Whether you're installing curtains or upholstering an ottoman with a cow hide, you'll want to ensure you take accurate measurements. Learn more about determining measurements in this blog.
Measuring for Unlined Draperies or Curtains
Always measure each window separately; as you know those that appear to be identical may not be.
There are three standard lengths for draperies or curtains:
Following are methods to help you estimate how much fabric to reserve. Your workroom should always follow through with precise measurements to finalize your yardage requirements.
Formula to calculate yardage needed for unlined draperies or curtains:
3 x total outside width of window divided by standard fabric width (48” or 54”) rounded up to the next highest number = width x total finished length (12” is included for top and bottom hems). Round to the next highest number then divide by 36” to get the number of yards needed. (24” is included for triple hand-sewn items.)
Estimating example for fabric with no repeat:
• Outside width of window is 63”
• Width of fabric you are using is 54”
• Total unfinished length of draperies is 114” (12” is included for top and bottom hems)
3 x 63” = 189” divided 54 = 3.5 rounded to next highest number = 4 (width)
4 x 114” = 456 divided by 36 = 12.6 yards of 54” fabric
If you plan to hang sheers behind the draperies, their length should be 3/8” shorter at the top, than the draperies they are to hang behind. Sheers are usually 4 times the width of the window.
Formula to calculate yardage needed for unlined draperies or curtains using fabrics with repeats:
Divide total length before hemming by length of repeat and round it off to next highest number to give you finished length.
3 x total outside width of window divided by standard fabric width (48” or 54”) = width. Multiply by total finished length divided by 36”. Multiply your answer by 11 to get number of yards needed.
Estimating example for fabric with repeat:
• Outside width of window is 63”
• Width of fabric you are using is 54”
• Total unfinished length of draperies is 114” (12” is included for top and bottom hems)
• Length of repeat is 11”
114” divided by 11” = 10.36 rounded to next highest number = 11 (total finished length)
3 x 63” = 189” divided by 54” = 3.5 rounded to next highest number = 4 (width)
4 x 11 = 44 divided by 36 = 1.2
1.2 x 11 = 13.2 yards of 54” fabric with repeat is needed.
Wallpaper - How to Calculate Rolls Needed
For calculating rolls needed, use the following method.
1. Find the repeat length, if any.
2. Using the following chart, find the usable yield for the wall covering selected.
3. Divide the square footage figure you have previously calculated by the usable yield for the wall covering selected. This will give you the number of single metric rolls needed or the number of American rolls needed.
*These figures work well for normal sized walls. For unusually short (under 3 feet - such as over kitchen cabinets) or high (above 9 feet) walls, they do not apply and you should have your professional paperhanger calculate your wall covering needs.
Estimating Example for Metric Single Rolls
With the measurements you have made, you find that the room you are hanging has a total of 340 square feet. Your selection has a 9-inch repeat. In the appropriate line under Repeat Length in the Usable Yield Chart, you find that your selection has a usable yield of 22 square feet. Dividing 340 by 22 equals 15.45 or 16 single metric rolls.
Estimating Example for American Single Rolls
With the measurements you have made, you find that the room you are hanging has a total of 340 square feet. Your selection has a 9-inch repeat. In the appropriate line under Repeat Length in the Usable Yield Chart, you find that your selection has a usable yield of 30 square feet. Dividing 340 by 30 equals 11.33 or 12 single American rolls.
After finding the number of rolls needed for the wall(s) or room you are hanging, deduct one half roll (if metric) for each standard size door or window. Design repeat of the pattern and length of roll may increase your rollage needs. Your professional paperhanger can advise you if the wall covering selected will significantly affect your rollage needs.
Note first that there is no simple means of calculating rollage needs that is always 100 percent accurate. The pattern repeat, rooms of unusual size or shape, greater than normal wastage during the hanging, or other special circumstances can throw off any estimate.
A Quick Guide for Measuring and Calculating Leather Footage
Leather is measured in square feet. Leather hides come in irregular shapes. Each yard of 36” fabric is equal to 12 square feet of leather. Each yard of 50” fabric is equal to 16 square feet of leather. Each yard of 54” fabric is equal to 18 square feet of leather.