About the Sinclair Calculator
This Sinclair calculator converts an Olympic weightlifting total into a Sinclair total — the number the International Weightlifting Federation (IWF) and most national federations use to pick the best lifter across bodyweight categories. Enter your sex, bodyweight and your best snatch and clean & jerk, in kilograms or pounds.
The Sinclair total answers the question "what would this lifter total if they were in the heaviest class with the same level of ability?". It is used for best-lifter awards at club and national meets, for team scoring, and by coaches tracking progress while an athlete's bodyweight changes.
The IWF recalculates the coefficients for each Olympic cycle. This calculator uses the 2021–2024 cycle constants (men A = 0.722762521, b = 193.609 kg; women A = 0.787004341, b = 153.757 kg), the latest set we could confirm. A newer set for the 2025–2028 cycle changes coefficients by a few percent, so if your meet scores with it, results will differ slightly. Totals scored with different cycles' constants are not directly comparable.
With the default inputs, the sinclair total is 342.67. Change any value above to recalculate instantly.
How to use the sinclair calculator
- 1Select your sex and whether you are entering kilograms or pounds.
- 2Enter your bodyweight (weigh-in weight for a competition).
- 3Enter your best snatch and best clean & jerk.
- 4Read your Sinclair total and coefficient.
- 5Use the table to see what total would score the same at other bodyweights.
Formula and method
The Sinclair coefficient is derived statistically from world-record totals across bodyweight categories. BW is the lifter's bodyweight in kilograms, b is the reference bodyweight of the heaviest category and A is a fitted constant. Lifters lighter than b get a coefficient above 1 that scales their total up to what it would be worth in the heaviest class; lifters at or above b use a coefficient of exactly 1.
The IWF recalculates A and b every Olympic cycle. This calculator uses the 2021–2024 values: men A = 0.722762521, b = 193.609 kg and women A = 0.787004341, b = 153.757 kg. Pound entries are converted at 2.20462 lb per kg. The bodyweight table uses the IWF categories introduced in 2025.
- BW
- Bodyweight in kilograms
- A
- Cycle-specific constant (sex-specific)
- b
- Reference bodyweight of the heaviest class, kg
- Total
- Best snatch + best clean & jerk, kg
Worked examples
81 kg man, 120 kg snatch and 150 kg clean & jerk
log₁₀(81 ÷ 193.609) = −0.3784, squared and multiplied by 0.722762521 gives 0.10351, and 10^0.10352 = 1.269147. The 270 kg total becomes a Sinclair total of about 342.67.
64 kg woman, 85 kg snatch and 105 kg clean & jerk
With the women's constants the coefficient at 64 kg is 1.300276, so the 190 kg total is worth about 247.05 Sinclair points, and the snatch alone about 110.5.
160 kg woman above the reference bodyweight
160 kg is heavier than the women's reference of 153.757 kg, so the coefficient is capped at 1 and the Sinclair total equals the actual 250 kg total.
180 lb lifter totalling 570 lb
180 lb is 81.65 kg and the 570 lb total is 258.55 kg. The men's coefficient at 81.65 kg is 1.263664, so the Sinclair total is about 326.7.
Frequently asked questions
What is a good Sinclair total?+
As a rough guide only: elite international men typically score above 400 and elite women above 280 to 300 under recent coefficients, while recreational lifters are often in the 150–250 range. Compare within the same cycle's coefficients.
Why did my Sinclair score change when the cycle changed?+
The IWF recalculates the A and b constants every Olympic cycle from recent world records. A higher reference bodyweight b raises every lighter lifter's coefficient, so the same total can score differently from one cycle to the next.
Is the coefficient ever below 1?+
No. The coefficient is exactly 1 at or above the reference bodyweight b and rises above 1 for lighter lifters. Heavy lifters never have their totals scaled down.
What is the Sinclair-Meltzer-Faber (SMF) score?+
SMF multiplies the Sinclair total by an age factor so masters lifters (35+) can be compared with each other. This calculator gives the Sinclair total only; apply your federation's masters age table separately.
Can I use the Sinclair for one lift?+
Yes. Multiplying a single snatch or clean & jerk by the coefficient is a common informal comparison, which is why the calculator also shows a Sinclair snatch and Sinclair clean & jerk.