StairMaster vs Treadmill: Which Should You Buy?

StairMaster is a brand name, so this guide says stair climber or stepmill for the machine type. WorkoutHealthy sells the treadmills named here and does not currently carry a stepmill.

Direct answer: For most home buyers, a treadmill is a better buy than a StairMaster. It costs less and fits under more ceilings, and with a steep incline it comes close to a stair climber's effort, while a 6 mph run matches it.

Choose a stepmill if you want the most work per minute at a walking pace, your knees handle stairs well, and your room has the height. This comparison uses published MET values from the 2024 Adult Compendium and specs from our own product pages.

StairMaster vs Treadmill: The Quick Verdict

The treadmill wins for most buyers because it does more jobs, needs less height and costs less. The stair climber wins for people who want hard, low speed climbing in short sessions and have the room for it.

• Best overall for a home gym: a treadmill. It walks, runs and climbs an incline, and our Endurance T150 runs roughly $4,000 to $4,400.
• Best for hard work at a walking pace: a stepmill, listed at 9.3 MET at general effort, about twice the 4.8 MET of a brisk walk on a flat treadmill.
• Best on a tighter budget: a treadmill, since WorkoutHealthy's review of current commercial listings puts stepmills at roughly $4,900 to $14,700.
• Best for low ceilings: a treadmill, because on a stepmill you stand well above the floor.
• Skip both if stairs and incline walking both bother your knees or hips. A seated machine may suit you better, and our cardio machine buying guide compares them.

StairMaster vs Treadmill: Key Differences at a Glance

The StairMaster 8Gx dimensions and power figures above come from its current specifications. The price range comes from WorkoutHealthy's review of current commercial listings, since WorkoutHealthy has no active stepmill right now.

How a Stair Climber and a Treadmill Work Your Body Differently

A stair climber makes you lift your body weight onto the next step, over and over. A treadmill moves the ground under you, so your effort depends on the speed and incline you choose.

Both train the big muscles of the hips and legs, including the glutes, quads, hamstrings and calves. The difference is that every stair step is a step up, while a flat treadmill walk takes far less effort until you add incline or speed.

At a walking pace, one foot is always down on either machine. Running on a treadmill adds a moment when both feet leave the belt, and the landing after it is where running impact comes from.

Which Burns More Calories: StairMaster or Treadmill?

At a walking pace, the stair climber burns more per minute. The 2024 Adult Compendium lists a stair treadmill at 9.3 MET at general effort, compared with 4.8 MET for a brisk 3.5 to 3.9 mph walk on a flat treadmill.

The treadmill closes the gap with speed or incline. A 6.0 to 6.3 mph run is listed at 9.3 MET, the same as the stair climber, and an uphill run at 4.5 mph and a 5 percent grade is listed at 10.3 MET.

A MET is a multiple of the energy you use at rest, so 9.3 MET means about 9.3 times your resting rate. Your real calories depend on your body weight, your fitness and how hard you actually work.

Winner: the stair climber at walking speeds, and a tie once you run or climb a steep incline on the treadmill. Neither machine guarantees weight loss, which depends on your whole routine over time.

Which Is Easier on Your Knees?

Level walking on a treadmill produced lower patellofemoral contact demands than stair climbing in the laboratory model used by a 2009 study. That result describes the tested movement, not how any individual knee will feel.

That finding helps explain why people tolerate stairs so differently, but it does not predict pain for any one person. If you have knee pain or an injury, ask a doctor or physical therapist which machine and settings fit you.

Winner: the treadmill at a walking pace because you can control the speed and keep the belt flat. The T150 starts at 0.5 mph.

Which Fits Better in a Home?

The treadmill fits more homes, mainly because of height. On a stepmill you stand well above the floor, so your head ends up much closer to the ceiling.

The current StairMaster 8Gx manufacturer specification recommends a 10 ft ceiling. The machine is 79 in tall with a 9 in step-up height, so use that recommendation instead of estimating from the frame height alone.

The T150's deck sits several inches off the floor, far lower than a stepmill's top step. Still, measure from the belt surface, because a 15 percent incline raises the front of the deck even higher.

On floor space alone, the stepmill wins. The T150 is 82 x 35 in and Body-Solid asks for 4 ft of open space behind it and on each side, while the current StairMaster 8Gx is 58 x 34 in.

Power requirements are not equivalent. The T150 needs a dedicated 20 amp circuit with a NEMA 5-20 outlet, while the current StairMaster 8Gx uses a 12V / 5A power supply.

Winner: the treadmill for most rooms because of ceiling height, unless floor space is your only limit.

Which Costs Less to Own?

The treadmill costs less up front. Our T150 runs roughly $4,000 to $4,400, while current commercial stepmill listings run roughly $4,900 to $14,700.

It also covers more kinds of training for that money, from slow walks to incline hikes to runs. In a home, the T150's warranty covers the frame for life, parts for 5 years, electronics for 2 years, wear items for 6 months and labor for 1 year.

Plan for upkeep either way. Body-Solid recommends silicone belt lubricant on the T150 every 3,000 miles, and WorkoutHealthy does not stock that lubricant.

Winner: the treadmill.

WorkoutHealthy Analysis: Treadmill Minutes That Match 30 Minutes on a Stair Climber

If you buy a treadmill instead of a stepmill, how long do you need to walk or run to do the same work? We answered that with the MET values in the 2024 Adult Compendium.

The formula is short: treadmill minutes equal 9.3 times 30, divided by the MET value of your treadmill setting. Body weight drops out of the math, because both machines scale your calories by your weight in the same way.

What the table shows: a flat walk needs about twice the time to match a stair climber. Add a steep incline or a jog, and the treadmill matches it almost minute for minute.

The decision rule: if you will only ever walk flat and your sessions are short, a stair climber does more with your time. If you will use incline or jog, the treadmill gives you the same work plus a wider range of training.

Limits: Compendium values are averages from published research, and the stair value is for general effort, not an all out climb. Your own numbers will differ, so treat this as a planning guide, not a calorie count.

Who Should Choose a StairMaster and Who Should Choose a Treadmill?

Choose a stair climber if:

• Your main goal is climbing fitness, such as training for hikes or stair events.
• You want hard work in short sessions without running.
• Your ceiling clears your tallest user plus the machine's top step, with headroom to spare.
• Stairs feel fine on your knees.

Choose a treadmill if:

• You want to walk, hike an incline and run on one machine.
• More than one person with different goals will use it.
• Your room has a standard ceiling or a low basement ceiling.
• You want to start slow, since the T150 begins at 0.5 mph.

Choose neither if both climbing and incline walking bother your joints. Our rowing machine vs StairMaster comparison covers a seated option.

StairMaster vs Treadmill: Pros and Cons

Stair climber

• Pro: Hard work at a walking pace, listed at 9.3 MET at general effort.
• Pro: One foot is always on a step, so there is no running style landing.
• Con: Needs more ceiling height than a treadmill.
• Con: Costs more, with current commercial listings at roughly $4,900 to $14,700.
• Con: Trains one pattern, and WorkoutHealthy does not carry one right now.

Treadmill

• Pro: Walks, climbs an incline and runs, so one machine covers many goals.
• Pro: A 6 mph run matches a stair climber's published effort, and a steep incline walk comes close.
• Pro: Starts slow, as low as 0.5 mph on the T150.
• Con: A flat walk needs about twice the time to match a stair climber.
• Con: The T150 needs a dedicated 20 amp circuit and does not fold.

Safety, Setup, and Ownership

• Rails: On either machine, use the rails for balance with a light touch, not to hold up your weight.
• Start slow: Begin at a pace you can control, then change one thing at a time: speed, incline or step rate.
• Safety key: The T150 ships with a safety tether and a magnetic key, so clip it on every session.
• Clearance: Leave at least 4 ft behind the T150 and on each side, as Body-Solid asks.
• Outlet: Do not plug the T150 into a GFCI outlet or use an adapter, since Body-Solid says a GFCI will trip with a motor this size.
• Location: We do not recommend the T150 for a garage, outdoors, a poolside or any other humid spot.
• Delivery: The T150 ships in a carton about 85 x 37 x 20 in and weighs 285 lb assembled, and setup takes about one to two hours with two people.

Alternatives to Consider Before You Buy

• Endurance CL300 climber: roughly $1,750 to $1,950, with arm and leg climbing on 16 levels of magnetic resistance. It is not a turning stair machine, and it stands 88 in tall.
• RehabMill: roughly $4,300 to $4,700, for walkers who want a true zero start, speeds from 0.1 mph and a 7.5 in step up.
• PhysioMill: roughly $5,700 to $6,300, rated for users up to 500 lb.
• Stair workouts without buying a stepmill: if your gym has one, our 20 minute StairMaster HIIT workout gives you two exact plans. Our stair climber workouts also include sessions on real stairs.

To compare our three treadmills side by side, see our commercial treadmill buying guide.

WorkoutHealthy does not sell mini steppers or home stair steppers. If you want stair work at home and a commercial stepmill is more than you want to spend, our mini stepper roundup and home stair stepper roundup list models sold on Amazon.

Two picks from those lists are the Sunny Mini Stepper with Bands and the GMWD Stair Stepper Machine. Check the weight limit and size on each listing before you buy.

Frequently Asked Questions

Is 30 minutes on a StairMaster equal to an hour of walking?

It is close for a brisk flat walk. Using 2024 Compendium values, 30 minutes on a stair climber at general effort matches about 58 minutes of walking at 3.5 to 3.9 mph on a flat treadmill.

Can I get a StairMaster workout on a treadmill?

You can match the effort, but not the exact stepping motion. A steep incline walk comes close, and a 6.0 to 6.3 mph run carries the same published MET value as a stair climber at general effort.

Which is better for beginners, a StairMaster or a treadmill?

A treadmill, because you can start at a slow flat walk and add incline later. The T150 starts at 0.5 mph, while a stepmill asks you to lift your body weight on every step from the start.

How much ceiling height does a stepmill need?

The current StairMaster 8Gx recommends a 10 ft ceiling. Follow the specific model's ceiling recommendation and measure the tallest user at the active step position before ordering.

Which is better for weight loss, a StairMaster or a treadmill?

Neither machine guarantees weight loss, which depends on your whole routine over time. Pick the one you will use most often, and use the table above to match your time on either machine.

Does WorkoutHealthy sell a StairMaster?

No, WorkoutHealthy does not currently carry a stepmill. We sell three heavy duty treadmills and the CL300 climber, which uses a different climbing motion.

Final Verdict: Buy a Treadmill for Range, Choose a StairMaster for Climbing

Buy a treadmill if you want one machine for walking, incline and running, a standard ceiling and a lower price. Choose a stepmill only if climbing is the goal, your knees like stairs, and your room clears the top step with headroom to spare.

If you buy the treadmill, use incline or a jog on hard days to get stair climber effort in the same time. Start with our heavy duty treadmills, and check your circuit and ceiling before you order.

References and Data Sources

1. Herrmann, S.D., Willis, E.A., Ainsworth, B.E., et al. "2024 Adult Compendium of Physical Activities: A Third Update of the Energy Costs of Human Activities." Journal of Sport and Health Science, vol. 13, no. 1, 2024, pp. 6 to 12. View the study. Accessed September 2026.
2. Adult Compendium of Physical Activities. Activity code tables for conditioning exercise, walking and running. Accessed September 2026.
3. Goudakos, I.G., König, C., Schöttle, P.B., et al. "Stair Climbing Results in More Challenging Patellofemoral Contact Mechanics and Kinematics Than Walking at Early Knee Flexion Under Physiological-Like Quadriceps Loading." Journal of Biomechanics, vol. 42, no. 15, 2009, pp. 2590 to 2596. View the study. Accessed September 2026.