Hobby and Craft

  • Acrylic Paint Coverage Calculator
    Estimate how much area your acrylic paint covers from mL and coverage per mL. Adjusts for multiple coats. Great for paint-by-numbers and craft projects.
  • Golden Ratio Design Calculator
    Split any total length into golden-ratio proportions (φ ≈ 1.618). Get the larger and smaller segments instantly for design, layout and typography.
  • Cut Fabric Size Calculator (Add Seam Allowance)
    Calculate the cut fabric size by adding seam allowance to your finished dimensions. Enter finished width, length, and seam allowance per edge.
  • Bracelet Bead Count Calculator
    Calculate how many beads you need for a bracelet based on wrist size, bead diameter, and ease. Free, instant bead count calculator for jewelry makers.
  • Macrame Cord Length Calculator
    Calculate how much macrame cord to cut for your project. Enter finished length, number of cords, and a 4–6× multiplier to get total cord needed.
  • Buttonhole Spacing Calculator
    Calculate even buttonhole spacing for shirts, plackets and garments. Enter length, end margins and button count to get exact center-to-center spacing.
  • Knitting Cast-On Stitches Calculator
    Calculate how many stitches to cast on from your knitting gauge (stitches per 4 inches) and the finished width of your project. Add optional edge stitches.
  • Soap Lye Calculator
    Calculate the exact grams of NaOH lye and water needed for cold-process soap from your oil weight, SAP value, superfat percentage and water ratio.
  • Diamond Painting Drill Count Calculator
    Estimate how many diamond painting drills you need from your canvas size and drill coverage. Calculates total drills, grid cells and bags.
  • Resin Mold Volume Calculator
    Calculate how much resin you need to fill a mold by length, width, depth and fill level. Get volume in mL/L and resin weight in grams.
  • Candle Wax Calculator
    Calculate how much candle wax and fragrance oil you need for any batch. Enter container size, quantity, and fragrance load to plan your pour.
  • WPI Yarn Weight Calculator
    Calculate wraps per inch (WPI) and identify your yarn weight category (lace, fingering, DK, worsted, bulky) from wraps and measured length.
  • Knitting Yarn Yardage Calculator
    Estimate how much yarn and how many skeins you need for your knitting project. Enter dimensions, yards per square inch, and skein length.
  • Crochet Foundation Chain Calculator
    Calculate how many foundation chain stitches to make for any crochet project from your desired width, gauge (stitches per inch), and turning chains.
  • Diamond Carat Calculator
    Estimate the carat weight of a round brilliant diamond from its diameter and depth in millimeters using the standard carat weight formula.
  • Carat Weight Calculator
    Convert between carats and grams instantly. Uses the metric carat (1 ct = 0.2 g = 200 mg) to find gemstone and diamond weight.
  • Salt Dough Calculator
    Calculate the exact flour, salt and water for salt dough using the classic 2:1:1 ratio. Scale up for multiple batches and get total dough weight.
  • NaNoWriMo Word Count Calculator
    Calculate how many words per day you need to win NaNoWriMo. Enter words written, days left, and your goal to stay on pace for 50,000 words.
  • Diamond Weight Calculator
    Estimate a round brilliant diamond's weight in carats from its diameter and depth in millimeters using the standard industry formula.
  • Nether Portal Calculator
    Convert Minecraft coordinates between the Overworld and Nether (1:8 ratio) to perfectly link your portals. Find where to build the paired portal.
  • Minecraft Stack Calculator
    Convert any item count into full Minecraft stacks plus leftovers. Supports 64, 16, and 1 stack sizes. Instantly see stacks and remainder.
  • Delay and Reverb Time Calculator
    Calculate delay and reverb time in milliseconds from your song's BPM and note value. Get straight, dotted, and triplet delay times plus the matching frequency.
  • Time Lapse Calculator
    Calculate time-lapse clip length, total frames and shooting time from your interval and playback frame rate. Free, instant photography planner.
  • Shutter Speed Calculator
    Calculate a new shutter speed from EV changes, aperture and ISO stops using reciprocity. Get the equivalent 1/x fraction instantly for photography.

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