# Sinclair

> 2021

- Equation: `S = 10^(A × (log₁₀(bw / b))²) for bw ≤ b, else 1; Sinclair total = total × S`
- Variables:
  - `S`: Sinclair coefficient.
  - `total`: Snatch + clean & jerk, in kilograms.
  - `bw`: Bodyweight in kilograms.
  - `A`: Published constant for sex.
  - `b`: Reference bodyweight for sex, in kilograms.
- Authors: Sinclair, R. G.; International Weightlifting Federation
- Source: IWF Sinclair Coefficients, Olympiad 2021–2024
- DOI: None
- Document: https://iwf.sport/wp-content/uploads/downloads/2023/05/2021-Sinclair_Coefficients.pdf

Official IWF coefficients for 1 January 2021–31 December 2024 (men A=0.722762521, b=193.609 kg; women A=0.787004341, b=153.757 kg). For snatch + clean & jerk totals.