#unit-conversion
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cm to inches: exact formula, height & screen charts (2026)
Convert cm to inches (centimeters to inches) with the exact 1 in = 2.54 cm factor. Mental-math, height, screen, paper charts plus code. Free in browser.
ml to oz: US & UK fluid ounce formulas, charts (2026)
Convert ml to fl oz with exact NIST factors. US (29.5735), UK (28.4131), FDA label 30 mL rounding. Try the free volume converter in your browser.
kg to lbs: NIST formula, mental math and quick charts (2026)
Convert kilograms to pounds with the NIST-exact factor (1 kg = 2.20462 lb). Mental-math tricks, body-weight, luggage and medical-dose charts. Free.
Temperature Conversion Formulas: Celsius, Fahrenheit, Kelvin
Exact temperature conversion formulas for Celsius, Fahrenheit, Kelvin and Rankine with code in 5 languages, weather API patterns, common pitfalls and reference tables.
Unit Conversion Guide: Length, Weight, Temperature & Volume
Metric-to-imperial conversion with exact formulas, code examples & quick-reference tables for length, weight, temperature and volume.