Calculator

These calculations will help you determine the square footage for the proper amount of stain and prepping supplies needed to refinish your deck or fence using TWP 100 or TWP 1500 Series.

This is intended to provide you with an approximate estimate only. Material requirements may vary according to application method, surface condition, and weather conditions.

Prepping Options

  • Gemini Restore Kit. This will be used for new, gray, dirty decks and for applying TWP over an intact older coating of TWP.
  • Restore-A-Deck Stripper and Restore-A-Deck Brightener. This is used for removing old coatings of stain. Use this if you are switching from a different brand to TWP or if you have a neglected coating of TWP that has failed unevenly.

Deck Sq. Footage

Flooring Length x width =?

Railing Length x height =?

Steps Width x Depth x #of Steps =?

Add up all 3 for the Total Sq. footage.

Fence Sq. Footage

Length x height =?

Multiply x 2 for both sides = Total Sq. Footage

If you have questions, please ask below.

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    Cathy · 10/08/2019
    I have just built a deck using treated lumber from Menards and want to protect it. I would chose an oil based semi-transparent product. I have read many helpful comments and instructions but I am still unsure about the timing of the application to "new" wood. It's fall here and the temperatures are falling. Suggestions please for product (1500 or ?) and when to apply. Thanks
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    Tary · 08/27/2019
    My deck right after powerwashing
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    Tary · 08/27/2019
    My deck is three years old, today it was power washed and the recommendation was to use your product. No previous stain or sealant was ever applied. I am in Michigan. May I have your suggestions on best way to proceed.
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    Roger Hultgren · 08/17/2019
    Sorry, forgot the deck size on last post. It is 10x10 with railing of 10' and 35" high.
    Roger
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    Roger Hultgren · 08/17/2019
    I have purchased an older home on Cape Cod MA about 1.2 miles from the ocean for our retirement. The deck and railing material is redwood. Ti was installed at least 10+ years ago. I have removed all paint and old stain and sanded with 120 grit paper. the wood is of good quality with no rot. I would like to stain with a redwood stain. what do you recomend, how many coats and which product is best for this area? Also, do you have any dealers in the Hyannis MA area?
    Thank you
    Roger
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    Gary · 08/13/2019
    7 ft. X 36 ft. porch ceiling with bare (cleaned) rough finish cedar T&G 1X6 boards.
    How much 101 cedartone natural stain is recommended for one coat? Also what applicator do you recommend for best result?
    Located near Seattle.
    • We will reply to your comment shortly
      TWP Stains · 08/13/2019
      2 Gallons. Apply with a stain pad applicator.
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    Sami · 07/23/2019
    Deck is 16 months old pressure treated pine(picture attached). We would like to stain it with honetone. Do I need to apply one coat or two coats of stain.? We will use the cleaner and brightener kit before staining. We are in New Jersey. Do we use the 1500 series?
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      TWP Stains · 07/23/2019
      yes, use the TWP 1515 Honeytone. Two light coats applied wet on wet.
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    steve · 07/18/2019
    I have a big deck down by the river and I am going to stain after cleaning, what product should I use

    100 series or 1500?
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    Diane · 06/27/2019
    Hi. Installing a new cedar deck and your product has come highly recommended. The lumberyard says the wood is kiln dried but still has mill glaze on it. TSP wash was suggested. Is the TSP okay to use? How soon after install can it be stained? Also, the calculator says I'd need 5 gallons for a 400 square foot deck. That isn't too much? If there is a lot left over how long will it be good for? Thanks for the help.
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    Eddie Eastwood · 06/15/2019
    I power washed and sealed my dock over the winter with Rain Guard, something I bought at Orchard Hardware before they closed. It's water based similar to Thompsons. Can I just powerwash to clean the dock or do I need strip and brighten before applying TWP?
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      TWP Stains · 06/16/2019
      You will need to stip and brighten for prep.
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    Cindy Williams · 06/12/2019
    We have aluminum balusters so we only need to Stan the top and bottom of the railing and the posts. Our deck is 700 square feet and has one step . This is the first time so we are only doing one coat . Will 5 gallons be enough?
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      TWP Stains · 06/13/2019
      Does the 700 account for the railings, sides of the deck, and the stairs?
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    Ginny Freudenberger · 05/31/2019
    The "calculator is for deck measurement. Do you have calculator for house measurement.??
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      TWP Stains · 05/31/2019
      Just do length x height for each side of the house.
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    Jim · 05/26/2019
    Have a new 12&18 pergola not sure how much I would need?
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    DeWayne · 05/06/2019
    I'm in Northern New Mexico, and built a new privacy fence last year, so it has been up for a little over a year. I would like to treat it with your product, what do you suggest and what is the time frame I can figure on receiving the product. I have about 104' of fence at a little over 6' high?
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    Kathy · 04/29/2019
    We put one coat of dark oak 103 on our deck floor this week. we think a second coat would give it a richer look, is that okay to do? We live in Charleston SC
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      TWP Stains · 04/29/2019
      As long as the wood is still absorbent than it should be okay. One very light coat.
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        Kathy · 04/29/2019
        thank you for your quick response - I'll post pics once we are done with the project! Love the product
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    Jack R · 04/26/2019
    If I have 750 sq ft of decking, do I add in an additional 375 sq feet for the wet on wet application? Actually, what I need to know is how much TWP 100 series I need to purchase for Houston, TX after stripping and brightening.
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      TWP Stains · 04/27/2019
      The calculator tells you how much to use when you input your numbers for two coats applied wet on wet. 7-8 gallons.
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    dan · 04/23/2019
    I have a cedar fence that is one year old. I have never stained or sealed it before. What stain do you recommend if i'm looking for the color of the cedar to be the same as if it's "wet"?
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      TWP Stains · 04/23/2019
      Look at Honeytone in the 100 or 1500 Series.
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    Dan · 04/23/2019
    Does your calculator account for 2 sides of a fence or do i need to double it?
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      TWP Stains · 04/23/2019
      This a deck calculator, not for fences. Fence math is very easy. Length x Height x 2 for both sides. Divide that by 100 and you will get the gallons needed for 2 coats applied wet on wet to both sides of the fence.
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    Michael · 03/30/2019
    Please define "wet on wet" Thanks...Michael
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    Andrew · 03/24/2019
    Last year I stained my deck with the 1503 Dark Oak (love it). This year I plan on staining my fence, also with the Dark Oak. It is a 6' pine fence that is exactly one-year old. The fence is 250' long, so I will need to cover 3000 sq ft (250*2*6). I know the stain covers approximately 150-300 sq ft / gallon, but should I expect to be on the low or high end of that given that it's a one-year old pine fence that has never been stained? Also, I'm hoping that, again because of it's age, I can just lightly pressure wash and then stain without needing any type of pre-treatment. Is that correct? Thanks!
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      TWP Stains · 03/25/2019
      For two coats applied wet on wet, you will need about 25-30 gallons for 3000 sq feet. You will need to prep with the Gemini Restore Kit: https://www.twpstain.com/gemini-s-restore-a-deck-cleaner-and-brightener-kit

      You cannot just lightly prep. You have to remove mill glaze and oxidation.
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        Andrew · 03/31/2019
        Thanks for the reply. Given the amount of stain required and the need for 3000 sq ft worth of prep kit, I'm thinking I'd like to put this off for another year so I'm better prepared for the cost. Would one more year of unprotected exposure (I live in Central Ohio) be so terrible? That is, would I do any damage or somehow make the job even harder more expensive by waiting an additional year? Thanks again!
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          TWP Stains · 03/31/2019
          It will not harm the wood but it will make it harder to prep. More oxidation/graying to remove.
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            Andrew · 04/01/2019
            One last question...would there be any downside to prep/staining the outside of the fence this year, and then doing the inside of fence next year? Would this lead to any strange aging effect (like warping)?
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              TWP Stains · 04/01/2019
              We would not suggest that. You will have issues with drips on the opposite side.