Interactive Maker Utilities
Free Crochet Craft Tools & Calculators
Interactive calculators, row counters, size converters, and planning tools engineered specifically for yarn crafters. 100% offline-ready.
Calculator/tools/blanket-calculator
Blanket Calculator
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Blanket Dimension Calculator
Estimate starting chain stitches & total rows for standard mattress afghans.
Calculated Specifications (Worsted Yarn & 5mm Hook)
Starting Chain Stitches
175 sts
Total Rows Needed
150 rows
Crochet Blanket Size Calculator — Starting Chains, Rows & Bed Dimensions
Calculate starting chains, row counts, and yarn estimates for baby blankets, lapghans, throws, and king beds.
Crochet Blanket Size Calculator - Chain Count, Rows & Mattress Dimensions
Crocheting a blanket that fits standard bed mattresses or stroller dimensions requires knowing exact chain counts, row counts, and yardage. Use our blanket dimension calculator to plan your afghans accurately.
Standard Crochet Blanket Dimensions Reference Chart
| Blanket Style / Size | Width × Length (Inches) | Width × Length (cm) | Starting Chain (Worsted #4, 5mm) | Average Rows |
|---|---|---|---|---|
| Lovey / Security Blanket | 14" × 14" | 35 × 35 cm | 45 - 50 ch | 35 rows |
| Stroller / Car Seat | 24" × 30" | 60 × 75 cm | 80 - 85 ch | 70 rows |
| Receiving Baby Blanket | 30" × 35" | 75 × 90 cm | 105 - 110 ch | 85 rows |
| Toddler / Crib Mattress | 36" × 54" | 90 × 135 cm | 125 - 130 ch | 130 rows |
| Lapghan / Wheelchair Throw | 40" × 48" | 100 × 120 cm | 140 - 145 ch | 115 rows |
| Standard Living Room Throw | 50" × 60" | 125 × 150 cm | 175 - 180 ch | 145 rows |
| Twin Bed Blanket | 66" × 90" | 165 × 230 cm | 230 - 235 ch | 215 rows |
| Full / Double Bed | 80" × 90" | 200 × 230 cm | 280 - 285 ch | 215 rows |
| Queen Bed Blanket | 90" × 95" | 230 × 240 cm | 315 - 320 ch | 230 rows |
| King Bed Blanket | 108" × 95" | 275 × 240 cm | 380 - 385 ch | 230 rows |
How to Adjust for Different Yarn Weights
- Bulky Yarn (#5) with 6.5mm hook: Multiply target width in inches by 2.5 for your starting chain.
- Super Bulky (#6) with 9mm hook: Multiply target width in inches by 1.8 for your starting chain.
- DK Yarn (#3) with 4mm hook: Multiply target width in inches by 4.5 for your starting chain.