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Bench Press Calculator

Estimate your bench press one-rep max from any weight and rep count.

1RM estimateTraining percentage tableReviewed for accuracy

Uses standard 1RM estimation formulas. Estimate only. Not a substitute for coaching, medical, or professional fitness advice. Avoid testing true maxes without proper setup, warm-ups, and spotting.

Bench press calculator

Use a hard set performed with good technique. Lower-rep sets usually produce more reliable estimates.

Unit system

Enter the loaded bar weight you lifted.

Use a hard set performed with good technique.
1RM estimates are most reliable from lower-rep sets.
Use a spotter or safety arms near maximal loads.

Estimated one-rep max

125

kg

Approximate average based on 8 reps at 100 kg. Not a guarantee of a safe max attempt.

90% training weight

112 kg

Commonly used for heavy lower-rep strength work.

80% / 70%

100 / 87 kg

Useful for strength, volume, or technique-focused work.

Personalized interpretation

Your estimated bench press 1RM is 125 kg based on 8 reps at 100 kg.

For strength work, 80–90% of estimated 1RM is commonly used for lower-rep sets. For technique or volume work, 60–75% may be more appropriate.

Estimates become less reliable at very high rep counts. Use a spotter or safety arms when training near maximal loads.

One-rep max explained

1RM means the maximum weight lifted for one clean rep.
Estimated 1RM uses reps and weight to approximate max strength.
It is useful for programming training percentages.
It is not the same as a guaranteed safe max attempt.

Bench press strength standards

Strength standards can be useful as a general reference, but they are not a judgment of progress or effort.

Bench press performance varies widely based on bodyweight, sex, leverages, training history, technique, injury history, equipment, and experience level.

Compare your lifts mainly against your own previous training, not against unrealistic or out-of-context standards.

Rep max percentage table

95%

118 kg

Near-max strength work

90%

112 kg

Heavy strength sets

85%

106 kg

Strength-focused sets

80%

100 kg

Strength / hypertrophy work

75%

93 kg

Moderate volume work

70%

87 kg

Volume or technique work

65%

81 kg

Speed or lighter volume

60%

75 kg

Warm-up or technique work

How to use estimated 1RM safely

Use estimated 1RM for programming.
Avoid frequent true max testing.
Warm up gradually.
Use spotters or safety arms.
Stop if technique breaks down.
Progress slowly over time.

Formula explanation

Epley: 1RM = Weight × (1 + Reps ÷ 30)
Brzycki: 1RM = Weight × 36 ÷ (37 − Reps)

Weight is the load lifted, and reps are the completed repetitions. These formulas are estimates and are usually more reliable for 1–10 reps than very high-rep sets.

Example: 100 kg × 5 reps

1RM = 100 × (1 + 5 ÷ 30) ≈ 116.7 kg

Example: 185 lb × 8 reps

1RM = 185 × (1 + 8 ÷ 30) ≈ 234 lb

Common mistakes and safety notes

Using sloppy or partial reps
Estimating max from very high reps
Ignoring warm-up sets
Maxing out too often
Training without safety arms or a spotter
Comparing numbers without context
Increasing load too aggressively
This calculator is for training estimates only. It does not assess injury risk or technique. If you feel pain, dizziness, or unusual symptoms while lifting, stop and seek appropriate professional guidance.

Frequently Asked Questions

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