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Sinclair Coefficient Calculator

Work out sinclair coefficient instantly with clear inputs, formula shown and shareable results.

About Sinclair Coefficient Calculator

The Sinclair coefficient answers what an Olympic weightlifter would total if they were the same relative strength but at the heaviest class body weight. It is 10^(A log10(bw/b)^2), reaching 1.0 at the reference weight and rising for lighter lifters. A 250 kg total at 85 kg becomes about 295 kg Sinclair for a man, which is how the best-lifter award is decided.

Formulas

Sinclair coefficient

coeff = 10^(A x log10(bodyweight / b)^2), 1.0 above b

Sinclair total

total x coefficient

Worked example

With the default values below, Sinclair Coefficient Calculator returns Sinclair Total of 309.26. Change any input above and every figure here is recalculated in your browser.

Inputs used

Weightlifting totalminimum 0 kg
250 kg
Body weightaccepts 25–250 kg
85 kg
Sexone of Male, Female
Male

Results

Sinclair Total
309.26 kg
Sinclair Coefficient
1.2370
Total Relative To Body Weight
2.941 x bodyweight
Reference Body Weight
193.61 kg

Step by step

  1. 1Values used
  2. 2Sinclair coefficient
  3. 3Sinclair total
  4. 4Sinclair Total= 309.26 kg
  5. 5Sinclair Coefficient= 1.2370
  6. 6Total Relative To Body Weight= 2.941 x bodyweight
  7. 7Reference Body Weight= 193.61 kg

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.

Frequently Asked Questions

Why is the coefficient 1.0 for heavyweights?

Because the formula scales everyone up to the reference body weight, and lifters already at or above it need no adjustment.

Is Sinclair used in powerlifting?

No - it is specific to Olympic weightlifting and updated each Olympic cycle. Powerlifting uses Wilks, DOTS or IPF GL.

Related Calculators

Sinclair Coefficient Calculator – Calculate Sinclair Total