Enter a price and a floor area to get the price per square metre and per square foot, to the penny, with the workings. The calculator also works backwards: the total price from a price per square metre or foot, or the floor area your budget buys. Square feet and square metres are converted with the exact legal definition: 1 sq ft = 0.09290304 m².
Choose what to work out
'Price per m²' divides the price by the floor area. 'Total price' multiplies a reference price per square metre or foot by the floor area, to set a home against recent sales nearby. 'Floor area' divides your budget by the local price per square metre or foot; the area is rounded down to the nearest 0.01, so it never goes over budget.
Square metres or square feet
Floor areas come in square metres or square feet. An Energy Performance Certificate (EPC) gives the total floor area in square metres, measured to the inside of the external walls. Choose the unit you have: the result shows the price per m² and per sq ft either way. A square foot is exactly 0.09290304 m², because the Weights and Measures Act 1985 defines the yard as 0.9144 metre and the square foot as one-ninth of a square yard.
Check the floor area
Tick 'Compare with a measured floor area' and enter another figure for the same home in square metres, such as the total floor area on its EPC. You see the gap, and the price per square metre and per square foot on the measured area. Unlike France's loi Carrez, no UK statute sets a tolerance for a smaller floor area or a price reduction, so the gap is a point to raise before you commit to buy.
Rounding and reuse
Prices are rounded to the nearest penny, with halves rounded up; areas and percentages to two decimal places. Copy the workings in one click, export them as a CSV file or save them to Priostack.
Price per m² = price ÷ floor area in m²; price per sq ft = price ÷ floor area in sq ft.
Total price = price per m² (or per sq ft) × floor area; floor area for a budget = budget ÷ price per m² (or per sq ft).
Floor area in m² = floor area in sq ft × 0.09290304; price per m² = price per sq ft ÷ 0.09290304.
Example: a 1,000 sq ft flat at £300,000
The flat costs £300,000 ÷ 1,000 sq ft = £300.00 per square foot. In square metres, 1,000 sq ft × 0.09290304 = 92.90304 m², so the price per square metre is £300,000 ÷ 92.90304 = £3,229.17. If its EPC gives a total floor area of 85 m², the gap is 7.90 m², or 8.51% of the stated area, and the price comes to £3,529.41 per square metre of measured area.
