Crochet Row Count Calculator
Rows per inch = the rows you counted divided by the swatch height. Use that gauge to plan a flat piece, then round to a complete row repeat and check its actual height.
No account needed. Calculations stay in your browser.
Enter values from 0 to 1,000,000,000. Positive measurements must be at least 0.001; stitch counts and repeats must be whole numbers.
- Rows per inch
- 3
- Unrounded rows
- 120
- Complete repeats
- 30
- Rows to work
- 120
- Height at this gauge
- 40 in
- Difference from target
- 0 in
How the calculation works
Multiply target height by rows per inch for the unrounded row count. Divide by the repeat length and round to the nearest positive whole repeat. Multiply that count by the repeat length for rows to work. Actual height = planned rows ÷ rows per inch.
Worked example
A swatch has 12 rows across 4 inches of height: 3 rows per inch. A 40-inch target needs 120 rows, or 30 complete repeats of 4 rows. For 41 inches, the nearest repeat gives 124 rows and about 41.333 inches.
Check before you start
Use a blocked swatch made with the same stitch pattern. Count worked rows, not the starting chain or turning chains. A turning chain lifts the next row; it is not an extra row. This tool excludes borders, shaping and foundation rows outside the repeat. Row gauge can change with tension. Check the piece as it grows.
These calculations use the dimensions you enter and the stated layout rules. They do not measure fabric shrinkage, yarn tension or your working pace.
Next steps
- How Many Chains for a Crochet Blanket?
- US vs UK Crochet Terms (and How to Read a Pattern)
- What Size Crochet Hook for Worsted Yarn?
- Open the crochet pattern generator
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