1RM barbell curl calculator + strength standards
The barbell curl is the benchmark isolation exercise for the biceps and elbow flexors. Unlike the big compound lifts, you almost never test a true 1RM on the curl: a maximal strict single is hard to perform cleanly and invites cheating (hip swing, arched back). Instead, use the calculator to estimate your 1RM from a controlled set. The standards below follow public strength benchmarks (StrengthLevel-style) for a strict barbell curl with elbows pinned to your sides.
📊 Barbell curl strength standards
Men
| Bodyweight | Beginner | Novice | Intermediate | Advanced | Elite |
|---|---|---|---|---|---|
| 60 kg | 12.5 kg | 20 kg | 32.5 kg | 45 kg | 60 kg |
| 70 kg | 15 kg | 25 kg | 37.5 kg | 52.5 kg | 70 kg |
| 80 kg | 15 kg | 27.5 kg | 45 kg | 60 kg | 80 kg |
| 90 kg | 17.5 kg | 32.5 kg | 50 kg | 67.5 kg | 90 kg |
| 100 kg | 20 kg | 35 kg | 55 kg | 75 kg | 100 kg |
| 110 kg | 22.5 kg | 37.5 kg | 60 kg | 82.5 kg | 110 kg |
Women
| Bodyweight | Beginner | Novice | Intermediate | Advanced | Elite |
|---|---|---|---|---|---|
| 50 kg | 5 kg | 10 kg | 15 kg | 22.5 kg | 30 kg |
| 55 kg | 5 kg | 10 kg | 17.5 kg | 25 kg | 32.5 kg |
| 60 kg | 5 kg | 12.5 kg | 17.5 kg | 27.5 kg | 35 kg |
| 70 kg | 7.5 kg | 15 kg | 20 kg | 32.5 kg | 42.5 kg |
| 80 kg | 7.5 kg | 15 kg | 25 kg | 35 kg | 47.5 kg |
Indicative standards based on recognised strength benchmarks (Symmetric Strength / ExRx), for an adult lifter. All values in kilograms (kg).
🎯 Percentage-of-1RM table
Once your 1RM is estimated, multiply it by the percentage on each row to get the working load matching your goal (strength, hypertrophy or endurance).
| % of 1RM | Load (e.g. 1RM = 100 kg) | Use |
|---|---|---|
| 100 % | 100 kg | 1 rep — maximal strength test |
| 95 % | 95 kg | 2 reps — pure strength |
| 90 % | 90 kg | 3-4 reps — strength |
| 85 % | 85 kg | 5-6 reps — strength / heavy hypertrophy |
| 80 % | 80 kg | 6-8 reps — hypertrophy |
| 75 % | 75 kg | 8-10 reps — hypertrophy |
| 70 % | 70 kg | 10-12 reps — hypertrophy / volume |
| 65 % | 65 kg | 12-15 reps — strength endurance |
| 60 % | 60 kg | 15+ reps — muscular endurance |
The "Load" column uses a 1RM of 100 kg as an example: replace 100 with your own 1RM to read your real working loads.
💬 Barbell curl FAQ
What is a good 1RM barbell curl for an 80 kg man?
For an 80 kg man, expect around 16 kg as a beginner, 44 kg at intermediate level (0.55× bodyweight) and 60 kg for the advanced level (0.75×). A ratio approaching 1× bodyweight is an elite isolation level, rarely reached with a strict curl.
Why not just test my 1RM on the curl?
Because a maximal strict single on the barbell curl almost always ends in cheating (swing, arched back), which skews the result and loads the lower back. Estimating from a clean set of 6 to 10 reps is more reliable and safer for the elbows.
Does the EZ bar change the standards?
Slightly. The EZ bar puts the wrists in a semi-neutral position, often more comfortable and sometimes a bit stronger than the straight bar. These standards target the straight bar; allow a few percent difference with the EZ bar.
🔗 Other exercises
← Back to the main 1RM calculatorTurn these numbers into real progress
On Phitnix, a coach builds your cycles from your real loads and the workout log tracks your barbell curl 1RM over time. You know exactly when to add weight, without guessing.
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