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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  • We will reply to your comment shortly
    David Mullins · 05/04/2017
    I have a western red cedar fence that is unfinished and about 18 months old. It is six feet tall and 185 linear feet. Id like to use TWP 100 semi-transparent. How much should I order?
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    TWP Stains · 05/01/2017
    WilliamRob.:
    We live in Iowa. Green treated deck, 200 sq. ft. in full sun. Stripped all old finish off and used Woodsman Brightner. We would like to stain it with the Cape Cod color. What is your advice about how to proceed?

    All of the old stain does need to be removed first. Woodsman brightener is not a stain stripper. Did all of the old stain come off? If so, you should be good to stain.
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    WilliamRob. · 04/30/2017
    We live in Iowa. Green treated deck, 200 sq. ft. in full sun. Stripped all old finish off and used Woodsman Brightner. We would like to stain it with the Cape Cod color. What is your advice about how to proceed?
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    TWP Stains · 04/20/2017
    Tom Russo:
    We have a new mahogany porch deck in full sun. Is the TWP 1500 the right product for this application? Any color recommendations for mahogany? Thankms

    TWP Rustic color is what most use.
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    Tom Russo · 04/20/2017
    We have a new mahogany porch deck in full sun. Is the TWP 1500 the right product for this application? Any color recommendations for mahogany? Thankms
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    TWP Stains · 04/05/2017
    charles Jones:
    I treated a new 12X24 treated wood deck with 5gals of 1500 in natural (1530) a little over 3 yr ago. I live in Virginia and need to retreat. Would 1500 work and will I need any pre-treatment? I plan to pressure wash it first.

    Prep with the Gemini Restore Kit and pressure washing. Stain with the TWP 1500 Series.
  • We will reply to your comment shortly
    charles Jones · 04/05/2017
    I treated a new 12X24 treated wood deck with 5gals of 1500 in natural (1530) a little over 3 yr ago. I live in Virginia and need to retreat. Would 1500 work and will I need any pre-treatment? I plan to pressure wash it first.
  • We will reply to your comment shortly
    TWP Stains · 03/31/2017
    staceysearcy:
    buying a cedar house that was last stained using the 100 series. Should I use the same color and series?

    Yes that would be the easiest thing to do.
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    staceysearcy · 03/31/2017
    buying a cedar house that was last stained using the 100 series. Should I use the same color and series?
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    TWP Stains · 03/29/2017
    Dave Faeth:
    I'm re-decking with new kiln-dried 5/4 x 6 western red cedar and want to use oil-based semi-transparent cedartone - which TWP do I use? In Michigan and VOCs are ok

    The TWP 100 Series. Wait a month after install to stain. Prep first with the Gemini Restore Kit.
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    Dave Faeth · 03/29/2017
    I'm re-decking with new kiln-dried 5/4 x 6 western red cedar and want to use oil-based semi-transparent cedartone - which TWP do I use? In Michigan and VOCs are ok
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    TWP Stains · 03/09/2017
    Drew Harvey:
    I have ~ 1000 sq ft of decking that I stripped and coated last year with TWP 1500 Redwood stain. The deck was a mix of old and new wood. Looks good but I want to now put down an additional coat. Do I need cleaner? Is 5 gal adequate?

    Lightly clean to remove any dirt first. The coverage will be about 150-200 sq. feet for the maintenance coat. About 5-7 gallons.
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    Drew Harvey · 03/08/2017
    I have ~ 1000 sq ft of decking that I stripped and coated last year with TWP 1500 Redwood stain. The deck was a mix of old and new wood. Looks good but I want to now put down an additional coat. Do I need cleaner? Is 5 gal adequate?
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    TWP Stains · 03/03/2017
    Glenn J Mancini:
    I have 210 square feet of cedar siding. Please recommend your best semi transparent stain.

    Where do you live?
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    Glenn J Mancini · 03/03/2017
    I have 210 square feet of cedar siding. Please recommend your best semi transparent stain.
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    TWP Stains · 02/15/2017
    Richard Allee:
    I need to redeck a pontoon boat , your product was suggested by some one who has done so, it will be new 3/4 plywood , any suggestion on which stain to use and which plywood would be best ? marine grade is very expensive at 131 dollar a sheet , so was wanting to use something less so.

    Use the TWP 1500 Series. Sorry, but we are not experts on types of plywood for pontoon boats. The marine grade sounds like it would be the best wy to go.
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    Richard Allee · 02/15/2017
    I need to redeck a pontoon boat , your product was suggested by some one who has done so, it will be new 3/4 plywood , any suggestion on which stain to use and which plywood would be best ? marine grade is very expensive at 131 dollar a sheet , so was wanting to use something less so.
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    TWP Stains · 01/23/2017
    Ron Sitka:
    I have a large deck that was treated with Thompson's Water Seal about a year ago. Can I go over that with TWP 1500 now? What prep?

    You will need to remove the Thompsons first using this:

    https://www.twpstain.com/restore-a-deck-stripper-brightener-kit-detail
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    Ron Sitka · 01/23/2017
    I have a large deck that was treated with Thompson's Water Seal about a year ago. Can I go over that with TWP 1500 now? What prep?
  • We will reply to your comment shortly
    TWP Stains · 10/25/2016
    Steve Butler:
    I'm staining a new pressure treated pine deck in San Antonio, TX. It will have a roof over it. 598 sq ft according to your site's calculator. The calculator says estimates for "refinishing." Do new decks require more or less stain than older decks.

    Please see this about new decks:

    http://www.twpstainhelp.com/prepping-new-wood-for-twp-stains/