Enter a price and a size in whichever units you have them. Everything else is worked out at the same time, so you can read the same property in dirhams, US dollars, euros, pounds, francs, renminbi or rupees, per square foot and per square metre.
Dubai and Abu Dhabi prices are quoted and contracted in dirhams. Every other figure here is an indicative conversion, not a quotation.
A square metre is 10.7639 square feet, so a price per square metre is roughly eleven times the price per square foot for the very same unit. The Gulf quotes per square foot, most of Europe quotes per square metre, and the currency sits on top of that, which is where most of the confusion comes from.
The measurement itself matters as much as the currency. Prices here are usually quoted on the suite or built up area of the unit. Listings in mainland China are normally quoted on gross built area, which includes a share of the corridors, lobbies and plant rooms, so the same flat carries a larger stated size and a lower price per square metre. When you compare two markets, check what is being measured before you compare the numbers.
In mainland China a total is stated in units of ten thousand renminbi, so 2,600,000 renminbi is spoken and written as 260 wan, and the headline figure is renminbi per square metre. Hong Kong uses square feet. Taiwan uses the ping, which is 3.3058 square metres. India quotes per square foot, like the Gulf, but states totals in lakh and crore, a crore being ten million rupees.