EVERYDAY
Area
Surface, land and cross-sectional area.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result1e-34 km²1 b = 1e-34 km²
EVERYDAY · ENGINEERING · SCIENCE
b to km² Converter
Convert barn (b) to square kilometre (km²). Enter a value for an instant result, or use the examples and reverse conversion below.
520units ready to convert
HOW IT IS CALCULATED
Convert through square metre
Enter a barn value to calculate square kilometre with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| square micrometrefrom b | µm² | 1e-16 |
| square millimetrefrom b | mm² | 1e-22 |
| square centimetrefrom b | cm² | 1e-24 |
| square decimetrefrom b | dm² | 1e-26 |
| square metrefrom b | m² | 1e-28 |
| arefrom b | a | 1e-30 |
| hectarefrom b | ha | 1e-32 |
| square kilometrefrom b | km² | 1e-34 |
| square inchfrom b | in² | 1.55e-25 |
| square footfrom b | ft² | 1.07639e-27 |
| square yardfrom b | yd² | 1.19599e-28 |
| acrefrom b | acre | 2.47105e-32 |
| square milefrom b | mi² | 3.86102e-35 |
| barnfrom b | b | 1 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
b to km² Conversion Reference
Barn (b) and square kilometre (km²) are units of area. Use this page to convert in either direction.
Conversion Examples
| Barn (b) | Square Kilometre (km²) |
|---|---|
| 1 b | 1e-34 km² |
| 5 b | 5e-34 km² |
| 10 b | 1e-33 km² |
| 100 b | 1e-32 km² |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
km² to b (square kilometre to barn)
Related Area Conversions
b to µm² (barn to square micrometre)b to mm² (barn to square millimetre)b to cm² (barn to square centimetre)b to dm² (barn to square decimetre)b to m² (barn to square metre)b to a (barn to are)b to ha (barn to hectare)b to in² (barn to square inch)b to ft² (barn to square foot)b to yd² (barn to square yard)b to acre (barn to acre)b to mi² (barn to square mile)