Dumbbell Shoulder Press 1RM Calculator

Read your shoulder-press weight for each hand

Choose one dumbbell from the each-hand value and keep the seated or standing position unchanged. Use the pair total only for records that count both dumbbells together.

Keep the press position and weight entry consistent

Choose seated or standing dumbbell shoulder press and enter the weight as one dumbbell or the combined equal pair. Keep the bench or back support, grip, unit, and range of motion consistent, then record the completed repetitions and any target or equipment increment.

The primary per-hand value and the pair total follow your selected counting choice. Compare seated and standing histories separately; this page does not convert the result to a barbell press.

Weight unit

Choose the unit shown on your weights.

Weight lifted

Enter the weight used for your completed set, following the weight convention below.

Repetitions completed

Enter 1–10 full repetitions from a hard set with consistent technique.

Repetitions to estimate

Choose how many repetitions you want to estimate a weight for, from 1 to 10.

Percentage of your estimated max

Enter the percentage weight you want to calculate.

Available weight increase

Leave blank for an unrounded estimate, or enter the increase available for one dumbbell, even when entering both dumbbells combined.

Exercise setup

Choose the version you performed. Compare results only with the same version.

How are you counting the weight?

Choose the description that matches the number you entered. Keep this choice the same when comparing results.

Setup notes

Record the seat, grip or stance you want to repeat next time.

Compare targets for your selected shoulder press

The chart keeps the selected shoulder-press position and per-hand or pair-total convention for every point. It compares rep targets within that setup, not seated-versus-standing strength.

The example below shows how to read the graph. Your graph updates after you calculate, and the complete values remain available in the table beneath it.

Follow a dumbbell shoulder-press example

The result uses only the values you enter and the method shown below. Rounded workout values stay separate from the underlying calculation.

A checked dumbbell shoulder press example

This checked example uses pounds. It comes directly from the same calculator that produces your result.

Select “Use example” to load these values. If you choose kilograms in the calculator, the chart and personalized tables recalculate in kilograms.

Use a comparable shoulder-press estimate

Use this as a repeatable estimate, not proof of your true one-rep max. The available study used to check the Brzycki equation tested free-weight bench press in 103 college women. That study checks the equation in that setting; It did not test seated or standing dumbbell shoulder press. Keep seated and standing dumbbell presses separate, and preserve whether the entered weight means one dumbbell or the pair. Use a hard set of 1–10 full repetitions. Stopping early can understate the estimate, and this calculator does not accept higher-repetition sets.

• Strength Testing—Predicting a One-Rep Max from Reps-to-Fatigue — Matt Brzycki (1993).
• Accuracy of Prediction Equations for Determining One Repetition Maximum Bench Press in Women Before and After Resistance Training — Mayhew et al. (2008).
• Guide for the Use of the International System of Units (SI) — NIST (2008).

Choose the matching press standards

• Seated Dumbbell Overhead Press Live Endura

  Explore the listed shoulder-press standards under their own setup rules.

• RPE Calculator

  Add effort context to your completed shoulder-press set.

• Warm-Up Set Calculator

  Build chosen warm-up sets in the same dumbbell convention.

• Dumbbell Bench Press 1RM Calculator

  Track flat dumbbell bench press separately from shoulder pressing.

• Biceps Curl 1RM Calculator

  Record a curl set as a separate dumbbell or barbell exercise.