{
 "meta": {
  "title": "Rebar size chart \u2014 US (#3\u2013#18), soft-metric and Canadian CSA",
  "standards": [
   "ASTM A615/A615M",
   "ASTM A706/A706M",
   "ASTM A996",
   "ASTM A1035",
   "CSA G30.18"
  ],
  "formulas": {
   "imperial_3_to_8": "d = n/8 inch",
   "imperial_9_and_up": "d = (equal-area square side) \u00d7 2/\u221a\u03c0   [2/\u221a\u03c0 = 1.128379]",
   "area": "A = \u03c0/4 \u00d7 d\u00b2",
   "weight": "w = A \u00d7 \u03c1,  \u03c1 = 7850 kg/m\u00b3 (0.28360 lb/in\u00b3)",
   "csa": "area is the defined quantity (rounded mm\u00b2); diameter is derived as d = \u221a(4A/\u03c0)"
  },
  "SCOPE_NOTICE": "Sizes, areas and weights only. NO cover depths, development lengths, lap splice lengths or bend diameters \u2014 those are ACI 318 design provisions that depend on concrete strength, exposure, bar coating and member type, and cannot be reduced to a lookup table.",
  "rows": {
   "imperial": 11,
   "csa": 8,
   "grades": 6
  }
 },
 "columns": [
  "bar",
  "system",
  "soft_metric",
  "dia_in",
  "dia_mm",
  "area_sqin",
  "area_mm2",
  "perimeter_in",
  "lb_per_ft",
  "kg_per_m"
 ],
 "rows": [
  {
   "bar": "#3",
   "system": "ASTM A615 (inch)",
   "soft_metric": "10M",
   "dia_in": 0.375,
   "dia_mm": 9.5,
   "area_sqin": 0.11,
   "area_mm2": 71.0,
   "perimeter_in": 1.178,
   "lb_per_ft": 0.376,
   "kg_per_m": 0.559
  },
  {
   "bar": "#4",
   "system": "ASTM A615 (inch)",
   "soft_metric": "13M",
   "dia_in": 0.5,
   "dia_mm": 12.7,
   "area_sqin": 0.2,
   "area_mm2": 127.0,
   "perimeter_in": 1.571,
   "lb_per_ft": 0.668,
   "kg_per_m": 0.994
  },
  {
   "bar": "#5",
   "system": "ASTM A615 (inch)",
   "soft_metric": "16M",
   "dia_in": 0.625,
   "dia_mm": 15.9,
   "area_sqin": 0.31,
   "area_mm2": 198.0,
   "perimeter_in": 1.963,
   "lb_per_ft": 1.044,
   "kg_per_m": 1.554
  },
  {
   "bar": "#6",
   "system": "ASTM A615 (inch)",
   "soft_metric": "19M",
   "dia_in": 0.75,
   "dia_mm": 19.0,
   "area_sqin": 0.44,
   "area_mm2": 285.0,
   "perimeter_in": 2.356,
   "lb_per_ft": 1.503,
   "kg_per_m": 2.237
  },
  {
   "bar": "#7",
   "system": "ASTM A615 (inch)",
   "soft_metric": "22M",
   "dia_in": 0.875,
   "dia_mm": 22.2,
   "area_sqin": 0.6,
   "area_mm2": 388.0,
   "perimeter_in": 2.749,
   "lb_per_ft": 2.046,
   "kg_per_m": 3.045
  },
  {
   "bar": "#8",
   "system": "ASTM A615 (inch)",
   "soft_metric": "25M",
   "dia_in": 1.0,
   "dia_mm": 25.4,
   "area_sqin": 0.79,
   "area_mm2": 507.0,
   "perimeter_in": 3.142,
   "lb_per_ft": 2.673,
   "kg_per_m": 3.978
  },
  {
   "bar": "#9",
   "system": "ASTM A615 (inch)",
   "soft_metric": "29M",
   "dia_in": 1.128,
   "dia_mm": 28.7,
   "area_sqin": 1.0,
   "area_mm2": 645.0,
   "perimeter_in": 3.544,
   "lb_per_ft": 3.401,
   "kg_per_m": 5.061
  },
  {
   "bar": "#10",
   "system": "ASTM A615 (inch)",
   "soft_metric": "32M",
   "dia_in": 1.27,
   "dia_mm": 32.3,
   "area_sqin": 1.27,
   "area_mm2": 817.0,
   "perimeter_in": 3.99,
   "lb_per_ft": 4.311,
   "kg_per_m": 6.416
  },
  {
   "bar": "#11",
   "system": "ASTM A615 (inch)",
   "soft_metric": "36M",
   "dia_in": 1.41,
   "dia_mm": 35.8,
   "area_sqin": 1.56,
   "area_mm2": 1007.0,
   "perimeter_in": 4.43,
   "lb_per_ft": 5.314,
   "kg_per_m": 7.908
  },
  {
   "bar": "#14",
   "system": "ASTM A615 (inch)",
   "soft_metric": "43M",
   "dia_in": 1.693,
   "dia_mm": 43.0,
   "area_sqin": 2.25,
   "area_mm2": 1452.0,
   "perimeter_in": 5.319,
   "lb_per_ft": 7.661,
   "kg_per_m": 11.401
  },
  {
   "bar": "#18",
   "system": "ASTM A615 (inch)",
   "soft_metric": "57M",
   "dia_in": 2.257,
   "dia_mm": 57.3,
   "area_sqin": 4.0,
   "area_mm2": 2581.0,
   "perimeter_in": 7.091,
   "lb_per_ft": 13.616,
   "kg_per_m": 20.262
  },
  {
   "bar": "10M",
   "system": "CSA G30.18 (metric)",
   "soft_metric": "",
   "dia_in": 0.444,
   "dia_mm": 11.3,
   "area_sqin": 0.16,
   "area_mm2": 100,
   "perimeter_in": 1.394,
   "lb_per_ft": 0.527,
   "kg_per_m": 0.785
  },
  {
   "bar": "15M",
   "system": "CSA G30.18 (metric)",
   "soft_metric": "",
   "dia_in": 0.628,
   "dia_mm": 16.0,
   "area_sqin": 0.31,
   "area_mm2": 200,
   "perimeter_in": 1.972,
   "lb_per_ft": 1.055,
   "kg_per_m": 1.57
  },
  {
   "bar": "20M",
   "system": "CSA G30.18 (metric)",
   "soft_metric": "",
   "dia_in": 0.769,
   "dia_mm": 19.5,
   "area_sqin": 0.47,
   "area_mm2": 300,
   "perimeter_in": 2.417,
   "lb_per_ft": 1.582,
   "kg_per_m": 2.355
  },
  {
   "bar": "25M",
   "system": "CSA G30.18 (metric)",
   "soft_metric": "",
   "dia_in": 0.993,
   "dia_mm": 25.2,
   "area_sqin": 0.78,
   "area_mm2": 500,
   "perimeter_in": 3.122,
   "lb_per_ft": 2.637,
   "kg_per_m": 3.925
  },
  {
   "bar": "30M",
   "system": "CSA G30.18 (metric)",
   "soft_metric": "",
   "dia_in": 1.175,
   "dia_mm": 29.9,
   "area_sqin": 1.09,
   "area_mm2": 700,
   "perimeter_in": 3.693,
   "lb_per_ft": 3.692,
   "kg_per_m": 5.495
  },
  {
   "bar": "35M",
   "system": "CSA G30.18 (metric)",
   "soft_metric": "",
   "dia_in": 1.405,
   "dia_mm": 35.7,
   "area_sqin": 1.55,
   "area_mm2": 1000,
   "perimeter_in": 4.413,
   "lb_per_ft": 5.275,
   "kg_per_m": 7.85
  },
  {
   "bar": "45M",
   "system": "CSA G30.18 (metric)",
   "soft_metric": "",
   "dia_in": 1.721,
   "dia_mm": 43.7,
   "area_sqin": 2.33,
   "area_mm2": 1500,
   "perimeter_in": 5.406,
   "lb_per_ft": 7.912,
   "kg_per_m": 11.775
  },
  {
   "bar": "55M",
   "system": "CSA G30.18 (metric)",
   "soft_metric": "",
   "dia_in": 2.221,
   "dia_mm": 56.4,
   "area_sqin": 3.88,
   "area_mm2": 2500,
   "perimeter_in": 6.976,
   "lb_per_ft": 13.187,
   "kg_per_m": 19.625
  }
 ]
}