Tools
Stripe & Temperature Blanket Yardage Calculator
Plan a year-long temperature blanket or a custom striped throw before you buy a single skein. Choose your climate or stripe pattern, blanket size, stitch and yarn, and get a to-scale preview plus rows, meters, yards, grams and skeins for every color — summed up as one shopping bundle.
Free · No sign-up · Runs in your browser
- Finished size
- 47 in × 90 in
- Rows
- 365
- Foundation chain
- 175
- Total
- 28 skeins · 10 colors
| Color | Temperature range | Rows | Length · Weight | Weight | Balls |
|---|---|---|---|---|---|
| Color 1 | < 37 °F | 6 | 88 yd35 g | 35 g | 1 |
| Color 2 | 37 – 42 °F | 21 | 307 yd122 g | 122 g | 2 |
| Color 3 | 43 – 47 °F | 43 | 627 yd250 g | 250 g | 3 |
| Color 4 | 48 – 53 °F | 56 | 817 yd325 g | 325 g | 4 |
| Color 5 | 54 – 58 °F | 57 | 831 yd331 g | 331 g | 4 |
| Color 6 | 59 – 63 °F | 57 | 831 yd331 g | 331 g | 4 |
| Color 7 | 64 – 69 °F | 56 | 817 yd325 g | 325 g | 4 |
| Color 8 | 70 – 74 °F | 43 | 627 yd250 g | 250 g | 3 |
| Color 9 | 75 – 80 °F | 20 | 292 yd116 g | 116 g | 2 |
| Color 10 | ≥ 81 °F | 6 | 88 yd35 g | 35 g | 1 |
Total Project Bundle: 28 skeins across 10 colors
CYC 3 – Light yarn
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Temperature mode is an estimate: the average daily high follows a yearly sine curve between your coldest- and warmest-month values with a day-to-day spread of σ = 3.5 °C, and expected days per range are rounded to 365. The climate archetypes are illustrative; type the values for your city for a closer estimate. Yarn: calibrated model of our yarn calculator with the stitch factor and a 10 % margin; squares use the granny-stitch factor.
How it works: the math behind the tool
Temperature mode estimates how many of the 365 days fall into each of your 8–12 temperature ranges. The average daily high is modeled as an annual sine curve between the coldest-month and warmest-month values, and the day-to-day scatter around it as a normal distribution with σ = 3.5 °C; the probability of each range is summed over the year and rounded to exactly 365 days with the largest-remainder method. The six climate types are illustrative archetypes, not station data: type the average highs of your own city (from your national weather service) for a closer estimate.
Stripe mode builds the sequence for you: symmetric (the colors mirror around the center), balanced random (every color gets the same number of rows, shuffled with a fixed seed so the plan is reproducible, and never two equal stripes in a row) or Fibonacci (stripe heights 1, 1, 2, 3, 5, 8 times your base number of rows). Blanket length is converted into rows with your row gauge, and the last repeat is trimmed to fit.
Meters per color = (rows × row height × width) ÷ 100 × 0.82 × √density × stitch factor × 1.10 · Skeins = ⌈meters ÷ meters per skein⌉
Yarn per color uses the same calibrated model as our yarn calculator: meters = area (cm²) ÷ 100 × 0.82 × √(meters per 100 g) × stitch factor (single crochet 1.30, half double 1.15, double crochet 1.00, moss stitch 1.20; granny squares 1.00) plus a 10 % margin. Every color is rounded up to whole skeins separately, because you cannot buy a fraction of a skein in each shade, so the bundle total is usually a little higher than the total meters alone would suggest.
Last updated: November 8, 2026
Frequently asked questions
How much yarn do I need for a temperature blanket?
More than most people expect, because 365 rows make a long blanket. In single crochet with a worsted (CYC 4) yarn at about 14 rows per 10 cm, 365 rows measure about 2.6 m; at 120 cm wide our model gives about 4,800 m, or 34 skeins of 170 m once each of 10 colors is rounded up to whole skeins. A narrower width, a finer yarn or one square per day keeps it smaller.
How many colors should a temperature blanket have?
Most makers use 8 to 12 colors, each covering a band of 3–5 °C (5–10 °F). Fewer colors give bolder stripes; more colors show finer changes but require more skeins, because each color is bought separately. The calculator lets you choose 8 to 12 ranges and see the skein count change.
Is the temperature distribution exact?
No. Without your real daily records it is an estimate from a statistical model (sine-shaped seasons with a normal scatter of 3.5 °C). It is good enough to size your yarn order; for the blanket itself, record the actual daily high each day.
Can I make a temperature blanket with granny squares?
Yes. Choose “one square per day”, set the square size and the number of squares per row, and the calculator gives the finished size, the number of squares of each color and the yarn per color using the granny-stitch factor.