# R5 | perplexity/sonar-pro | run 2

## Prompt

How many kilometers are in 100 miles? Show the conversion factor and cite a source for it.

## Response

100 miles is **160.934 kilometers** when using the standard exact mile-to-kilometer definition.[UnitConverters](https://www.unitconverters.net/length/miles-to-km.htm) This comes from the exact conversion factor **1 mile = 1.609344 kilometers**.[RapidTables](https://www.rapidtables.com/convert/length/mile-to-km.html?x=100)

## Conversion factor

**Exact conversion factor**

- **1 mile = 1.609344 kilometers**  
  This is the internationally defined relationship between the statute mile and the kilometer.[UnitConverters](https://www.unitconverters.net/length/miles-to-km.htm)[RapidTables](https://www.rapidtables.com/convert/length/mile-to-km.html?x=100)

**Using the factor for 100 miles**

- Formula:  
  \[
  \text{kilometers} = \text{miles} \times 1.609344
  \]
- Calculation for 100 miles:  
  \[
  100 \times 1.609344 = 160.9344 \text{ km}
  \]  
  So **100 miles = 160.9344 km**, often rounded to **160.934 km**.[UnitConverters](https://www.unitconverters.net/length/miles-to-km.htm)[All-Convert](https://all-convert.com/length/mile-to-kilometer/100/)

Some sources quote a rounded factor **1 mile ≈ 1.60934 km**, which gives 100 miles ≈ 160.934 km, practically the same for most everyday uses.[CoolConversion](https://coolconversion.com/length/100-mi-to-km)

Would you like a quick reference table for other common mile-to-kilometer conversions (e.g., 1, 10, 50, 200 miles)?
