Concrete for a 3x20 ft walkway
A standard 3ft wide, 20ft long walkway at 4in depth is a perfect DIY bag project - only about 13 bags of 80lb premix.
Material Totals
Concrete volume (with waste) 0.81 cu yd
80lb premix bags needed 37 bags
60lb premix bags needed 49 bags
Raw volume (no waste) 0.74 cu yd
1 cu yd = 27 cu ft. One 80lb bag covers ~0.6 cu ft; one 60lb bag ~0.45 cu ft. For pours over ~1 cu yd, ready-mix delivery is usually more economical.
Printable Shopping List
Project 20ft x 3ft x 4in
Concrete (80lb bags) (recommended) 37 bags
Concrete (60lb bags) (alternative) 49 bags
Or: ready-mix concrete 0.81 cu yd
Generated by BuildTotals.com | 6/13/2026 | buildtotals.com/tools/concrete-calculator
Estimates include 10% waste factor. Confirm with your supplier before purchasing.
Walkways are one of the best first-concrete projects. The volume is small, forms are simple (two 2x4 boards), and the finishing area is manageable. Use control joints every 3-4 feet to prevent cracking.