No upload · No signup · FreeAccurate little tools
Accurate little tools
that just work.
Small, accurate tools for everyday conversions. Built to be fast, private, and effortless.
Private by design Instant results Always up to date
★ Popular tools
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Japanese Shoe Size Converter
Convert Japanese (cm) shoe sizes to US, UK & EU — for men and women.
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HEIC to JPG / PNG / PDF
Convert iPhone HEIC photos in your browser — nothing is uploaded.
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Paper Weight Converter (GSM ↔ lb)
GSM to US pounds by category — 80 lb Cover ≠ 80 lb Text. Exact & instant.
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Yarn Weight Converter
Ply ↔ US weight ↔ WPI (CYC standard) for knit & crochet.
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International Ring Size Converter
US ↔ UK ↔ EU ↔ Japan ↔ mm. Exact diameter & circumference (ISO 8653).
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Knitting Needle & Crochet Hook Sizes
Needle & hook sizes across mm, US and UK — pairs with the yarn converter.
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Oven Temperature Converter
°C ↔ °F ↔ Gas Mark ↔ fan oven. 180°C = 350°F = Gas Mark 4.
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Fabric Weight Converter
GSM ↔ oz/yd² (exact). T-shirt & denim weight guide.
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Glove Size Converter
Hand circumference → US / EU / S-XL glove size.
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Tire Size Calculator
Tire size (e.g. 225/45R17) → diameter, sidewall, circumference & revs/mile in inches & mm.
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Butter Converter
Butter between sticks, grams, cups, tablespoons & ounces — exact US-stick math.
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Coming soon
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Drill Bit Size Converter
mm / inch / fractional / number / letter + tap drill.