Metal Calculator allows you to calculate the approximate weight and length of round and shaped tubes, angles, channels, beams, sheet. The application allows you to calculate the mass of products from metal knowing the length, or the length of knowing the mass. ГОСТ 26020 - 83. ГОСТ 8239-89. ГОСТ 8240-89. ГОСТ 8706-78. ГОСТ 8568-77. ГОСТ 8509-93. ГОСТ 8510-86. ГОСТ 8639-82.