Sinclair Score Calculator

Calculator Inputs

Athlete name

Meet or session

Gender

Measurement unit

Input method

Decimal precision

Bodyweight

Use official weigh-in bodyweight when available.

Snatch

Clean & jerk

Competition total

Use this when only the final total is known.

Example Data Table

Lifter	Gender	Bodyweight (kg)	Snatch (kg)	Clean & Jerk (kg)	Total (kg)	Coefficient	Sinclair Score
Lifter A	Male	73.0	140.0	175.0	315.0	1.367106	430.638
Lifter B	Female	59.0	92.0	118.0	210.0	1.357552	285.086
Lifter C	Male	89.0	155.0	190.0	345.0	1.224310	422.387
Lifter D	Female	71.0	105.0	130.0	235.0	1.227460	288.453

These sample values illustrate how lighter bodyweights can earn higher coefficients for equal or similar totals.

Formula Used

The calculator converts all entries to kilograms, computes the Sinclair coefficient, then multiplies the competition total by that coefficient.

Sinclair Score = Total × Coefficient Coefficient = 10^(A × (log10(bodyweight ÷ b))^2), when bodyweight ≤ b Coefficient = 1, when bodyweight > b

Men constants

A = 0.700767868987
b = 201.158959685 kg

Women constants

A = 0.674101456862
b = 163.919086375 kg

If you enter snatch and clean & jerk, the calculator first adds them to get the competition total. If you enter total only, it uses that value directly.

How to Use This Calculator

Choose the athlete gender and the measurement unit you want to enter.
Enter the official bodyweight from weigh-in or the closest verified training bodyweight.
Select either individual lifts or a final competition total.
Provide snatch and clean & jerk, or enter the total directly.
Pick your preferred result precision, then press the calculate button.
Review the Sinclair score, coefficient, normalized gain, and detailed result table.
Export the summary as CSV or PDF when you need records or sharing.

Frequently Asked Questions

1) What does a Sinclair score show?

It adjusts an athlete’s total for bodyweight so lifters from different weight ranges can be compared on one common scale.

2) Do I need snatch and clean & jerk values?

No. You can enter both lifts or only the final competition total. The score is based on the total used in the calculation.

3) Which bodyweight should I enter?

Use the official weigh-in bodyweight for competition analysis. For training comparisons, use the bodyweight measured closest to the lifting session.

4) Why is the coefficient higher for lighter lifters?

The system is designed to normalize totals across bodyweights. Lighter athletes receive larger coefficients so performances can be compared more fairly.

5) What happens when bodyweight exceeds b?

The coefficient becomes 1. That means the Sinclair score equals the raw total because no additional bodyweight adjustment is applied.

6) Can I use pounds instead of kilograms?

Yes. Select pounds in the unit menu. The calculator converts your entries to kilograms internally before applying the formula.

7) Is this score only for competitions?

No. It is also useful for training logs, club rankings, mock meets, and comparing lifters who train at different bodyweights.

8) Why export CSV or PDF results?

Exports help you save meet summaries, share comparisons with coaches, archive athlete progress, and keep consistent records outside the calculator.