{
  "tool": "one_rep_max",
  "version": "1.1.0",
  "summary": "140 kg for 5 reps estimates a one-rep max of 163.3 kg (Epley).",
  "result": {
    "weight": 140,
    "reps": 5,
    "unit": "kg",
    "formula": "epley",
    "oneRepMax": 163.3,
    "estimates": {
      "epley": 163.3,
      "brzycki": 157.5
    },
    "percentages": [
      {
        "percent": 100,
        "load": 163.5
      },
      {
        "percent": 95,
        "load": 155
      },
      {
        "percent": 90,
        "load": 147
      },
      {
        "percent": 85,
        "load": 139
      },
      {
        "percent": 80,
        "load": 130.5
      },
      {
        "percent": 75,
        "load": 122.5
      },
      {
        "percent": 70,
        "load": 114.5
      },
      {
        "percent": 65,
        "load": 106
      },
      {
        "percent": 60,
        "load": 98
      },
      {
        "percent": 55,
        "load": 90
      },
      {
        "percent": 50,
        "load": 81.5
      }
    ],
    "repMaxes": [
      {
        "reps": 1,
        "load": 163.5,
        "percent": 100
      },
      {
        "reps": 2,
        "load": 153,
        "percent": 93.8
      },
      {
        "reps": 3,
        "load": 148.5,
        "percent": 90.9
      },
      {
        "reps": 4,
        "load": 144,
        "percent": 88.2
      },
      {
        "reps": 5,
        "load": 140,
        "percent": 85.7
      },
      {
        "reps": 6,
        "load": 136,
        "percent": 83.3
      },
      {
        "reps": 7,
        "load": 132.5,
        "percent": 81.1
      },
      {
        "reps": 8,
        "load": 129,
        "percent": 78.9
      },
      {
        "reps": 9,
        "load": 125.5,
        "percent": 76.9
      },
      {
        "reps": 10,
        "load": 122.5,
        "percent": 75
      },
      {
        "reps": 11,
        "load": 119.5,
        "percent": 73.2
      },
      {
        "reps": 12,
        "load": 116.5,
        "percent": 71.4
      }
    ],
    "reliable": true
  },
  "method": "Epley (1985): weight × (1 + reps ÷ 30), a single counts as the weight itself. Brzycki (1993): weight × 36 ÷ (37 − reps). Tables round to the nearest 0.5.",
  "url": "https://www.ironledger.app/tools/one-rep-max-calculator?weight=140&reps=5&unit=kg&formula=epley"
}