One Rep Max (1RM) Calculator

One rep max calculator delivers accurate 1RM estimates using multiple formulas. Enter lifted weight and reps to get strength ratio, training loads, warm up ramps, fatigue insight, progression limits, and safety guidance designed for real gym decisions across bench squat deadlift and overhead press!

ELITE LEVEL
COMPOSITE 1RM
RATIO: —
NOVICE
01 Immediate Decisions
Verified 1RM
Composite 7-method avg.
Spread
Conf
Today’s Working Wgt
Recommended 3×5 or 5×5.
Load
Sets5×5 (85%)
Next Attempt Target
PR Goal (+2.5-5%).
Add
Load
02 Training Execution
Hypertrophy (8-12)
70-85% 1RM Range.
70%
80%
Strength (3-6)
85-95% 1RM Range.
85%
95%
Speed / Power
50-65% Dynamic Effort.
50%
65%
03 Volume & Fatigue
Est. Rep Maxes
Theoretical failure points.
5RM
10RM
Warm-up Ramp
Plate-loading strategy.
50%
90%
Fatigue Index
Session strain (Vol x Int).
Level
Rec
04 Strength Context
Bodyweight Ratio
Pound-for-pound strength.
Ratio
Target
Lift Tier
Standards for this lift.
Rank
Next
Competition Ready
Against elite standards.
Flag
% Elite
05 Risk & Progression
Safety Advisory
Operational risk check.
Spotter
FormStrict
RPE 8 Load
Training max (~2 RIR).
Load
Int~92%
Progression Ceiling
Max safe increase/week.
Cap
TypeLinear

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