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The Online Quilt Calculator is designed to provide you the number of blocks needed to make a quilt based on your input of block size, desired quilt width and desired quilt length. If your quilt will have sashings and/or borders, it includes them in the calculation. You can calculate the overhang of your quilt using the Calculate Overhang calculator. You can also adjust your entries and see new results based on them. Click “Clear Results” to clear the calculator at any time. All fields are cleared when you click “Clear Results“.

To use the Online Quilt Calculator, you must enter at least the first three items. To calculate cornerstones and sashing pieces, enter all of the items. If you plan on a border or borders, enter the width for each border. Four borders are allowed with this calculator. To compute:

  • Enter the finished block size
  • Enter the desired quilt width
  • Enter the desired quilt length
  • Enter the finished sashing width (leave blank if none)
  • Click in Yes if you are using cornerstones (requires sashing width to calculate)
  • Enter the finished width of each border (leave blank if no borders)
  • Scroll down and click “Calculate”

Your Results displays your results highlighted in yellow. Sometimes the number of blocks needed across or down comes out as a decimal (shown in calculated blocks across and calculated blocks down). Since we don’t generally use partial blocks in quilt making, the calculator rounds these two answers to the nearest whole number and shows it as suggested blocks across and suggested blocks down.

Using the suggested blocks across and suggested blocks down, it provides the results for the total number of blocks needed and the actual quilt width and actual quilt length. If you are using cornerstones, it calculates the number and size of the cornerstones as well as the number and size of sashing pieces required. You can change any part of your original input and click calculate to see the new result. The new answer will replace your original answer.

In Adjust Your Results, you can enter new numbers for the blocks across and blocks down. The calculator uses your original input and recalculates to provide adjusted results. These results are displayed in light blue. You can compare the Adjusted Results to the Calculated Results to see how the change in the number of blocks affects the quilt width, length, and number of cornerstones and sashings, if used.

Calculate Overhang will display how much overhang on the sides and end of the different mattress sizes. Enter the actual quilt width and length, select the bed size, and click ‘yes’ or ‘no’ for pillow cover (tuck). If you click ‘yes’, enter in inches the allowance you want for the pillow tuck. Then click “Calculate Overhang“. Your results are shown highlighted in light blue. You can adjust your input of width and length or change the bed selection and click calculate again. Your original answer will be overwritten with the new answer.

Go to the Online Quilt Calculator.

Note: This Online Quilt Calculator is provided compliments of Maine Quilt Company. It is free for non-commercial use only. Though Maine Quilt Company strives to provide quality and accuracy, Maine Quilt Company makes no warranty or guarantee as to the calculator’s performance or accuracy. Maine Quilt Company will not be liable for damages resulting from the use of its calculators and the user assumes all risks associated with the calculator’s performance and accuracy.

The Quilt Calculator is Copyright Julie M. Watkins 2017-2021 – All Rights Reserved – Maine Quilt Company