UnitRatio shows the exact formula behind every conversion — 1 lb = 0.45359237 kg, 1 in = 25.4 mm — step-by-step working, zero guesswork.
Quick convert
75 × 2.2046226218488 = 165.3466966 lb
See the exact formula: 1 kg × 2.2046226218488 → lb · Source: BIPM SI Brochure, 9th ed.
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The conversions people actually need, two taps away.
Cups, tablespoons, fluid ounces — exact US customary volumes.
cup (US customary) → fluid ounce (US)
1 × 8 = 8 fl oz
See the exact formula: 1 cup × 8 → fl oz · Source: NIST Handbook 44 / NIST SP 811.
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1 cup = 236.5882365 ml
Kilograms to pounds with the international avoirdupois pound.
kilogram → pound (avoirdupois)
75 × 2.2046226218488 = 165.3466966 lb
See the exact formula: 1 kg × 2.2046226218488 → lb · Source: BIPM SI Brochure, 9th ed.
Enter accepts · paste works · your locale decimal format is understood
1 lb = 0.45359237 kg
Inches, centimeters, feet — international inch = 25.4 mm.
centimeter → inch
30 × 0.39370078740157 = 11.81102362 in
See the exact formula: 1 cm × 0.39370078740157 → in · Source: BIPM SI Brochure, 9th ed.（1 cm = 0.01 m）.
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1 in = 2.54 cm (exact)
ECB reference rates, refreshed daily — with the data date always in view.
Every result shows its working — because trust is a feature.
Every factor is an international exact value — 1 lb = 0.45359237 kg, not a rounded approximation. Sources: NIST, BIPM.
Every result shows the coefficient, the multiplication and the result — audit the number yourself, steps printable.
Locale-aware parsing and display: 1,234.5 or 1.234,5 both work, and output follows your region.
Yes. Every factor is an international exact value — for example the pound is defined as exactly 0.45359237 kg and the inch as exactly 25.4 mm. Each page names its source (NIST, BIPM).
Multiply kilograms by 2.2046226218488. Use the kg to lbs converter, which also shows the calculation steps and a conversion table.
Currency rates are seed data dated 2026-11-04 from the European Central Bank via frankfurter.app. The page always shows its data date, and a daily auto-refresh is scheduled for phase 2.