Soapstone Weight Calculator

Soapstone weighs approximately 170 lb/ft³, making it slightly lighter than granite which typically weighs 175-180 lb/ft³. For a standard 1.25-inch thick countertop, soapstone weighs about 17.7 lb/ft² compared to granite's 18-20 lb/ft².

Yes, soapstone requires proper cabinet support just like any natural stone. Standard kitchen cabinets can typically support soapstone if they're in good condition, but you should ensure supports are placed every 24 inches and use plywood subtops for added stability.

Soapstone density ranges from 160-185 lb/ft³ depending on talc content and mineral composition. Higher talc content makes softer, lighter soapstone, while harder varieties with more quartz and magnesite are denser. Most commercial soapstone averages around 170 lb/ft³.

Standard soapstone countertops are 1.25 inches (3 cm) thick, though they're also available in 0.75 inch (2 cm) and 1.5 inch thicknesses. Thicker slabs are more durable and heat-resistant but add significant weight—a 1.5-inch countertop weighs about 21 lb/ft².

Most residential floors can support soapstone islands since the weight is distributed over a large area. A typical 4' × 6' island with 1.25-inch soapstone weighs around 425 pounds total, or about 18 lb/ft²—well within standard floor load capacities of 40+ lb/ft².