Edit either value. Decimals and scientific notation supported.
1
in
Decimal
Feet + inches
Whole feet; inches from 0 to less than 12. Non-negative values.
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Metrem
Kilometrekm
Centimetrecm
Millimetremm
Micrometreµm
Nanometrenm
Inchin
Footft
Yardyd
Milemi
Nautical milenmi
Chainch
Furlongfur
No units found. Try a name or symbol.
Feet + inches
0.0000254
km
Decimal
Feet + inches
Whole feet; inches from 0 to less than 12. Non-negative values.
esc
Metrem
Kilometrekm
Centimetrecm
Millimetremm
Micrometreµm
Nanometrenm
Inchin
Footft
Yardyd
Milemi
Nautical milenmi
Chainch
Furlongfur
No units found. Try a name or symbol.
Feet + inches
CONVERSION
1 in ≈ 0.0000254 km
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAkm = in × 0.0000254
FORMULA & EXAMPLES
How to convert Inches to kilometres
km = in × 0.0000254
Multiply the in reading by 0.0000254.
Worked examples
0.5 in ≈ 0.0000127 km
0.5 × 0.0000254 ≈ 0.0000127
12 in ≈ 0.0003048 km
12 × 0.0000254 ≈ 0.0003048
Frequently asked questions
How do decimal inches relate to ruler fractions?
A decimal inch is a fraction of one inch: 0.5 is 1/2 inch and 0.25 is 1/4 inch. This tool keeps decimal results rather than rounding them automatically to ruler marks.
Inches to kilometres table
Fixed reference · Inch to Kilometre
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
Inch (in)
Kilometre (km)
0
0
0.1
0.00000254
0.5
0.0000127
1
0.0000254
2
0.0000508
5
0.000127
10
0.000254
25
0.000635
50
0.00127
100
0.00254
1000
0.0254
Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.