Bodyweight-Adjusted Erg Score
Compare a raw erg score with the Concept2 weight-adjusted score. Enter body weight and actual time to see the correction. Keep the raw result for online rankings.
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How does the Concept2 weight adjustment work?
Multiply actual time by (body weight in pounds / 270)^0.222. A 75 kg rower with a 7:00 erg score receives a weight-adjusted score of about 6:16.7. Concept2 uses this model to compare potential on-water performance. Adjusted scores cannot be submitted to its online rankings. The result does not measure technique or crew effectiveness.
Your numbers
Your actual finish time on the erg piece.
Adjusted time
Adjusted split:
Score breakdown
Same time, different weights
How your time would adjust at different body weights, using the canonical Concept2 formula.
| Body weight | Actual time | Adjusted time | Factor |
|---|---|---|---|
How should you use a weight-adjusted score?
The Concept2 weight adjustment multiplies actual time by (body weight in pounds / 270)^0.222. Convert kilograms to pounds before applying the formula. For the same raw erg score, a lighter rower receives a lower adjusted time. The adjustment helps discuss potential boat speed; it does not measure technique or crew effectiveness.
This weight adjustment calculator gives a weight-adjusted score for comparison. Keep the weight-adjusted score beside the original result. Power to weight is a different measure: divide watts by body mass in kilograms. A power to weight ratio describes watts per kilogram; it does not directly predict rowing performance. Neither method captures technique or the crew as a whole.
| Body weight | Weight factor | Adjusted time |
|---|---|---|
| 60 kg | 0.8535 | 5:58.5 |
| 75 kg | 0.8969 | 6:16.7 |
| 90 kg | 0.9339 | 6:32.2 |
Values are illustrative calculations rounded for display. Keep the adjusted score separate from your raw result. Concept2 online rankings accept actual times and distances, not corrected times. A weight-adjusted erg score is not a weight-loss target.
For an additional age comparison, use the erg score calculator and read the limits of its illustrative age factor.
Use the watts to split converter to see the raw power output behind your average split.
Plan sessions from the unadjusted test with the training pace calculator so your targets reflect power you actually produced.
Method and further reading: Concept2 weight adjustment formula and ranking rules
How the adjustment works
The Concept2 weight-adjustment formula
The formula is adjusted_time = actual_time * (body_weight_in_lbs / 270)^0.222. Below 270 lb, the adjusted time is lower than actual time; above 270 lb, it is higher. The reference is part of the model, not a target body weight. The erg score calculator keeps raw and adjusted scores together.
Why 0.222?
The 0.222 exponent is the value published in the Concept2 weight-adjustment formula. It makes the correction smaller than a simple proportional weight ratio. For example, doubling body weight multiplies adjusted time by 2^0.222, about 1.166. It does not imply that changing your body weight will produce that performance change.
When this matters most
A coach can use a weight-adjusted erg score as one comparison within a mixed-weight squad. Keep body weight, raw time and adjusted score in separate fields. Rowing performance also depends on technique and crew combination. Changes in the adjusted score do not isolate fitness from every other factor.
Where the formula breaks down
The model estimates potential on-water performance from erg output and body weight. It is not a direct boat-speed measurement or a selection rule. Crew balance, technique, rigging and conditions remain relevant. Use the same test distance and conditions when comparing results.
The erg score calculator adds a clearly labelled illustrative age adjustment. The 2k pacing guide helps plan a test, and the VO2 max calculator uses a separate model for aerobic capacity.
Frequently asked questions
Can I enter a weight-adjusted score in Concept2 rankings?
No. Concept2 says ranking results must be raw times and distances. Record your weight-adjusted score separately. It answers a different question from your place in a category or season.
What does the 270 lb reference mean?
It is the reference in the published formula for estimating potential speed in an eight. It is not an ideal rower weight. Most rowers weigh less than 270 lb, so their adjusted time is lower than their raw erg time.
Does the formula change for male and female rowers?
The weight correction itself uses body weight and actual time. It has no sex or age input. That does not make it a complete comparison of every athlete. Use the relevant category and actual score when reading online rankings.
How is this different from power to weight?
Power to weight is watts divided by body mass in kilograms. The Concept2 adjustment instead applies a weight ratio raised to 0.222 to the recorded time. Keep the two calculations labelled separately; they produce different units and should not be treated as interchangeable rankings.
What happens to a 75 kg rower with a 7:00 result?
Converting 75 kg to pounds gives about 165.35 lb. The adjustment factor is about 0.8969. Multiplying 420 seconds by that factor gives about 376.7 seconds, or 6:16.7. The original 7:00 remains the score for an official online ranking.
More rowing tools
Erg Score Calculator
Compare raw, weight-adjusted and illustrative age-adjusted scores.
Erg Pace Calculator
Convert split to watts, calories and predicted 2k, 5k, 6k, 10k times.
2k Prediction Calculator
Predict your 2k from a 5k, 6k, 10k or 30-minute test.
Watts to Split Converter
Convert any wattage to a 500m split, or split to watts.
Lightweight or openweight, every score belongs on one list
Row HQ records weight-adjusted and raw erg scores side by side for every athlete in your squad. Coaches at clubs from Vancouver to Ottawa finally have fair rankings across mixed training groups without building their own spreadsheet formulas.