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REBAR CONVERSION CHART
Concrete Reinforcing Steel Institute Standard A615 Reinforcing Bars
BAR SIZES WEIGHT NOMINAL DIMENSIONS – ROUND SECTIONS
OLD (INCHES) NEW (NOS.) POUNDS PER FOOT DIAMETER INCHES CROSS SECTIONAL AREA - SQ. IN. PERIMETER INCHES
           
1/4 2 0.167 0.250 0.05 0.786
3/8 3 0.376 0.375 0.11 1.178
1/2 4 0.668 0.500 0.20 1.571
5/8 5 1.043 0.625 0.31 1.963
3/4 6 1.502 0.750 0.44 2.356
7/8 7 2.044 0.875 0.60 2.749
1 8 2.670 1.000 0.79 3.142
1 9 3.400 1.128 1.00 3.544
1 1/8 10 4.303 1.270 1.27 3.990
1 1/4 11 5.313 1.410 1.56 4.430
The new bar numbers are based on the number of 1/8 inches included in the nominal diameter of the bar. Bar number 2 in plain rounds only. Bars numbered 9, 10 and 11 are round bars and equivalent in weight and nominal cross-sectional area to the old type 1", 1-1/8" and 1-1/4" square bars.
LOS ANGELES COUNTY FLOOD CONTROL DISTRICT Revised 1-19-71 DATE – JULY, 1932

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