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Exercises

Dumbbell bench press: how to do it and how heavy to go

Published October 19, 2026

The dumbbell bench press is a chest press lying on a flat bench holding two dumbbells. Kick the bells up from your knees, press them over your chest, then lower until they sit just outside your chest with your elbows tucked partway toward your sides. Press back up and in. Each arm works on its own, so you get more range and fewer imbalances than with a bar.

Your last flat dumbbell press set

How to do the flat dumbbell press

Two separate weights let each arm find its own path and lower a little deeper than a bar allows, and a weak side cannot hide behind the strong one. It is one of the best chest builders you can do with only a bench and dumbbells, and dropping the weights is safe if you fail a rep.

Steps

  1. Sit on the end of a flat bench with the dumbbells standing on your thighs, then lie back and use your knees to help them up to your chest as your back reaches the bench.
  2. Plant your feet, squeeze your shoulder blades back and down, and press the bells up until they sit over your chest with your palms facing your feet.
  3. Lower the dumbbells under control, letting your elbows travel down and out at roughly a 45-degree angle from your torso.
  4. Stop when the handles reach chest level and you feel a stretch across the chest, with your forearms vertical.
  5. Press back up, bringing the bells slightly toward each other at the top without clanking them together.

Cues

  • Shoulder blades pinned
  • Forearms vertical
  • Press up and in

Common mistakes

  • Flaring the elbows straight out to the sides: tuck them partway so your upper arms point a little toward your hips.
  • Losing the shoulder-blade squeeze at the top: stop the press just short of shrugging forward.
  • Picking up dumbbells you cannot get into position: if the kick-up is a struggle, the set will be too; go lighter.

Swap for: Barbell Bench Press, Incline Dumbbell Press, Push-Up

Muscles the flat dumbbell press works

The dumbbell bench press works your chest (pectoralis major), the front of your shoulders and your triceps. Because each hand moves on its own, the muscles that keep the shoulder steady work harder than on a barbell press, and the deeper bottom position stretches the chest more.

Sets, reps and reps in reserve for the flat dumbbell press

GoalSets × repsRIRRest
Build muscle 3–4 × 8–12 1–2 2 min
Go up a pair of dumbbells once you hit 12 reps on every set at the target RIR.
Build strength 4 × 5–8 2 2–3 min
Heavier sets need a solid kick-up and a spotter or safe dump if you miss.
Home or lighter dumbbells 3 × 12–20 0–1 90 s
With fixed dumbbells, add reps and slow the lowering before moving up.

Flat dumbbell press variations

  • Alternating Dumbbell Bench Press start position

    Alternating Dumbbell Bench Press

    Press one arm while the other holds at the top when you want more time under tension with the same pair.

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  • Dumbbell Floor Press start position

    Dumbbell Floor Press

    Press from the floor when you have no bench or want a shorter range that is kinder to the shoulders.

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  • Dumbbell Hex Press start position

    Dumbbell Hex Press

    Squeeze the bells together and press when you want more inner-chest tension with lighter weights.

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  • Decline Dumbbell Press start position

    Decline Dumbbell Press

    Set a slight decline when you want to bias the lower chest.

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Flat dumbbell press alternatives

Barbell and machine presses

  • Barbell Bench Press start position

    Barbell Bench Press

    Use a barbell when you want to load the press heavier in small jumps.

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  • Machine Chest Press start position

    Machine Chest Press

    Use a machine when you want to push close to failure without balancing anything.

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Angles and no equipment

Dumbbell bench press vs barbell bench press

Both build the chest well. The barbell lets you lift more total weight and add load in small steps, which is why it is the usual strength test. Dumbbells give a deeper stretch, let your wrists and elbows settle where they are comfortable, and make each side pull its own weight.

Most people press about 70 to 80 percent of their barbell bench as a combined dumbbell weight, because balancing two bells costs some force. Use whichever fits your gear and shoulders, or do both on different days.

How heavy should your dumbbells be?

Pick a pair you can press for your target reps with one or two reps left in the tank. If you can do more than the top of your range at that RIR, move up a pair. A number like 70 lb per hand is a strong press for many trained lifters, but the right weight is the one that hits your reps and RIR, not someone else's. With light home dumbbells, higher reps close to failure still build muscle.

Questions

What muscles does the dumbbell bench press work?

The chest, the front deltoids and the triceps, with the small shoulder stabilizers working harder than on a barbell press.

Is the dumbbell bench press as good as the barbell bench press?

For building the chest, yes. Dumbbells give more range and even out the sides; the barbell lets you lift heavier and progress in smaller steps.

Are dumbbells and a bench enough to build a chest?

Yes. Flat and incline dumbbell presses plus a fly cover the chest well, as long as you train close to failure and add reps or weight over time.

Is a 70 lb dumbbell bench press good?

Pressing a pair of 70s for clean reps is strong for most lifters. Compare against your own last session, not a chart.

Are 20 lb dumbbells enough to build muscle?

For beginners and for higher-rep sets, yes, if you take sets close to failure. Once 20 to 25 reps are easy, slow the reps down or move to heavier dumbbells.

How far should you lower the dumbbells?

Until the handles are about level with your chest and you feel a stretch, without your shoulders rolling forward.

Should the dumbbells touch at the top?

No need. Bring them close over your chest; clanking them adds nothing and can pull your shoulders out of position.