That equals 41 boards.
154.29 linear meters. 20 / 0.14 × 1.08. At a 4.0 m board that is 39 pieces.
67 pieces. 320.83 linear meters divided by 4.8, rounded up.
141.47 linear meters and 59 pieces. A narrower board, more linear meters on the same area.
83.33 linear meters, 42 pieces of 2 m. The fourth card.
As 14 in the width field in cm. Typing 0.14 would mean 0.14 cm and overstate linear meters.
A deck and a straight floor often use 8-10%. A facade and diagonals sit nearer 12%. 8% on 20 m² at 14 cm is that 154.29 linear meters.
From floor area: 5 by 4 m. 56 tiles from 18 m² live on the tile calculator.
Round up to 39. A fraction of a board is not on the stack.
A 4 by 3 m perimeter is trim around a room. Boards cover area, so linear meters run much higher.
No. Length only serves piece count. Linear meters use area, width, and waste.
Volume and waste come from the sizes you type. Below are volume and NIST SI units.
Page updated in 2026.
