1RM Calculator

Estimate your one-rep max from a lighter set, with a %1RM chart and strength grade.

Estimate your one-rep max (1RM) from a lighter set — enter the weight you lifted and how many reps you got. We combine the Epley and Brzycki formulas and show a %1RM training chart plus a strength-level grade scaled to your bodyweight.

Lift

Weight lifted (kg)

Reps completed

Sex

Bodyweight (kg)

Estimated 1RM (average)

114.6kg

Epley 116.7 kg · Brzycki 112.5 kg — the average is the headline estimate.

Epley formula: 116.7 kg
Brzycki formula: 112.5 kg
Average (recommended): 114.6 kg

%1RM training chart

% of 1RM	Weight	Typical reps
100%	114.6 kg	~1 reps
95%	108.9 kg	~2 reps
90%	103.1 kg	~4 reps
85%	97.4 kg	~6 reps
80%	91.7 kg	~8 reps
75%	85.9 kg	~10 reps
70%	80.2 kg	~12 reps
65%	74.5 kg	~15 reps
60%	68.8 kg	~18 reps

Strength level

Your estimated 1RM is 1.53× your bodyweight — Intermediate level.

Beginner: 0.75× · 56.3 kg
Novice: 1.25× · 93.8 kg
Intermediate · You: 1.50× · 112.5 kg
Advanced: 2.00× · 150 kg
Elite: 2.50× · 187.5 kg

Standards are relative to bodyweight, sex and lift. They're approximate references, not official ratings.

⚠️ This is an estimate only. Do NOT attempt an actual 1RM lift to verify it — max singles carry a real injury risk. Test with a spotter and proper progression.

Estimated with the Epley and Brzycki formulas; accuracy drops above ~10 reps. Not medical or training advice.

About This Content

The 1RM Calculator estimates your one-rep max (1RM) from the weight and reps you lifted, using the Epley and Brzycki formulas. It calculates 1RM for squat, bench press, deadlift and overhead press, and shows a %1RM training chart plus a bodyweight-scaled strength grade (beginner to elite). Actually attempting a true 1RM carries injury risk, so use this as an estimate only. Pairs well with the TDEE, body-fat and macro calculators.