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IWF Sinclair Coefficient and Total Calculator

Sinclair = total · 10^(A · log₁₀(BW/b)²); cap at 1 if BW ≥ b.

Compute the IWF Sinclair coefficient and Sinclair total — the standard cross-bodyweight comparison metric for Olympic weightlifting. Coefficient = 10^(A · log₁₀(bodyweight/b)²) for bodyweight < b, else 1. For the 2025 quadrennium: men A = 0.794381, b = 174.393 kg; women A = 0.897260, b = 148.026 kg. Sinclair total = total kg × coefficient.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

kg
kg

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

X = log₁₀(bw/b); coeff = if(bw < b, 10^(A·X²), 1); Sinclair = total · coeff.

In depth

Compute the IWF Sinclair coefficient and Sinclair total — the standard cross-bodyweight comparison metric for Olympic weightlifting. Coefficient = 10^(A · log₁₀(bodyweight/b)²) for bodyweight < b, else 1. For the 2025 quadrennium: men A = 0.794381, b = 174.393 kg; women A = 0.897260, b = 148.026 kg. Sinclair total = total kg × coefficient.