The answer will depend on the size of the patio slabs.
140
To determine how many 450mm x 450mm slabs are needed to cover a 5ft x 4ft area, first convert the dimensions to millimeters: 5ft is approximately 1524mm and 4ft is approximately 1219mm. The area of the space is 1524mm x 1219mm = 1,860,756 mm². Each slab covers an area of 450mm x 450mm = 202,500 mm². Dividing the total area by the area of one slab gives you approximately 9.2, so you will need 10 slabs to cover the area completely.
To determine how many 400mm x 400mm slabs are needed to cover an area of 6ft x 8ft, first convert the dimensions to millimeters: 6ft is approximately 1829mm and 8ft is about 2438mm. The area to be covered is 1829mm x 2438mm = 4,467,642mm². Each slab covers an area of 400mm x 400mm = 160,000mm². Dividing the total area by the area of one slab gives approximately 28 slabs needed (4,467,642mm² ÷ 160,000mm² ≈ 27.92).
14
The answer will depend on the size of the patio slabs.
20 I believe
140
You will need 63 44cm x 44cm slabs to cover that area.
To determine how many 450mm x 450mm slabs are needed to cover a 5ft x 4ft area, first convert the dimensions to millimeters: 5ft is approximately 1524mm and 4ft is approximately 1219mm. The area of the space is 1524mm x 1219mm = 1,860,756 mm². Each slab covers an area of 450mm x 450mm = 202,500 mm². Dividing the total area by the area of one slab gives you approximately 9.2, so you will need 10 slabs to cover the area completely.
14
400 at least
The answer will vary slightly depending on assumptions: will the slabs have a space between them, and will you be cutting the slabs to fill fractions. 21 feet is equal to 14.2 of the 450 mm slabs. 19 feet is equal to 12.9 of the slabs. To complete the rectangular area, 14.2 x 12.9 = 183 slabs.
23.41 sq m
305.56
To determine how many slabs of stone you need, first convert the area from square feet to square inches. Since 1 square foot equals 144 square inches, 133 square feet is 133 x 144 = 19,152 square inches. Then, divide the total area by the area of one slab: 19,152 ÷ 40 = 478.8. Therefore, you would need 479 slabs of stone to cover 133 square feet, rounding up to the nearest whole slab.
To calculate the number of paving slabs needed for one square meter, first determine the area of one slab. A slab measuring 600mm x 300mm has an area of 0.6m x 0.3m = 0.18 square meters. Therefore, to cover one square meter, you would need approximately 1 / 0.18 = 5.56 slabs. Rounding up, you would need 6 slabs to cover one square meter.