Question 1

What are SI prefixes?

Accepted Answer

Multipliers for metric units: kilo (10³), mega (10⁶), giga (10⁹), milli (10⁻³), micro (10⁻⁶), nano (10⁻⁹).

Question 2

How do I convert between SI prefixes?

Accepted Answer

Each step is 10³. Kilo to milli = 6 steps = 10⁶. 5 km = 5 × 10⁶ mm = 5,000,000 mm.

Question 3

How accurate are these calculations?

Accepted Answer

Our calculator uses double-precision floating-point arithmetic, accurate to about 15-16 significant digits for most calculations.

Question 4

Can I use the result in further calculations?

Accepted Answer

Yes, results are calculated to full precision. You can copy the exact value or use the rounded display depending on your needs.

Si Prefix Converter

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