Quarter Inch: Quilt Calculator

Quilt yardage you can check.

Backing, binding, borders, batting and blocks. Every answer shows the working, so you never have to take a number on trust.

Coming soon to Google Play

Free. For Android.

Want to try it before launch? Email us to join the Android test.

Screenshot captioned “Yardage you can check”: the Backing calculator. Backing fabric: 3 ⅞ yards, which is 136″ of 42″ fabric. Seams run across: 3 ⅞ yd, 2 panels, marked “Uses less fabric”. Seams run lengthwise: 4 ⅜ yd, 2 panels. Below, the working is shown step by step.

Maths you can check

Every result lists its steps in plain English: the panels and seams, the strips, the extra you added, and how it was rounded.

If something ever looks wrong, one tap emails us the details.

Your numbers, your way

Any strip width (1.5" included). Your seam allowance, ¼" or ⅜" or your own. A little extra for shrinkage or crooked cuts. Buy in metres and sew in inches? Mix them.

Just a calculator

No ads. No account. No shop inside. The calculators work offline, so they're handy at the cutting table and at the fabric counter.

Screenshot captioned “Any strip width. Even 1.5″”: the Binding calculator with Bias cut, 10″ extra length and 42″ fabric. Binding fabric: ⅝ yard. Binding length needed: 270″ (7 ½ yd). Cut 1 ½″ bias strips from a 21″ square.

Screenshot captioned “Buy in metres, sew in inches”: the Borders calculator. Finished quilt 71″ × 81″, 2 borders, 1.4 m in all. Border 1 (inner), 1 ½″ finished: 0.4 m, cut 7 strips 2″ × width of fabric. Border 2 (outer), 4″ finished: 1 m, cut 8 strips 4 ½″ × width of fabric.

What's inside

Free, all of it

Backing: any fabric width, seams across or lengthwise side by side, with the one that uses less fabric first
Batting: the smallest package that fits, or the length to buy off the roll
Binding: any strip width, straight grain or bias
Borders: up to four, butted or mitred corners
Standard quilt sizes from crib to king, or your own
Pieces from yardage, fat quarters and fat eighths, and "how much fabric do I need?"
Block units: half-square triangles, quarter-square triangles, flying geese, square-in-a-square, from finished size to cut size and back
Setting and corner triangles for on-point quilts
Converter: fractions, decimals, centimetres and metres

Pro, one-time purchase Pro

Quilt-top planner: blocks, sashing, cornerstones and up to four borders, giving yardage per fabric and a cutting list
Save your quilts and come back to them
Share a shopping list and cutting list as a PDF

Pro is a single purchase. No subscription. All calculators stay free.

Questions

Is it really free?

Yes. Every calculator is free, with no ads and no time limit. Pro is an optional one-time purchase for planning whole quilts.

Does it need the internet?

No. The calculators work offline. Only buying or restoring Pro needs a connection.

Is there an iPhone version?

No, Quarter Inch is for Android only.

Do I need an account?

No sign-up and no cloud account. Your saved quilts stay on your device, and in your own Android backup if you use it, so they come back when you set up a new phone. We never receive them.

How do you make sure the numbers are right?

Our calculations are checked by automated tests against published quilting charts, and the app shows its working on every answer, so you can check it too. If you find a number you disagree with, email us. Maths fixes come first.

What data does the app collect?

We never ask for your name or email in the app. With the "Share anonymous usage statistics" setting on, Google's Firebase tools count which features are used and send crash reports, so we can fix problems. You can turn that off in Settings. Google Play's billing system also sends its own technical diagnostics. Usage statistics and crash reports never include your measurements or quilt names. Read the full privacy policy.