#5 Rebar Calculator — Bar Count, Weight & Spacing
Estimate #5 (5/8-inch) rebar bar count, weight, and spacing for load-bearing walls, wide footings, and reinforced concrete walls and retaining walls.
Enter Dimensions
Add 10% for standard cuts and overlaps
Results
Bars Needed
38bars
Total Lineal Feet
608lin ft
Total rebar length including waste
Total Weight
406lb
#4 rebar weight per CRSI
Slab Area
240sq ft
Editorial Standards
Each calculator is reviewed for formula accuracy, unit consistency, and alignment with current U.S. building practices before publication. We verify outputs against published engineering references and real-world project data. Learn more about our methodology.
#5 rebar (5/8 inch diameter) is the standard reinforcement size for medium-duty residential and light commercial concrete: load-bearing CMU walls, footings supporting two-story walls, and reinforced concrete walls. Each foot weighs 56% more than #4 and costs ~50% more — only specify it when the engineer or code requires the extra steel area.
This calculator estimates #5 piece count, total linear feet, weight, and lap splice allowance. For lighter applications, use the #4 Rebar Calculator.
How to Estimate #5 Rebar
Bars per Direction = ⌈Dimension ÷ Spacing⌉ + 1. Weight = LF × 1.043 lb/ft.
#5 Rebar Quick Reference
- Diameter: 5/8 inch (0.625 in)
- Weight: 1.043 lb/ft (20.86 lb per 20 ft stick)
- Yield strength: 60,000 psi (Grade 60)
- Min bend dia: 3.75 in (6 × bar dia)
- Class B lap splice: 25 in (40 × bar dia)
- Standard stock: 20 ft or 40 ft sticks
- Cost: ~$0.70-1.10 per LF (2025)
- Steel area: 0.31 sq in (vs 0.20 for #4)
Frequently Asked Questions
What is #5 rebar?
#5 rebar is 5/8 inch nominal diameter deformed bar — used where the additional steel area of #4 is insufficient. ASTM A615 standard, 60,000 psi Grade 60 most common. Weight: 1.043 lb per linear foot, 56% heavier than #4.
When do I use #5 instead of #4 rebar?
Choose #5 for: wider footings (24 inch+), load-bearing CMU walls, reinforced concrete walls under 8 ft tall, residential slabs supporting vehicle loads (driveways with concrete slabs), and structural columns under engineered review.
How much does #5 rebar cost?
$0.70-1.10 per linear foot in 2025, varying by region and volume. About 50% more per foot than #4. A 20 ft stick: $14-22. By the ton: ~$900-1,250 delivered.
How much #5 per 100 sq ft slab at 12 inch OC?
Same piece count as #4: 200 LF per 100 sq ft. But weight is 200 × 1.043 = 209 lb (vs 134 lb for #4). Plan delivery accordingly.
What is the bend radius of #5 rebar?
Minimum 90° hook inside diameter is 6 × bar diameter = 3.75 inches for #5. Standard hook leg length: 12 × bar diameter = 7.5 inches minimum (often rounded to 8 inches in practice).
Looking for the general calculator?
Calculate rebar quantity, spacing, and total weight for concrete slabs, footings, and walls. Covers #3 through #8 bar sizes using CRSI published weight tables.
Open the Rebar Calculator: Bar Count & Weight →