Tools
Sinclair Calculator
Enter your bodyweight and competition total to get your Sinclair score. Compares athletes across all weight classes on an equal footing. Uses the official 2021-2024 IWF coefficients.
Enter bodyweight and total above
What is the Sinclair Score?
The Sinclair score is a way to compare athletes across different weight classes. A heavier athlete can always lift more than a lighter one, so a raw total doesn't tell you who the better lifter is. The Sinclair formula applies a coefficient based on bodyweight that scales the total up to what a hypothetical athlete at the maximum bodyweight would lift. The result is a single number you can rank across any bodyweight.
The Formula
The IWF defines a maximum bodyweight b for each gender — the point at which the coefficient tops out at 1.0. For athletes below that threshold, a scaling factor is applied based on how far their bodyweight falls below b. Lighter athletes get a larger multiplier; heavier athletes get a smaller one. The result is a total that can be compared fairly across weight classes.
Equations
Sinclair Total = Total × 10(A × X²)
X = log10(bodyweight / b)
Coefficient = 1.0 if bodyweight ≥ b
2021-2024 Coefficients
Men
A = 0.722762521
b = 193.609 kg
Women
A = 0.787004341
b = 153.757 kg
Train with Toronto Weightlifting
Coached programming, competition prep, and a platform that tracks your lifts and Sinclair score over time. Join and start building your total.
Join FreeRelated Tools
- Plate Calculator: see which plates to load for any weight
- 1RM Calculator: estimate your one rep max from any set
- Percentage Calculator: get a full training percentage table from your 1RM
- Weight Class Calculator: find your IWF weight category