Rebar Weight and Length Converter
Convert between Rebar Length and Total Weight for ASTM A615 (Imperial) and DIN 488 (Metric) standards. Essential for civil engineering estimation and concrete reinforcement logistics.
About
In reinforced concrete construction, the accurate estimation of steel tonnage is a prerequisite for budgeting, structural integrity checks, and logistics. Engineers specify reinforcing bars (rebar) by length and count on blueprints, but suppliers quote and ship material by weight (tons or kilograms). Miscalculating this conversion can result in ordering insufficient material for a slab or overpaying for freight.
This calculator provides a precise conversion between linear length and total weight for standard rebar sizes. It covers both the US Imperial system (ASTM A615, sizes #3 through #18) and the European Metric system (DIN 488, 6mm to 50mm). Rather than using a generic density for steel, this tool utilizes the specific linear density values mandated by industry standards, ensuring that your billing weights match the theoretical weights used in contract documents.
Formulas
The calculation is based on the linear density (λ) defined by the standard. To find Weight (W) from Length (L):
To find Length (L) from a given Weight (W):
Reference Data
| Bar Size (Imperial) | Diameter (in) | Weight (lb/ft) | Bar Size (Metric) | Diameter (mm) | Mass (kg/m) |
|---|---|---|---|---|---|
| #3 | 0.375 | 0.376 | 6mm | 6 | 0.222 |
| #4 | 0.500 | 0.668 | 8mm | 8 | 0.395 |
| #5 | 0.625 | 1.043 | 10mm | 10 | 0.617 |
| #6 | 0.750 | 1.502 | 12mm | 12 | 0.888 |
| #8 | 1.000 | 2.670 | 16mm | 16 | 1.580 |
| #10 | 1.270 | 4.303 | 25mm | 25 | 3.853 |
| #14 | 1.693 | 7.650 | 32mm | 32 | 6.313 |
| #18 | 2.257 | 13.600 | 50mm | 50 | 15.413 |