The number that blew my mind on our basement reno was 37 bags of concrete mix
We were doing a small basement slab pour in our 1950s house in Edmonton, maybe a 10x12 area, and I figured we'd need maybe 15 bags of that 80lb stuff from Home Depot. By the time we'd dug out the old floor, added rebar and gravel, and realized the slope was jacked, we ended up at 37 bags. That's like 3,000 pounds of concrete I had to haul down the stairs one by one, and my back still hurts thinking about it. The thing is, the bag calculators online are total garbage for old houses with uneven floors and random depth requirements. We had to go back to Rona twice, and the second time the guy just laughed at me. Has anyone else had a concrete project where the number of bags ended up way higher than you planned?