Rebar Weight Calculator

Rebar Weight is evaluated from Bar Size Designation, Total Linear Feet and Number of Bars. The calculation reports Weight per Linear Foot, Nominal Diameter and Cross-Sectional Area.

Results

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About the Rebar Weight Calculator

Rebar Weight is treated here as a quantitative relation between Bar Size Designation, Total Linear Feet, Number of Bars and Length per Bar and Weight per Linear Foot, Nominal Diameter, Cross-Sectional Area and Total Linear Feet.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
Weight (lb) = total linear feet x weight per foot
#3 = 0.376 lb/ft
#4 = 0.668 lb/ft
#5 = 1.043 lb/ft
#6 = 1.502 lb/ft
#7 = 2.044 lb/ft
#8 = 2.670 lb/ft
#9 = 3.400 lb/ft
#10 = 4.303 lb/ft
#11 = 5.313 lb/ft

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

Weight (lb) = total linear feet x weight per foot
#3 = 0.376 lb/ft
#4 = 0.668 lb/ft
#5 = 1.043 lb/ft
#6 = 1.502 lb/ft
#7 = 2.044 lb/ft
#8 = 2.670 lb/ft
#9 = 3.400 lb/ft
#10 = 4.303 lb/ft
#11 = 5.313 lb/ft

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Residential Slab — 20×30 ft Grid

Inputs

bar_size: #4 (1/2 in) num_bars: 39 bar_length_ft: 20

Weight per Linear Foot: 0.668 lb/ft. Nominal Diameter: 0.5 in. Cross-Sectional Area: 0.2 in^2. Total Linear Feet: 780 lf. Total Weight: 521 lb. Total Weight: 0.261 tons

With Bar Size Designation = #4 (1/2 in), Number of Bars = 39 and Length per Bar = 20 as the stated inputs, the result is Weight per Linear Foot = 0.668 lb/ft, Nominal Diameter = 0.5 in and Cross-Sectional Area = 0.2 in^2. Each value corresponds to the declared output fields.

Example 2: Column Reinforcement — 12-inch Square Column

Inputs

bar_size: #8 (1 in) num_bars: 4 bar_length_ft: 12

Weight per Linear Foot: 0.668 lb/ft. Nominal Diameter: 0.5 in. Cross-Sectional Area: 0.2 in^2. Total Linear Feet: 48 lf. Total Weight: 32.1 lb. Total Weight: 0.016 tons

With Bar Size Designation = #8 (1 in), Number of Bars = 4 and Length per Bar = 12 as the stated inputs, the result is Weight per Linear Foot = 0.668 lb/ft, Nominal Diameter = 0.5 in and Cross-Sectional Area = 0.2 in^2. Each value corresponds to the declared output fields.

Example 3: Highway Bridge Deck

Inputs

bar_size: #5 (5/8 in) length_ft: 3600

Weight per Linear Foot: 0.668 lb/ft. Nominal Diameter: 0.5 in. Cross-Sectional Area: 0.2 in^2. Total Linear Feet: 3,600 lf. Total Weight: 2,404.8 lb. Total Weight: 1.202 tons

With Bar Size Designation = #5 (5/8 in) and Total Linear Feet = 3,600 as the stated inputs, the result is Weight per Linear Foot = 0.668 lb/ft, Nominal Diameter = 0.5 in and Cross-Sectional Area = 0.2 in^2. Each value corresponds to the declared output fields.

Example 4: Retaining Wall — #6 Vertical Steel

Inputs

bar_size: #6 (3/4 in) num_bars: 50 bar_length_ft: 14

Weight per Linear Foot: 0.668 lb/ft. Nominal Diameter: 0.5 in. Cross-Sectional Area: 0.2 in^2. Total Linear Feet: 700 lf. Total Weight: 467.6 lb. Total Weight: 0.234 tons

With Bar Size Designation = #6 (3/4 in), Number of Bars = 50 and Length per Bar = 14 as the stated inputs, the result is Weight per Linear Foot = 0.668 lb/ft, Nominal Diameter = 0.5 in and Cross-Sectional Area = 0.2 in^2. Each value corresponds to the declared output fields.

Common Use Cases

Calculate total weight of rebar for a concrete slab order
Find linear feet of rebar from a known weight
Estimate rebar material cost by bar designation