Divide a comparable three-lift total by bodyweight expressed in the same unit. Keep numerator and denominator visible: the ratio can rise because the total increased, because bodyweight fell, or because both changed.
Use the same unit on both sides
The formula is relative-strength ratio = squat-plus-bench-plus-deadlift total ÷ bodyweight. For a 450 kg total at 90 kg bodyweight, 450 ÷ 90 = 5.00. You can describe that as a total equal to five times bodyweight. This does not mean that any single lift was five times bodyweight, or that the total measured the strength of every movement.
The kilograms cancel because both quantities use kilograms. Pounds cancel in the same way. A 990 lb total at 198 lb bodyweight also produces 5.00. This second pair is its own example; it is not an exact conversion of 450 kg and 90 kg. Changing the unit correctly should leave a ratio unchanged.
Correct a mixed-unit calculation
Suppose your total is 1,000 lb and your bodyweight is 90 kg. Dividing 1,000 by 90 gives 11.11, but that number combines pounds and kilograms. Convert the total first. NIST defines 1 lb as exactly 0.45359237 kg, so 1,000 lb is 453.59237 kg. Then 453.59237 ÷ 90 gives approximately 5.04.
Alternatively, 90 kg converts to approximately 198.416 lb, and 1,000 ÷ 198.416 gives the same ratio after rounding. Keep full precision through the conversion and round the final ratio to a useful display, such as two decimal places. Write both units on the input row so an accidental mixed-unit result is easy to catch.
Sources: NIST Guide to the SI, footnote 22
Define what your total represents
A ratio based on a completed meet total answers a different question from a ratio based on gym bests recorded across several months. A total constructed from estimated maxima is another category. Label the numerator before comparing results. A formula estimate may be useful for tracking, but it does not turn a rep set into a completed single.
For personal comparisons, keep squat depth, bench pause, deadlift completion, and equipment conventions consistent. If one entry uses straps and another does not, retain that distinction. Comparing a new gym estimate with an old meet result may show a large apparent improvement that partly comes from changing the measurement rather than lifting more under the same conditions.
Record the bodyweight context
For an official competition comparison, use the bodyweight recorded for that competition and identify the meet. For your own gym log, record the measurement date, scale, and a consistent measurement routine. Avoid pairing today's bodyweight with a much older total without labeling the mismatch. Both numbers need context, not just a mathematically valid division.
Small measurement differences can change the displayed ratio without changing the lifts. For the same 450 kg total, dividing by 89 kg gives approximately 5.06, while dividing by 90 kg gives 5.00. That is a denominator change. It does not demonstrate that the lifter added strength, and it is not a reason to pursue a lower bodyweight.
Interpret total and ratio together
| Example | Total | Bodyweight | Ratio | What changed |
|---|---|---|---|---|
| Baseline | 450 kg | 90 kg | 5.00 | Starting record |
| A | 465 kg | 93 kg | 5.00 | Total and bodyweight both increased |
| B | 450 kg | 85 kg | 5.29 | Ratio increased with the same total |
| C | 440 kg | 85 kg | 5.18 | Ratio increased despite a lower total |
| D | 465 kg | 90 kg | 5.17 | Total increased at the same bodyweight |
Example A has 15 kg more in the total without a higher ratio. Example C has a higher ratio despite 10 kg less in the total. Neither fact should be hidden by choosing the more flattering column. If your goal is a 1,000 lb total, the absolute total determines the remaining load gap; the ratio supplies additional descriptive context.
These examples are arithmetic scenarios, not recommendations to change bodyweight. They show why reporting only a ratio can give a misleading impression of progress. Record total, bodyweight, ratio, and measurement type together.
Do not treat the ratio as IPF GL points
The IPF publishes a separate IPF GL scoring formula and coefficient resources for comparing competition performances. A simple total-to-bodyweight division does not reproduce that system. Use the federation's current scoring resources and the appropriate event inputs when the question is an official points comparison.
The same ratio also does not establish a strength percentile or a universal beginner, intermediate, or advanced category. Such claims would require a defined comparison population, valid records, and a stated method. An unlabeled internet chart does not supply that evidence. For two individual logs, first check units, lift standards, equipment, and timing before interpreting the numbers.
Make a ratio entry you can reuse
- Name the record type: meet total, comparable gym bests, or estimated total.
- Add the three lift values using a single unit.
- Record the relevant bodyweight and its measurement date.
- Convert one input if the units differ, then divide total by bodyweight.
- Display the absolute total beside the rounded ratio.
- Explain whether a later change came from the lifts, bodyweight, or both.
A practical entry is 'gym bests, 450 kg total, 90 kg bodyweight measured this week, 5.00 ratio, paused bench and consistent squat standard.' The club calculator can help check the three-lift sum. Keep the ratio as an additional column so it enriches the record rather than replacing the actual performance you want to improve.
Sources and scope
These references support the specific factual points cited above. The examples and decision aids are original illustrations, not individualized coaching or medical advice.
- NIST Guide to the SI, footnote 22
Exact avoirdupois pound-to-kilogram conversion; checked October 6, 2026. Ratio examples are original calculations.
- IPF GL formula and coefficient resources
Supports the distinction between IPF GL competition scoring and simple division by bodyweight; checked October 6, 2026. No coefficient calculations or percentile claims are made here.
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