Hardwood Floor Refinishing Cost Calculator: DIY vs Pro Prices

How I choose the sanders I recommend

Professional hardwood floor refinishing costs $3 to $8 per square foot, according to HomeAdvisor and Fixr, and a screen and recoat costs $1 to $2.50. Doing it yourself costs a fraction of that: in our worked example a 312 sq ft floor comes to about $400 in rentals, sandpaper and finish, against $940 to $1,560 for a pro. The hardwood floor refinishing cost calculator below gives you both numbers for your own rooms, wood and finish, plus the sandpaper by grit, the gallons of finish to buy and how many days the job takes.

Most cost calculators stop at a price per square foot. This one also writes the shopping list, because that is where a DIY budget goes wrong: too few sheets of the first grit, a gallon short on the third coat, or a second rental day nobody planned. Every pro price comes from a named cost guide, every coverage rate from the finish maker’s data sheet, and every price in the tool can be edited.

Hardwood Floor Refinishing Cost Calculator

Add each room as a rectangle, or switch to Total square feet if you already know the area. Pick the state of the floor, the wood and the finish, and the estimate updates as you type. Open Edit the prices we use to put in your local rental and store prices.

How Much Does It Cost to Refinish Hardwood Floors?

The three big cost guides agree on the headline. HomeAdvisor (updated June 20, 2026) puts the cost to refinish hardwood floors at $3 to $8 per square foot, with an average project of $1,892 and most between $1,107 and $2,681. Fixr gives the same $3 to $8 per sq ft and a $1,200 average for a 200 sq ft oak floor. HomeGuide splits it by method: $2 to $7 per sq ft to sand and refinish, $3 to $8 if you also stain. Labor is most of the bill: HomeAdvisor says up to 80% of the price, and Fixr puts it at around 80%.

Cost per Square Foot by Job

What you pay depends first on how much work the floor needs. These are the per square foot figures the calculator uses, with where each one comes from.

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Screening (also called buffing) removes only the top of the old finish before a fresh coat, so it skips the sanding to bare wood that makes up most of a full refinish. HomeAdvisor and Fixr put it at $1 to $2.50 per sq ft; HomeGuide quotes $2 to $5 for “screen, buff and recoat”. The calculator starts from the lower figure for one coat and adds HomeGuide’s extra-coat price for each coat after the first, which lands a two-coat recoat at $1.50 to $4.25 per sq ft, between the two guides.

Cost by Wood Type

Common woods cost about the same to refinish; soft, hard or unusual ones cost more because they take more care. HomeAdvisor explains that pine dents and scratches easily, maple is hard to stain evenly, mahogany needs slow, careful sanding, and bamboo has to be sanded at an angle on the first pass to avoid splintering.

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The calculator uses the HomeAdvisor column, the most recent of the three. If you are staining, it adds $1 to $3 per sq ft on top, the staining cost HomeAdvisor and Fixr both give.

Cost by Floor Size

Size drives the total, and small jobs cost more per square foot. HomeAdvisor notes that one small room often runs higher per sq ft because the pro still has to cover travel, materials and equipment, and HomeGuide warns that some refinishers have a minimum charge. At the national $3 to $8 range:

• One 12 x 12 bedroom (144 sq ft): $430 to $1,150, often more after a minimum charge
• 500 sq ft: $1,500 to $4,000
• 1,000 sq ft: $3,000 to $8,000
• 2,000 sq ft: $6,000 to $16,000, which matches HomeGuide’s figure for a 2,000 sq ft house with stain

DIY Floor Refinishing Cost

A DIY refinish has four costs: the sander rental, the sandpaper, the finish and, if you change the color, the stain. In the calculator’s default example (two rooms, 312 sq ft, oak, water-based polyurethane, a drum sander and an edger) the split is $125 for one day of rentals, about $166 of sandpaper and $113 of finish. Sandpaper is the line people underestimate, because every grit needs fresh sheets.

Floor Sander Rental Cost

Rental prices are set store by store, so here is what four rental counters publish for a day. Bob Vila’s survey of The Home Depot, last updated June 3, 2024, gives Home Depot averages; the three independent stores were checked on October 1, 2026.

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The calculator defaults to $75 a day for a drum sander, $50 for an edger and $75 for an orbital floor sander. A drum sander sands the main floor fast but leaves a strip along the walls for the edger. An orbital floor sander (a square buff or a multi-disc machine such as the U-Sand or EZ Sand) is slower and much more forgiving, which is why it is also the machine for screening a floor before a recoat. Both usually come without sandpaper: Westville’s listing, for one, says the pad and sandpaper are sold separately. Which machine to rent, the weekly rates and when buying beats renting are in our floor sander rental guide.

Sandpaper: Grits and How Many Sheets

Bona’s standard sequence for refinishing a wood floor is 50, 60, 100 and 120 grit, with 36 first on badly uneven floors; the edges go 60, 100 and 120. Minwax tells you to stop at 100 grit when you are going to stain and at 120 when you are not. Drum sheets sold in the US usually come in 36, 40, 60, 80, 100 and 120, so the calculator plans:

• Light wear: 40, 60, 100 and 120 on the drum or orbital; 60, 100 and 120 on the edger
• Deep scratches, stains or cupping, or board repairs: 36, 60, 100 and 120 everywhere
• Staining: the same, without the 120
• Screen and recoat: one pass with a 120-grit screen, the grit Minwax gives for scuffing a sound finish

The coarse first grit does most of the work and wears paper fastest, so the calculator allows one drum sheet or 12 x 18 sheet per 50 sq ft on the first grit and one per 100 sq ft on each grit after it, one edger disc per 20 feet of wall on the first grit and one per 40 feet after it, and one screen per 150 sq ft. These allowances are our planning figures, not a manufacturer’s, and an old floor with thick finish can eat more. Rental counters sell sheets one at a time: RC Engine Service lists 8-inch drum sheets at $7 to $9 each and 12 x 18 sheets at $6, and A Tool Shed lists 7-inch edger discs at $1 to $1.25 (October 1, 2026). The grit-by-grit reasoning is in our sandpaper grit chart for floors.

Finish: How Much Polyurethane or Oil to Buy

Divide the floor area by the coverage on the can for each coat, then add about 10% for the edges, the applicator pad and the last gallon you don’t want to run out of. These are the rates the makers publish:

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The calculator uses 500 sq ft per gallon for water-based polyurethane, 600 for oil-based and 258 per liter for hardwax oil, and it sets the number of coats to the maker’s instruction: three on bare wood for both Minwax polyurethanes, two over stain or on a screen and recoat, two coats of Osmo on bare wood and one when renovating an oiled floor. For price it uses $50 a gallon for water-based and $40 for oil-based polyurethane, inside the $25 to $55 and $20 to $45 ranges HomeAdvisor gives, and $68 a liter for hardwax oil ($169.99 for a 2.5 liter can of Osmo Polyx-Oil at Oak Tree Supply on October 1, 2026). Floor-grade professional finishes cost more: Panel Town lists Bona Traffic HD at $153.21 a gallon. To choose between water-based, oil-based and hardwax oil, see my comparison of the best wood floor finishes.

Stain

Staining adds a product, a day and a cost. Minwax lists 400 to 500 sq ft per gallon for its Wood Finish penetrating stain, and the calculator uses 400 for one coat, plus 10%. HomeAdvisor puts stain at $30 to $100 a gallon; the calculator starts at $40. Minwax’s sheet gives 6 hours before the stain is dry enough to use, and humid weather stretches that. If you want a new color, there is no shortcut: Minwax says changing the color means sanding to bare wood.

DIY vs Pro: Which Is the Better Deal?

On price alone DIY wins by a wide margin: a third of the pro quote or less on a typical 1,000 sq ft job. What you buy with the difference is skill, speed and the warranty on the work.

When Doing It Yourself Makes Sense

• Solid oak or similar in fair condition, one color, rooms with straight walls.
• You can live without the rooms for a few days and move the furniture yourself.
• You choose an orbital floor sander if you have never run a drum. It is slower, but it is hard to gouge a floor with it.
• The floor only needs a screen and recoat. It is the cheapest DIY job, about $340 for 1,000 sq ft in the calculator. Here’s how to screen and recoat hardwood floors, and the tests to run first.

When to Pay a Pro

• Engineered flooring with a thin wear layer. HomeGuide says it needs at least 2 mm to sand, and most engineered floors take 1 to 3 refinishes in their life. A drum sander can go through that in seconds.
• Maple, parquet or exotic woods. Maple is hard to stain evenly, and parquet grain runs in different directions, which HomeAdvisor and Fixr both flag as specialist work.
• Stairs. HomeGuide puts them at $25 to $85 per step and Fixr at $25 to $45, and they are slow, detailed work by hand.
• Allergies or a home you can’t empty. Dustless sanding costs $2 to $4 more per sq ft (HomeGuide), and HomeAdvisor reminds you it reduces dust rather than removing it.

How Long Does It Take to Refinish Hardwood Floors?

HomeGuide puts a professional refinish at 2 to 6 days, depending on the area, the number of coats and drying time. Most of that is waiting for finish to dry, and the finish you pick sets the pace (every stage of the job is in our guide on how to refinish hardwood floors):

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The calculator counts DIY sanding days from the area (about 500 sq ft a day with a drum sander and edger, 250 with an orbital floor sander and 1,000 for screening, our estimates for someone doing it for the first time), then adds the stain drying time, the wait between coats and the time to light foot traffic. A 1,000 sq ft floor in water-based polyurethane works out to two days of sanding and two of finishing.

Refinish or Replace Hardwood Floors?

Refinishing is far cheaper whenever the boards are sound. HomeAdvisor says refinishing costs two to three times less than replacing, and the replacement figures show why: $5 to $15 per sq ft installed according to HomeAdvisor, $11 to $25 or more according to HomeGuide, and $14 to $32 to replace according to Fixr. Replace when the damage goes into the wood itself: severe water damage, warping, boards too thin to sand again, or, on engineered floors, a wear layer that is already gone. Isolated bad boards are a repair: HomeAdvisor prices board replacement at $6 to $12 per sq ft, and the calculator adds that to the refinish when you choose Some boards need replacing.

What to Buy Before Rental Day

Rental counters sell sandpaper sheet by sheet, which is the cheaper way for one or two rooms. For a whole floor, or if your rental shop is out of a grit, buying full packs ahead of time saves a second trip. Check the sheet size and the edger’s arbor hole against the machine you rent before you order. For the sanders themselves, see our guide to the best sanders for floors.

Virginia Abrasives Drum Sander Sheets, 36 Grit, 8 x 19-1/2 in.

Made for drum sanders that take 8 x 19-1/2 inch flat sheets with notches: the listing names the Clarke EZ-8, the Clarke DU-8 and the Hiretech HT8. 36 grit is the first grit on a floor with deep scratches, stains or a thick old finish. The 50-pack covers the first grit on about 2,500 sq ft at the calculator’s allowance, so it pays off on a whole house, or when the rental counter is out of the grit you need. The same sheets come in 80 grit and 100 grit. An Essex Silverline SL-8 takes a longer 8 x 20-1/8 inch sheet: 36 grit for the SL-8.

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Sungold Abrasives Edger Discs, 60 Grit, 7 in. x 7/8 in.

Silicon carbide on heavyweight paper, with a 7/8-inch center hole slit for easy removal: the disc for the 7-inch edgers most rental stores carry. 60 grit is the edger’s first grit on a light-wear floor, and a 50-pack edges about 1,000 feet of wall at the calculator’s allowance. The same discs come in 40 grit and 100 grit. Check the edger’s arbor before you order, because 7-inch discs are also sold with a 5/16-inch hole.

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Mercer Industries 12 x 18 Floor Sanding Sheets, 60 Grit

Precut sheets for 12 x 18 inch square buff machines: the listing names Clarke, Deva and Silver Line. The silicon carbide grain sits on an extra heavyweight paper, and the back has enough grit to hold on the sanding pad. This is the paper for the orbital route in the calculator. Mercer sells the same 20-packs in 36 grit and 100 grit, and 12 x 18 screen sheets for screening a floor before a recoat.

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Mercer Industries 16-Inch Floor Sanding Screens, 120 Grit

If your rental store screens floors with a 16-inch buffer rather than a square buff, these are the discs: silicon carbide grit in an open mesh, made for floor buffers and rotary floor machines. Mercer lists them for taking off old finish and wax, sanding between coats and restoring worn areas. 120 grit is the grit Minwax gives for scuffing a sound finish before a recoat, and the 10-pack screens a large floor with spares.

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BOSCH GET75-6N 6-Inch Random Orbital Sander

Neither a drum sander nor an orbital floor machine gets into closets, around radiators or right into corners. A 6-inch, 7.5 amp random orbital sander with a turbo mode for faster removal handles those spots, and it is the tool you keep after the rental goes back: stair treads, thresholds, the odd repaired board. For the full comparison, see our best sanders for floors.

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DEWALT DWV010 HEPA Dust Extractor, 8 Gallon

Rental floor machines such as American Sanders’ EZ-8 drum sander and Super 7R edger have an on-board dust bag or a port to connect a vacuum. A HEPA extractor with automatic filter cleaning, like this 8-gallon DEWALT, keeps the fine dust out of the rest of the house and keeps pulling while the filter would otherwise clog. Check that its hose fits the machine’s port at the rental counter. More options in our best dust extractor guide.

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How the Calculator Works

The pro estimate multiplies your floor area by the per square foot range for the job and wood, then adds the extras you tick:

• Sand and refinish: the HomeAdvisor range for your wood, plus $1 to $3 for stain, $2 to $4 for dustless sanding and $0.50 to $1.75 for each coat beyond three (HomeGuide)
• Screen and recoat: $1 to $2.50 for one coat, plus HomeGuide’s extra-coat price for each coat after the first
• Repairs: $6 to $12 per sq ft of replaced boards (HomeAdvisor)
• Stairs: $25 to $85 per step (HomeGuide); moving furniture: $20 to $50 per room (HomeAdvisor and HomeGuide)

The DIY estimate adds the rental days, the sheets per grit, the finish and the stain at the prices in the price panel. When you enter rooms, the edge length for the edger is the sum of each room’s perimeter; with a total area it assumes square rooms. Finish is priced by the volume you buy, rounded up to gallons and quarts (or 2.5 and 0.75 liter cans for hardwax oil). Pro totals are rounded to the nearest $10.

There is no ZIP code box on purpose. None of the three cost guides publishes regional multipliers, only that metro areas and the Northeast charge more for labor (HomeAdvisor), and a made-up local factor would be less honest than a national range. If you have a local quote, compare its price per sq ft with the range above, and put your local rental prices in the price panel.

Sources

All pages and documents were read on October 1, 2026.

• Pro costs: HomeAdvisor, How Much Does It Cost to Refinish Hardwood Floors? (updated June 20, 2026); HomeGuide, How Much Does It Cost to Refinish Hardwood Floors? (July 14, 2025); Fixr, Cost to Refinish Hardwood Floor (updated January 31, 2025)
• Rental rates: Bob Vila, Renting a Floor Sander: How Much It Costs (Home Depot averages, updated June 3, 2024); Cal-West Rentals drum sander, edger and square buff; Westville Grand Rental Station floor sanders; Sully’s Rental square buff
• Sandpaper prices: RC Engine Service, Virginia Abrasives drum sheets; A Tool Shed, 7-inch edger discs
• Grits: Bona, sanding sequences for wood floors; Minwax, Super Fast-Drying Polyurethane for Floors technical data sheet
• Finish coverage, coats and drying: Minwax Ultimate Floor Finish technical data sheet (Rev. 1, 3/25/20) and Wood Finish stain data sheet (9/1/2026); Osmo, Polyx-Oil product information; Rubio Monocoat, Oil Plus 2C technical data sheet (2025); Bona Traffic HD coverage from Panel Town
• Finish prices: Oak Tree Supply (Osmo Polyx-Oil, 2.5 L), Panel Town (Bona Traffic HD) and Panel Town (Rubio Monocoat Oil Plus 2C)

Rental days and sandpaper quantities are our own planning allowances, explained in How the Calculator Works. Got a quote you want to check against these numbers? Ask in the comments.