An 80 lb bag of standard concrete mix (like Quikrete or Sakrete) yields about 0.6 cubic feet of mixed concrete. That's the same as 60% of a cubic foot, or about 4.5 gallons of wet mix.
To convert to other quantities: • 1 cubic yard = 27 cubic feet = 45 × 80 lb bags • 1 cubic foot = 1.67 × 80 lb bags (round up to 2) • 1 standard wheelbarrow load = ~3–4 cu ft = 5–7 × 80 lb bags
A 60 lb bag yields about 0.45 cu ft — one full cubic yard takes 60 of them. A 50 lb bag yields about 0.375 cu ft.
Bagged mix costs around $5–$7 per 80 lb bag at most home centers in 2026. That's about $225–$315 per equivalent cubic yard — significantly more expensive than ready-mix per yard, but worth it for small jobs where the short-load fee or full truck minimum makes ready-mix uneconomical.
Mixing rule of thumb: 1 bag = about 1 gallon of water. Mix until the consistency holds a peak but is still spreadable.