🏋 Barbell Calculator
BUILT BY COACH J · OLYMPIAN · 3X HALL OF FAME
Estimate Your 1RM · Find Your Working Weight · Load The Bar
🏋 Step 1 — Find Your 1-Rep Max
Lift
Units
Weight LiftedTotal weight on bar (bar included — Olympic = 45 lbs).
Reps Completed1-12 reps. Best accuracy: 2-6 reps.
Enter valid weight and reps (1-12).
Estimated 1-Rep Max
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POUNDS
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POUNDS
FormulaEPLEY
Lift—
Accuracy—
💪 Step 2 — Working Weight
Lift
Units
Your 1-Rep MaxAuto-filled from Step 1. Or type your known max.
Prescribed %
Enter a valid 1RM.
Load The Bar With
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POUNDS
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POUNDS
Rep Range—
Training Zone—
Lift—
🏋 How to Load the Bar
Largest plates closest to center. Smallest on outside. Same on both sides.
📊 Full % Chart
Coach J’s Note“Track athletes don’t max out for fun. We use lighter sets to figure out the limit, then train at the percentage that builds what the event needs. Smart loading beats heavy loading every time.”
Training Zones
Strength (85-100% / 1-6 reps): Pure max force production. Heavy. Long rest.
Power (75-85% / 3-6 reps): Force × velocity. The sweet spot for sprinters and jumpers.
Hypertrophy (65-80% / 8-12 reps): Muscle growth. Off-season blocks.
Endurance (50-65% / 15+ reps): Work capacity. Used sparingly for track athletes.
The math (Epley): 1RM = weight × (1 + reps/30). Working weight = 1RM × (% / 100).