Sinclair Calculator
Calculate a bodyweight-adjusted Olympic weightlifting total. Choose a coefficient edition, enter your bodyweight, and use either your total or your snatch and clean & jerk.
- Sinclair coefficient
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- Actual total
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- Bodyweight
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- Coefficient edition
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Pound inputs are converted to kilograms. The Sinclair result keeps the same kg-based scale when you switch units.
The interactive calculator requires JavaScript. The formula, constants, worked examples, reference tables and downloads are available below.
Your total under each edition
Same bodyweight, coefficient category and actual total; only the edition changes.
| Edition | Coefficient | Sinclair total |
|---|
What is a Sinclair total?
A Sinclair total is an Olympic weightlifting total multiplied by a bodyweight coefficient. The actual total is your best successful snatch plus your best successful clean & jerk. A competition total requires a successful result in both lifts; a training estimate should be described as a training estimate.
The coefficient is evaluated from bodyweight, not from a weight-class label. Use the same coefficient edition and category when comparing performances.
Sinclair formula
Let x be bodyweight in kilograms, T the actual total in kilograms, and A and b the selected constants.
C = 10^(A × [log10(x / b)]²), for 0 < x < b
C = 1, for x ≥ b; Sinclair total = T × C
The reference weight b is a formula parameter, not the upper limit of a weight class. The coefficient is dimensionless. This page reports the adjusted total on a kilogram-based scale, often called Sinclair points.
Units and rounding
One pound is exactly 0.45359237 kg. Bodyweight and lifts entered in pounds are converted before applying the formula. Calculations use unrounded coefficients; the result is displayed to two decimal places and the coefficient to six. Intermediate values shown in examples and tables are rounded for readability.
Sinclair constants by edition
These numerical sets are transcribed from the linked, versioned OWLCMS coefficient files. They are reference editions, not a statement that every federation or competition uses Sinclair. The default is the 2025–2028 set identified by that source.
| Edition | Men: A | Men: b (kg) | Women: A | Women: b (kg) |
|---|---|---|---|---|
| 2017–2020 | 0.751945030 | 175.508 | 0.783497476 | 153.655 |
| 2021–2024 | 0.722762521 | 193.609 | 0.787004341 | 153.757 |
| 2025–2028 | 0.700767819 | 201.159 | 0.674107991 | 163.918 |
Worked Sinclair examples
These are illustrative inputs, not athlete records. Both examples use the 2025–2028 coefficients. Intermediate values below are rounded for reading; the final total is calculated from the unrounded coefficient.
Men: 68 kg bodyweight, 155 kg total
- Use A = 0.700767819 and b = 201.159 kg.
- log10(68 / 201.159) = -0.471030555.
- Coefficient = 10^(0.700767819 × [-0.471030555]²) = 1.430471484.
- Sinclair total = 155 × unrounded coefficient = 221.72.
Women: 64 kg bodyweight, 160 kg total
- Use A = 0.674107991 and b = 163.918 kg.
- log10(64 / 163.918) = -0.408446673.
- Coefficient = 10^(0.674107991 × [-0.408446673]²) = 1.295569004.
- Sinclair total = 160 × unrounded coefficient = 207.29.
Boundary example: in the 2025–2028 men’s set, a bodyweight of 201.159 kg or more gives a coefficient of exactly 1. A 230 kg total therefore gives a Sinclair total of 230.00.
How the edition changes the result
Hold the inputs constant and change only the coefficient set. The same performance can produce different scores. This comparison does not reconstruct historical competition results or establish an all-time ranking.
| Edition | Men: 68 kg, 155 kg total | Women: 64 kg, 160 kg total |
|---|---|---|
| 2017–2020 | 207.89 | 207.72 |
| 2021–2024 | 218.56 | 208.04 |
| 2025–2028 | 221.72 | 207.29 |
Sinclair coefficient lookup tables
These tables are calculated from the formula, not transcriptions of official printed lookup charts. Bodyweights are shown every 10 kg; the downloadable CSV covers 40–250 kg in 0.5 kg steps for both coefficient categories and all three editions. The calculator evaluates your entered bodyweight directly, so it does not interpolate between table rows.
2025–2028 coefficient table
| Bodyweight (kg) | Men | Women |
|---|---|---|
| 40 | 2.212225 | 1.790403 |
| 50 | 1.803573 | 1.510938 |
| 60 | 1.561115 | 1.344079 |
| 70 | 1.403716 | 1.236091 |
| 80 | 1.295314 | 1.162587 |
| 90 | 1.217586 | 1.110975 |
| 100 | 1.160289 | 1.074119 |
| 110 | 1.117268 | 1.047683 |
| 120 | 1.084612 | 1.028885 |
| 130 | 1.059718 | 1.015859 |
| 140 | 1.040792 | 1.007310 |
| 150 | 1.026556 | 1.002308 |
| 160 | 1.016077 | 1.000171 |
| 170 | 1.008657 | 1.000000 |
| 180 | 1.003766 | 1.000000 |
| 190 | 1.000992 | 1.000000 |
| 200 | 1.000010 | 1.000000 |
| 210 | 1.000000 | 1.000000 |
2021–2024 coefficient table
| Bodyweight (kg) | Men | Women |
|---|---|---|
| 40 | 2.182756 | 1.858341 |
| 50 | 1.777678 | 1.539276 |
| 60 | 1.538466 | 1.353466 |
| 70 | 1.383858 | 1.235690 |
| 80 | 1.277863 | 1.157078 |
| 90 | 1.202248 | 1.103002 |
| 100 | 1.146839 | 1.065301 |
| 110 | 1.105536 | 1.039077 |
| 120 | 1.074466 | 1.021224 |
| 130 | 1.051059 | 1.009675 |
| 140 | 1.033542 | 1.003007 |
| 150 | 1.020654 | 1.000209 |
| 160 | 1.011477 | 1.000000 |
| 170 | 1.005322 | 1.000000 |
| 180 | 1.001669 | 1.000000 |
| 190 | 1.000111 | 1.000000 |
| 200 | 1.000000 | 1.000000 |
| 210 | 1.000000 | 1.000000 |
2017–2020 coefficient table
| Bodyweight (kg) | Men | Women |
|---|---|---|
| 40 | 2.042460 | 1.852090 |
| 50 | 1.673457 | 1.535542 |
| 60 | 1.456772 | 1.351068 |
| 70 | 1.317740 | 1.234087 |
| 80 | 1.223328 | 1.155985 |
| 90 | 1.156811 | 1.102254 |
| 100 | 1.108860 | 1.064794 |
| 110 | 1.073885 | 1.038743 |
| 120 | 1.048336 | 1.021014 |
| 130 | 1.029857 | 1.009555 |
| 140 | 1.016826 | 1.002952 |
| 150 | 1.008087 | 1.000197 |
| 160 | 1.002799 | 1.000000 |
| 170 | 1.000332 | 1.000000 |
| 180 | 1.000000 | 1.000000 |
| 190 | 1.000000 | 1.000000 |
| 200 | 1.000000 | 1.000000 |
| 210 | 1.000000 | 1.000000 |
The CSV is a generated reference grid, not a dataset of lifters. It has 2,526 rows: 421 bodyweights × two categories × three editions. Its 40–250 kg range is a sampling choice, not an eligibility limit or a validation range for the model.
Sources and review notes
Coefficient values checked on October 20, 2026. Numerical source files are pinned to a specific OWLCMS revision so the data can be checked again even if the project changes. The formulas, examples and lookup tables on this page are calculated by The Gym Calculator.
- OWLCMS 2017–2020 coefficient file — source of the A and b constants shown above.
- OWLCMS 2021–2024 coefficient file — source of the A and b constants shown above.
- OWLCMS 2025–2028 coefficient file — source of the A and b constants shown above.
- IWF Sinclair reference and IWF 2021 coefficient publication — primary-reference links; these documents could not be independently retrieved during this review.
- Sinclair’s research publication record — further reading on normalization in Olympic weightlifting.
For citation: The Gym Calculator, “Sinclair Calculator: Formula, Coefficients & Tables,” coefficient data version 1.0.0, October 20, 2026. Cite the chosen edition and the relevant table or example anchor. This page does not claim federation endorsement or independent expert review.
What this score can and cannot tell you
Sinclair is a normalization model. It is not a population percentile, an experience-level classification, or a prediction of what you would actually lift after gaining bodyweight. No beginner, elite or world-class score thresholds are invented here.
This calculator does not apply Masters age factors. Age-adjusted scoring needs a separately identified age-factor system. Sinclair, Robi and Q-points are distinct systems; check the rules for the event rather than assuming its best-lifter award uses Sinclair. Ordinary Olympic weightlifting medals are not determined by this calculator.
The historical tables compare formulas on identical illustrative inputs. They do not establish all-time records, prove a model is unbiased, or reproduce a past event’s awards. Such claims would require official results, actual weigh-in bodyweights and the relevant event rules.