Kilometer to Picometer Converter

Length Converter

31 units available

Decimals:

From

To

1.000000e+15

1 km = 1.000000e+15 pm

Formula:

pm = km × 1.000000e+15

With your value: 1 km = 1.000000e+15 pm

How big is that?

Everyday references on a logarithmic scale, all expressed in kilometer so you can sanity-check the result.

Olympic pool (1/20 your value)0.0500 km

Football pitch (length) (1/9.5 your value)0.105 km

Eiffel Tower (1/3.0 your value)0.330 km

Burj Khalifa (1/1.2 your value)0.828 km

Your value1.00 km

Marathon (42× your value)42.2 km

Other Kilometer to Picometer conversions

2 km to pm 3 km to pm 4 km to pm 5 km to pm 6 km to pm 7 km to pm 8 km to pm

Kilometer to Picometer Conversion Table

Kilometer (km)	Picometer (pm)
0.5	5.000000e+14
1	1.000000e+15
2	2.000000e+15
5	5.000000e+15
10	1.000000e+16
15	1.500000e+16
20	2.000000e+16
25	2.500000e+16
50	5.000000e+16
100	1.000000e+17
250	2.500000e+17
500	5.000000e+17
1000	1.000000e+18

Picometer to Kilometer Conversion Table

Picometer (pm)	Kilometer (km)
0.5	5.000000e-16
1	1.000000e-15
2	2.000000e-15
5	5.000000e-15
10	1.000000e-14
15	1.500000e-14
20	2.000000e-14
25	2.500000e-14
50	5.000000e-14
100	1.000000e-13
250	2.500000e-13
500	5.000000e-13
1000	1.000000e-12

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Kilometer (km)

Length

Exact conversion

Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

Picometer (pm)

Length

Exact conversion

Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Kilometer to Picometer

To convert from Kilometer (km) to Picometer (pm), multiply the value by 1.000000e+15.

Formula: pm = km × 1.000000e+15

Reverse: km = pm × 1.000000e-15

Step-by-Step Example

Start with your value in Kilometer. For example: 5 km
Multiply by the conversion factor: 5 x 1.000000e+15
The result is: 5.000000e+15 pm

About Kilometer

The kilometer equals 1,000 meters and is the standard unit for measuring distances between geographical locations in most countries.

Fun Fact: The circumference of Earth is approximately 40,075 km.

Common uses: road distances, geography, running.

About Picometer

The picometer (pm) is a unit of distance and length. One picometer equals 1.000000 × 10^-12 metres. UnitConvertLab converts it against every other length unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: length calculations, engineering and science, education.

Frequently Asked Questions

How many Picometer are in 1 Kilometer?

There are exactly 1.000000e+15 Picometer in 1 Kilometer. This means the conversion factor from Kilometer to Picometer is 1.000000e+15.

What is the formula to convert Kilometer to Picometer?

The formula to convert Kilometer to Picometer is: pm = km × 1.000000e+15. For example, to convert 10 Kilometer to Picometer, you would multiply 10 by 1.000000e+15.

What is a Kilometer?