Kiloelectron Volt to Rydberg Converter

Energy Converter

27 units available

Decimals:

From

To

73.498657

1 keV = 73.498657 Ry

Formula:

Ry = keV × 73.4986565266

With your value: 1 keV = 73.49865653 Ry

How big is that?

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

Your value1.00 keV

Heartbeat (6.2e+15× your value)6.24e+15 keV

AA battery charge (6.2e+19× your value)6.24e+19 keV

Slice of bread (1.7e+21× your value)1.75e+21 keV

Daily food intake (5.2e+22× your value)5.24e+22 keV

Litre of petrol (2.1e+23× your value)2.13e+23 keV

Other Kiloelectron Volt to Rydberg conversions

2 keV to Ry 3 keV to Ry 4 keV to Ry 5 keV to Ry 6 keV to Ry 7 keV to Ry 8 keV to Ry

Kiloelectron Volt to Rydberg Conversion Table

Kiloelectron Volt (keV)	Rydberg (Ry)
0.5	36.749328
1	73.498657
2	146.997313
5	367.493283
10	734.986565
15	1,102.479848
20	1,469.973131
25	1,837.466413
50	3,674.932826
100	7,349.865653
250	18,374.664132
500	36,749.328263
1000	73,498.656527

Rydberg to Kiloelectron Volt Conversion Table

Rydberg (Ry)	Kiloelectron Volt (keV)
0.5	0.006803
1	0.013606
2	0.027211
5	0.068028
10	0.136057
15	0.204085
20	0.272114
25	0.340142
50	0.680285
100	1.360569
250	3.401423
500	6.802845
1000	13.605691

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.

Kiloelectron Volt (keV)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Rydberg (Ry)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Kiloelectron Volt to Rydberg

To convert from Kiloelectron Volt (keV) to Rydberg (Ry), multiply the value by 73.4986565266.

Formula: Ry = keV × 73.4986565266

Reverse: keV = Ry × 0.0136056909

Step-by-Step Example

Start with your value in Kiloelectron Volt. For example: 5 keV
Multiply by the conversion factor: 5 x 73.4986565266
The result is: 367.493283 Ry

About Kiloelectron Volt

The kiloelectron volt (keV) is a unit of energy and work. One kiloelectron volt equals 1.602177 × 10^-16 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

About Rydberg

The rydberg (Ry) is a unit of energy and work. One rydberg equals 2.179872 × 10^-18 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

Frequently Asked Questions

How many Rydberg are in 1 Kiloelectron Volt?

There are exactly 73.4986565266 Rydberg in 1 Kiloelectron Volt. This means the conversion factor from Kiloelectron Volt to Rydberg is 73.4986565266.

What is the formula to convert Kiloelectron Volt to Rydberg?

The formula to convert Kiloelectron Volt to Rydberg is: Ry = keV × 73.4986565266. For example, to convert 10 Kiloelectron Volt to Rydberg, you would multiply 10 by 73.4986565266.

What is a Kiloelectron Volt?