Rydberg to Electron Volt Converter

Energy Converter

27 units available

Decimals:

From

To

13.605691

1 Ry = 13.605691 eV

Formula:

eV = Ry × 13.6056908692

With your value: 1 Ry = 13.60569087 eV

How big is that?

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

Your value1.00 Ry

Heartbeat (4.6e+17× your value)4.59e+17 Ry

AA battery charge (4.6e+21× your value)4.59e+21 Ry

Slice of bread (1.3e+23× your value)1.28e+23 Ry

Daily food intake (3.9e+24× your value)3.85e+24 Ry

Litre of petrol (1.6e+25× your value)1.57e+25 Ry

Other Rydberg to Electron Volt conversions

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

Rydberg to Electron Volt Conversion Table

Rydberg (Ry)	Electron Volt (eV)
0.5	6.802845
1	13.605691
2	27.211382
5	68.028454
10	136.056909
15	204.085363
20	272.113817
25	340.142272
50	680.284543
100	1,360.569087
250	3,401.422717
500	6,802.845435
1000	13,605.690869

Electron Volt to Rydberg Conversion Table

Electron Volt (eV)	Rydberg (Ry)
0.5	0.036749
1	0.073499
2	0.146997
5	0.367493
10	0.734987
15	1.10248
20	1.469973
25	1.837466
50	3.674933
100	7.349866
250	18.374664
500	36.749328
1000	73.498657

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.

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

Electron Volt (eV)

Energy

Exact conversion

1 eV = 1.602 176 634 × 10⁻¹⁹ J exactly, since the elementary charge is now fixed.

Source: CODATA Internationally Recommended Values of the Fundamental Physical Constants (2022 adjustment)

CODATA / NIST · Reviewed 2026-07-01

How to Convert Rydberg to Electron Volt

To convert from Rydberg (Ry) to Electron Volt (eV), multiply the value by 13.6056908692.

Formula: eV = Ry × 13.6056908692

Reverse: Ry = eV × 0.0734986565

Step-by-Step Example

Start with your value in Rydberg. For example: 5 Ry
Multiply by the conversion factor: 5 x 13.6056908692
The result is: 68.028454 eV

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.

About Electron Volt

The electron volt (eV) is a unit of energy and work. One electron volt equals 1.602177 × 10^-19 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 Electron Volt are in 1 Rydberg?

There are exactly 13.6056908692 Electron Volt in 1 Rydberg. This means the conversion factor from Rydberg to Electron Volt is 13.6056908692.

What is the formula to convert Rydberg to Electron Volt?

The formula to convert Rydberg to Electron Volt is: eV = Ry × 13.6056908692. For example, to convert 10 Rydberg to Electron Volt, you would multiply 10 by 13.6056908692.

What is a Rydberg?