Prep first
Before you start
- Reach for an acidic cleaner made for lime and scale. Skip chlorine bleach, which is alkaline and isn't recommended here.
- Check the surface first, since vinegar and acid descalers can etch or dull marble.
- Keep contact short, and rinse promptly and thoroughly with cold water.
- Towel-dry shower heads and faucets after each use to slow new buildup.
Hard water stains on tile are white, chalky deposits left when calcium and magnesium dry out of the water, and they turn flaky, tan or brown as they build up. Natural stone such as marble can be etched by acid, so pick the cleaner to match the tile, never the other way round. Whether it's bathroom tile, shower tile or ceramic, porcelain and stone tile, check the material before you reach for any bottle.
Test your scale remover on a small hidden patch first, especially on natural stone. Hard water stains on black tiles show up clearly, so wipe each pass dry to check your progress. Calcium on pool tile at the waterline needs the same gentle approach, because stronger products can etch stone.
Before you start
What tile can take
Safe to use1
- Water
Use with care7
- Hot water
- Soaking
- Chlorine bleach
- Solvents (alcohol, spot removers)
- Acids (vinegar, lemon)
- Scrubbing and abrasives
- Heat, once the stain is out
7 items
What you'll need
Tap an item to get it on Amazon, or tick what you already have.
- Acidic lime-and-scale cleanerDissolves the calcium and magnesium deposits. Choose one made for lime and scale. (opens Amazon)
- Mild soapLifts loose soil before the acid goes on. (opens Amazon)
- Soft clothsWipe and scrub without marking the tile. (opens Amazon)
- Soft brush or vacuumClears loose dirt so the cleaner can reach the scale. (opens Amazon)
- Plastic or nylon scrub padGentle scouring if a cloth doesn't lift the scale. (opens Amazon)
- Clean towelDries the tile, edges and corners.
- Old toothbrushScrubs the face of a shower head in the stronger treatment.
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6 steps
Step by step
Step 1 of 6
Check the tile before cleaning
Look at what the tile is made of before you pick a cleaner. Marble and other natural stone can't take the acid step, and polished porcelain also needs care with acid-based chemicals. Test the cleaner on a hidden spot, such as behind a fixture, and wait for the result before you go on.
Careful. Vinegar and acid descalers etch or dull marble, and they can strip the seal from granite and other natural stone.
Step 2 of 6
Sweep and wash with mild soap
For tile, sweep or vacuum the loose dirt first so the cleaner reaches the scale underneath. Then wash the tile with mild soap and warm water on a soft cloth, including the grout lines. Rinse the cloth often so you aren't pushing grit back onto the tile.
Step 3 of 6
Apply the acid cleaner briefly
Use an acidic cleaner made for lime and scale, and work it onto the scaled areas in small sections. Let it sit no more than 2 minutes.
Chlorine bleach has no place in this step, since it's alkaline and isn't recommended for hard-water stains. Then scrub gently with a soft cloth or a plastic or nylon pad, and move to the next section.
Careful. Don't leave an acid descaler on any surface longer than 2 minutes.
Step 4 of 6
Rinse thoroughly with cold water
Rinse the tile promptly and thoroughly with cold water, including the grout lines and edges. Alkaline cleaners may need several rinses, so keep going until the tile no longer feels slick or chalky.
Step 5 of 6
Dry the tile completely
Wipe the tile dry with a clean towel, including the edges and corners where water collects. Drying right away slows the next round of scale, so don't let the tile air-dry in streaks.
Step 6 of 6
Check for film and repeat
Look at the tile in good light for any chalky film or dull patches. If film remains, repeat the acid cleaning on that spot only, then rinse and dry it again. If it still shows after a repeat, move on to the stronger options below.
If you'd rather buy than mix
Best products for hard water on tile
Use microfiber cloths for the wipe-down and the final dry. Check the label of any acid cleaner for fluorine compounds before you buy it.
Zep Concentrated Calcium, Lime and Rust Stain Remover
Amazon Basics Microfiber Cleaning Cloths
How we picked these: each product is made for this type of stain, its maker doesn't warn against using it on tile, and its directions fit the steps above.
Finished the steps? How does it look?
Nice work. Let it dry completely and check it again in good light. Here is what done looks like:
How to tell it's really gone →A faint mark usually needs one more round, not a stronger product.
Heavy buildup usually takes more than one round.
Heavy or long-standing buildup →When to call a professional →How to tell it's working
The tile looks even and clear, with no chalky film when you wipe it dry. A dull patch that stays after rinsing means the scale is still there, so repeat the acid cleaning on that spot only.
What changes for yours
Adjust for your tile
Ceramic, porcelain and stone tile
Glazed ceramic follows the steps above as written, with a plastic or nylon pad for any scrubbing. Polished porcelain is the exception, so run the hidden-spot test before any acid touches it.
Natural stone such as marble, limestone, travertine and granite can't take the acid step at all. For stone, wash with mild soap and warm water only, rinse with clean water, and talk to a professional if the film stays.
Bathroom tile
Bathroom tile around the sink and tub gets the same steps, but pay attention to the spots where water sits. The faucet base, soap dish and tub edge are where scale tends to form first.
Work the cleaner into those spots in small sections and rinse each one before you move on. Wipe them dry after every use, since that's the simplest way to keep the next round of scale from building up.
Shower tile
Shower walls collect scale from every rinse, and the film often builds up right under the shower head and along the faucet. Work the cleaner over the wall in short sections, rinsing each section before you move to the next.
The shower head and faucet need their own treatment, which is in the stronger options below. Towel-dry the walls and fixtures after each shower to slow the next buildup.
Floor tile
Floor tile gets the steps above, and sweeping first matters more here because grit can scratch the surface as you scrub. Work in small sections so each one is rinsed completely before you move on.
Keep rinsing until the floor no longer feels slick, and check the corners and grout lines where the cleaner tends to pool. Once the floor is dry, look at it in good light and repeat the acid cleaning only on spots that still show film.
Tile and grout
Clean the tile first, then work the cleaner into the grout lines only, so it isn't sitting on the tile longer than needed. A soft brush helps get into the lines.
Cement grout can't take vinegar, so use the acid cleaner in the steps there instead of a home remedy. Rinse the lines thoroughly with cold water, since cleaner trapped in grout takes longer to clear.
Pool tile at the waterline
The line on pool tile is scale left where the water level sat. Clean the tile you can reach out of the water with the steps above, and run the hidden-spot test first.
The part of the tile under the waterline needs draining to reach, so don't drain the pool to test a method there. For that section, ask a pool service what they recommend.
Outdoor tile
Outdoor tile gets the same steps, but rain and sprinklers keep adding fresh minerals, so the film can return fast. Rinse with clean water right after cleaning so no cleaner dries on the surface.
Work in shade if you can, since heat dries the cleaner before it's rinsed away. Check the surface first, because some outdoor stone can't take acid.
Tile in Arizona or India
Hard water is local, and the film looks the same wherever it forms. Wherever you live, test the surface first, keep the contact time short and rinse well.
If your water leaves a heavy film, the stronger options below are the next step. Check the professional section too if the stain stays after several rounds.
Heavy or long-standing buildup
Old scale that has built up for months often needs a second pass rather than a longer one. Dried-on deposits on the tile face can be treated again after the steps, with a fresh application of the acid cleaner and the same 2-minute limit.
Shower heads and faucets can take a stronger soak: fill a large sandwich bag with white vinegar, submerge the fixture for a few hours, then remove, clean and dry it. For the face of a shower head, mix equal parts acid descaler and warm water, apply it for no longer than 2 minutes, scrub with an old toothbrush, and rinse with cold water. If the flow is still low, take the unit apart and soak the scaled pieces in white vinegar.
Realistically, some film on glazed tile may stay after several passes, especially where it has built up for years. Don't leave acid on the tile to make up for it; if the film still isn't gone, ask a professional.
Vinegar, baking soda, peroxide and more
Do home remedies work on hard water on tile?
Plenty of home remedies are sold for this stain, but most of them don't touch mineral scale. The acid cleaner in the steps does the real work, and the others either support it or stay in the cupboard. For pool tile, none of these replaces a method for working below the waterline without draining.
Helps1Skip5
Chemical safety
Never mix these
Some products in this guide react dangerously with each other. Use them one at a time and rinse with water in between.
Chlorine bleach + Vinegar
Vinegar is an acid, and acid mixed with bleach gives off toxic chlorine gas.
If they mix by accident: Stop and add nothing else; leave the area for fresh air, open windows and keep children and pets away; call Poison Control at 1-800-222-1222, or 911 if anyone has trouble breathing.
What makes it worse
Mistakes to avoid
Don't mix bleach with vinegar or descalers
Chlorine bleach mixed with vinegar, descalers, toilet-bowl cleaners or rust removers can form hazardous gas. Keep bleach away from tile: it's alkaline and isn't recommended for hard-water stains anyway.
Don't use fluorine-based cleaners on tile
Cleaners with fluorine compounds damage ceramic, glass and stone. Read the label first and skip any product that lists them.
Don't use no-rinse cleaners on floors
Residue from a no-rinse cleaner stays on tile floors and makes them less slip resistant. Stick with a product you rinse off, and rinse it away completely.
Don't scrub glass tile with steel wool
Scouring pads, steel wool and sandpaper scratch glass tile. Use a soft cloth or a plastic or nylon pad instead, even when the scale is stubborn.
When to call a professional
If the stain holds after the steps and the stronger options, or if the surface is natural stone or pool tile, a professional who works with that material is the safer call. Don't keep stepping up to stronger acids on a finish you aren't sure about.
Questions
What are hard water stains on tile?
They're white, chalky deposits left when calcium and magnesium in water dry out and turn into solid calcium carbonate and magnesium carbonate. Over time they can turn flaky, crumbly, tan or brown, so they're easier to remove while they're still light.
How can I stop scale from coming back on tile?
Towel-dry shower heads, faucets and tile after each use, since scale builds fastest where hot water evaporates quickly. Wipe off splashes as you see them, so less mineral is left behind to dry on the surface.
Which cleaner gets scale off tile?
An acidic cleaner made for lime and scale is the right type of product. Use it for the short contact time in the steps and rinse well with cold water. Keep it off marble, natural stone and cement grout.
How do I remove calcium from pool tile?
Below the waterline, the steps can't reach the scale without draining, so don't drain the pool to try one. Above the waterline, follow the steps, test a hidden spot first, and ask a pool service about the part under the water.
Can I clean hard water stains from grout with the same steps?
Yes, with the same acid cleaner, applied to the grout lines after the tile is clean. Use a soft brush to work it into the lines, and rinse them well with cold water.
Can I clean outdoor tile in the sun?
It's better to work in shade, since heat dries the cleaner before it can be rinsed away. Rinse with clean water right after, and check the tile again after rain or sprinkler runs.
Can I clean hard water off a shower head?
Yes, the stronger fixture treatments for set-in buildup can handle it, but keep them separate from tile cleaning. Towel-dry the head after each shower to slow the buildup.
Hard Water on other materials
Other stains on tile
Start from the bigger picture
How we know this
Every method, amount and warning here comes from university extension services, industry bodies and product makers. We read them, check every step for unsafe combinations and changed amounts, and write it up so you can follow it.