A full soaking tub weighs several times what the empty tub does, because the water outweighs the tub. Filled with a 200-pound bather, Badeloft's 27 stone resin tubs weigh 977 to 1,919 pounds. Below are the numbers for every model, what they mean for your floor, and how to get a 240 to 551 pound tub into the house.
Quick answer
A full Badeloft soaking tub weighs 977 to 1,919 pounds, and 20 of our 27 tubs land between 1,000 and 1,300. That counts the empty tub, its full capacity of water and one 200-pound bather. On a concrete slab the floor is rarely a concern. On a wood-framed floor, and especially upstairs, show the filled weight to your contractor or a structural engineer before you order.
| Part of the load | Across Badeloft's 27 tubs | Example: 72.8-inch BW-01-XL |
|---|---|---|
| Empty tub | 240 to 551 lb | 385 lb |
| Water at full capacity | 517 to 1,168 lb (62 to 140 gal) | 642 lb (77 gal) |
| One bather | 200 lb | 200 lb |
| Filled total | 977 to 1,919 lb | 1,227 lb |
| Load on the tub's footprint | 64 to 128 lb per sq ft | about 74 lb per sq ft |
All tub figures come from Badeloft's 2026 technical data sheets. Footprint is the tub's overall length times its overall width.
What makes up the filled weight
Filled weight is three numbers added together: the empty tub, the water and the person in it. Water weighs about 62.4 pounds per cubic foot in the U.S. Geological Survey's water density table, which works out to 8.34 pounds per gallon. We add one 200-pound bather on every Badeloft page so the numbers compare like for like.
The water is the heaviest part. In all 27 of our tubs it weighs more than the tub, and in the 106-gallon BW-10-XL it weighs about two and a half times as much (884 pounds of water in a 350-pound tub). That is why capacity, not length, decides how heavy a tub gets once it is full.
The filled figure is on the high side on purpose. Few people fill a tub to its full capacity, and when you get in, your body pushes some water out through the overflow, so the load in everyday use is usually a little lower. Planning for the full number leaves a margin.
How much the water weighs
Multiply the gallons by 8.34. A 60-gallon tub holds about 500 pounds of water, an 80-gallon tub about 667, and our largest, the 140-gallon BW-01-XXL, about 1,168. Deeper tubs hold more water for the same length, so they weigh more when full; our deep bathtubs buying guide explains how depth to overflow drives capacity.
Empty weight and material
Our stone resin tubs weigh 240 to 551 pounds empty, and about half weigh 341 pounds or less. Material changes only the shell. The water and the bather weigh the same in any tub of the same capacity, so a lighter acrylic tub saves you the difference in the shell and nothing else. Our comparison of stone resin vs acrylic tubs covers the rest of that trade, and if you are weighing an old-style iron tub, our cast iron bathtub guide has its numbers.
Filled weight for every Badeloft tub
Here is every tub we make, lightest to heaviest when full. The last column divides the filled weight by the tub's footprint, which is the figure to compare with your floor in the next section.
| Model | Length (in) | Capacity (gal) | Empty (lb) | Water (lb) | Filled + 200 lb bather (lb) | Footprint (sq ft) | Load on footprint (lb/sq ft) |
|---|---|---|---|---|---|---|---|
| BW-02-S | 55.1 | 62 | 260 | 517 | 977 | 11.3 | 87 |
| BW-03-M | 62.9 | 66 | 240 | 550 | 990 | 13.8 | 72 |
| BW-01-S | 58.2 | 66 | 277 | 550 | 1,027 | 11.6 | 89 |
| BW-04-L | 59.1 | 63 | 308 | 525 | 1,033 | 12.1 | 85 |
| BW-05-L | 63.0 | 66 | 290 | 550 | 1,040 | 13.8 | 76 |
| BW-06-L | 61.4 | 66 | 308 | 550 | 1,058 | 11.3 | 94 |
| BW-02-L | 66.9 | 72 | 273 | 600 | 1,073 | 12.8 | 84 |
| BW-08 | 61.0 | 64 | 348 | 534 | 1,082 | 13.3 | 81 |
| BW-06-S | 47.2 | 66 | 341 | 550 | 1,091 | 9.0 | 121 |
| BW-05-XL | 70.3 | 72 | 302 | 600 | 1,102 | 17.3 | 64 |
| BW-03-L | 66.9 | 73 | 295 | 609 | 1,104 | 15.6 | 71 |
| BW-02-M | 63.2 | 67 | 357 | 559 | 1,116 | 13.9 | 80 |
| BW-01-L | 66.9 | 72 | 341 | 600 | 1,141 | 15.6 | 73 |
| BW-08-S | 47.2 | 79 | 300 | 659 | 1,159 | 9.0 | 128 |
| BW-07 | 68.9 | 71 | 396 | 592 | 1,188 | 13.7 | 87 |
| BW-03-XL | 71.3 | 80 | 330 | 667 | 1,197 | 17.3 | 69 |
| BW-10-M | 62.9 | 83 | 313 | 692 | 1,205 | 13.4 | 90 |
| BW-01-XL | 72.8 | 77 | 385 | 642 | 1,227 | 16.5 | 74 |
| BW-04-XL | 66.1 | 71 | 462 | 592 | 1,254 | 14.5 | 87 |
| BW-10-L | 66.9 | 88 | 321 | 734 | 1,255 | 14.6 | 86 |
| BW-02-XL | 71.1 | 77 | 436 | 642 | 1,278 | 15.5 | 83 |
| BW-09 | 66.9 | 79 | 420 | 659 | 1,279 | 13.7 | 94 |
| BW-06-XL | 66.9 | 72 | 511 | 600 | 1,311 | 13.1 | 100 |
| BW-10-XL | 70.8 | 106 | 350 | 884 | 1,434 | 15.5 | 93 |
| BW-11 | 68.9 | 89 | 496 | 742 | 1,438 | 17.1 | 84 |
| BW-12 | 66.7 | 110 | 445 | 917 | 1,562 | 14.5 | 108 |
| BW-01-XXL | 74.8 | 140 | 551 | 1,168 | 1,919 | 24.5 | 78 |
Empty weight, capacity and overall dimensions from Badeloft's 2026 technical data sheets. Water at 8.34 pounds per gallon. Filled weight adds one 200-pound bather. Load on footprint is rounded to the nearest pound.
Shorter does not always mean lighter. The 47.2-inch BW-08-S Japanese soaking tub holds 79 gallons and weighs 1,159 pounds full, more than the 66.9-inch BW-01-L at 1,141. By collection, filled with a bather:
- Small soaking tubs under 60 inches: 977 to 1,159 pounds.
- Japanese soaking tubs: 1,091 and 1,159 pounds, on the smallest footprints in the range.
- Extra-long soaking tubs: 1,102 to 1,919 pounds.
- Two-person soaking tubs: 1,197 to 1,919 pounds.
Can your floor hold a full soaking tub?
On a concrete slab, almost always. On a wood-framed floor it depends on the joists, their span and condition, and where the tub sits, and that is a question for a contractor or structural engineer, not a guess. Every Badeloft data sheet says the same thing in its installation notes: "Confirm floor structure supports the filled weight of the bath plus water and occupant."
To see why it matters, compare the tub with the floor's design load. Table R301.5 of the 2021 International Residential Code sets a minimum live load of 40 pounds per square foot for areas other than sleeping areas. Our 72.8-inch BW-01-XL puts 1,227 pounds on about 16.5 square feet, roughly 74 pounds per square foot of footprint. Across our range the figure runs from 64 to 128.
That does not mean the floor fails. Joists spread a tub's load along their length to the walls and beams that hold them up, and plenty of floors carry tubs like these. It means a full tub is a concentrated load the floor was not necessarily designed around, so someone should look at the framing under the spot you have chosen. The two 47-inch upright tubs put the most on each square foot, 121 and 128 pounds, because 66 to 79 gallons of water sit on about 9 square feet.
Is a concrete slab strong enough for a heavy tub?
Yes. A ground floor built on a concrete slab is rarely the question, and the drain is usually the harder part of a slab install. Concrete floors in condos and apartment buildings are different: they are engineered floors that the building controls, so ask the building's management what they require before you buy.
What decides it on an upper floor
Upper floors often carry a full tub, but this is the case to check. What decides it is the size and spacing of the joists, how far they span, whether the tub sits near a bearing wall or out in the middle of the span, and whether old plumbing work notched or cut the joists. A tub replacing an old one in the same spot starts from framing that already carried a tub, though usually a smaller one. Use this table to decide who to call:
| Where the tub goes | What it usually means | What to do |
|---|---|---|
| Ground floor, concrete slab | Weight is rarely the question | Plan the drain and the delivery route instead |
| Ground floor over a basement or crawlspace | Wood joists carry the tub, and you can see them from below | Have your contractor check joist size, span and condition under the tub spot |
| Upstairs, where an old tub stood | The framing already carried a tub, usually a smaller and lighter one | Compare the old and new filled weights, then have your contractor check the framing |
| Upstairs, in a new spot or mid-span | The load lands where the floor was not planned for one | Ask a structural engineer before you order |
| Floor that bounces, sags, or has cracked tile or notched joists | The floor already shows strain | Ask a structural engineer before you order |
| Condo or apartment with concrete floors | An engineered floor the building controls | Ask the building's management what approval or engineering they need |
Reinforcing the floor
A structural engineer sizes the fix for your floor, and the common ones are sistering new joists alongside the old ones, adding solid blocking between joists, or adding a beam or post underneath. All of them happen with the subfloor open, so settle the floor before tile goes down.
Getting the tub into the house
Badeloft tubs ship by LTL freight and arrive curbside with a liftgate, so the tub reaches your driveway and you plan the rest. That means carrying 240 to 551 pounds through the door, along the hall and, for an upstairs bathroom, up the stairs. The NIOSH lifting equation treats 51 pounds as the most nearly all healthy workers should lift even under ideal conditions, so even our lightest tub is a job for a crew with an appliance dolly and lifting straps, not two people.
Our customers say the same in their reviews. From a BW-01-XXL owner: "Caution: this is a very heavy tub. It took 8 guys to get it into the house and placed!" From a BW-09 owner: "We decided to hire a moving company to get the tub up to the second floor which I would recommend if you have similar location."
Then check the width. A tub goes through a door or up a stair on its narrowest side, which for most of our tubs is its height carried on edge.
| Tubs | Narrowest carry width | Through a 30-inch door (about 27.5 to 28 in clear) |
|---|---|---|
| 24 of our 27 tubs, carried on edge | 21.2 to 25.2 in | Clears, with room for hands and padding |
| BW-06-S (47.2 in, upright) | 27.5 in | Very tight: measure, and take the door off its hinges |
| BW-08-S (47.2 in, upright) | 27.6 in | Very tight: measure, and take the door off its hinges |
| BW-12 (31.5-inch backrest) | about 31.3 in | Too wide: plan a route through a wider opening |
Before delivery day, run through the route:
- Measure every door, hallway turn and stair between the street and the bathroom, including the width between handrails and the headroom at any landing.
- Take doors off their hinges where the fit is tight, and pad the jambs.
- Line up enough people or your installer's crew for the day the freight arrives, with an appliance dolly and straps.
- Keep the tub in its packaging until it is in the bathroom, and protect the floors along the way.
- Check the ship date on the tub's page before you book the installer.
Our guides to moving a bathtub and bathtub dimensions go further on the route itself.
Before you order
- Find your tub's filled weight and load on footprint in the table above.
- Work out where the tub will sit: slab, ground floor over a basement, or upstairs.
- Show the numbers to your contractor, or to a structural engineer if the decision table says so.
- Measure the delivery route against the tub's carry width.
- Tape down the free full-size paper template to check the footprint in the room. Order it from the free material sample and template page.
Our soaking tub buying checklist puts weight alongside depth, length and hot water. When your floor and your route check out, compare every model in our soaking tubs collection.
FAQs
How much does a full bathtub weigh?
A full Badeloft soaking tub weighs 977 to 1,919 pounds with a 200-pound bather in it. That is the empty tub (240 to 551 pounds), its full capacity of water at 8.34 pounds a gallon, and the bather. For any other tub, add the empty weight, the gallons times 8.34, and the people in it.
How much does a bathtub full of water weigh?
The water alone weighs 8.34 pounds per gallon, so a 60-gallon tub holds about 500 pounds of water and a 100-gallon tub about 834. In our 27 tubs the water ranges from 517 to 1,168 pounds, and it weighs more than the tub itself in every model.
Can a second floor support a freestanding tub?
Usually, yes. Many wood-framed upper floors carry a full freestanding tub, but the answer depends on the joist size, span, condition and where the tub sits. A filled Badeloft tub puts 64 to 128 pounds per square foot on its footprint, against the 40 pounds per square foot the residential code uses for areas other than sleeping areas, so have a contractor or structural engineer check the framing before you order.
How heavy is a stone resin tub?
Badeloft stone resin tubs weigh 240 to 551 pounds empty, and about half of them weigh 341 pounds or less. The lightest is the 62.9-inch BW-03-M at 240 pounds and the heaviest is the 74.8-inch BW-01-XXL at 551 pounds.
How do you reinforce a floor for a heavy bathtub?
A structural engineer specifies the fix, and common ones are sistering new joists alongside the old ones, adding solid blocking, or adding a beam or post below. The work happens with the subfloor open, so it belongs in the renovation plan before tile goes down.
How do you get a heavy bathtub upstairs?
Measure every door, hallway turn and stair, including the width between handrails, then take doors off their hinges where the tub is tight. Most of our tubs are 21.2 to 25.2 inches wide carried on edge. Use a crew with an appliance dolly and lifting straps, or hire movers, because even the lightest tub is far beyond what one or two people should lift.
References
- U.S. Geological Survey, Water Science School: "Water Density." https://www.usgs.gov/water-science-school/science/water-density
- International Code Council: "2021 International Residential Code, Chapter 3 Building Planning," Table R301.5 Minimum Uniformly Distributed Live Loads. https://codes.iccsafe.org/content/IRC2021P2/chapter-3-building-planning
- National Institute for Occupational Safety and Health (CDC): "Applications Manual for the Revised NIOSH Lifting Equation," DHHS (NIOSH) Publication No. 94-110, revised September 2021. https://www.cdc.gov/niosh/docs/94-110/default.html