Numbers
Unit Conversion Reference
Used by developers, writers, and creators worldwide.
A unit conversion reference generator gives you common conversions between metric and imperial units, each with its exact or rounded factor, so you can convert without hunting through a search engine. Choose how many you want and it returns a shuffled set — inches to centimetres, miles to kilometres, kilograms to pounds, Celsius to Fahrenheit. Students, travellers, cooks, and anyone working across measurement systems use it as a quick reference or to build a cheat sheet. Each entry gives the conversion and notes when a factor is exact rather than rounded, which matters for precise work. Pick the conversions you use most, jot them on a card or into a note, and you have a personal reference that beats reaching for a converter every time. Knowing a handful of key factors covers most everyday conversions on the spot.
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How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Choose how many conversions you want.
- Generate a set of the units you use.
- Note which factors are exact.
- Save your most-used ones as a cheat sheet.
Use Cases
- •Converting between metric and imperial fast
- •Building a measurement cheat sheet
- •Helping with travel or cooking
- •Teaching unit conversion
- •Looking up a factor without a converter
Tips
- →Memorise a few key factors for instant use.
- →Note exact versus rounded for precise work.
- →Learn the two temperature formulas together.
- →Keep a personal card of your common conversions.
FAQ
which factors are exact
Some are defined exactly — an inch is exactly 2.54 cm, a foot 30.48 cm, a nautical mile 1.852 km. Others, like kg to pounds, are rounded for everyday use.
how do i convert temperature
Celsius to Fahrenheit: multiply by 9/5 and add 32. Fahrenheit to Celsius: subtract 32 and multiply by 5/9. The two formulas are exact inverses of each other.
should i memorise these
A few key ones cover most needs — 2.54 cm to the inch, roughly 1.6 km to the mile, about 2.2 pounds to the kilo. Knowing those handles everyday conversions instantly.
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