Estimate the number of A4 sheets in 1 kg, you need to know the paper's weight in grams per square meter (GSM). For normal quality A4 paper, the GSM is typically around 80 GSM, which is common for standard office paper. Calculating the Number of Sheets: Size of an A4 sheet: An A4 sheet measures 210 mm x 297 mm, or 0.210 m x 0.297 m. https://a4papersales.com/product/buy-compact-office-printers-online/