Erg to BTU (th) Converter

Energy Converter

27 units available

Decimals:

From

To

9.484517e-11

1 erg = 9.484517e-11 BTU

Formula:

BTU = erg × 9.484517e-11

With your value: 1 erg = 9.484517e-11 BTU

How big is that?

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

Your value1.00 erg

Heartbeat (1.0e+7× your value)1.00e+7 erg

AA battery charge (1.0e+11× your value)1.00e+11 erg

Slice of bread (2.8e+12× your value)2.80e+12 erg

Daily food intake (8.4e+13× your value)8.40e+13 erg

Litre of petrol (3.4e+14× your value)3.42e+14 erg

Other Erg to BTU (th) conversions

2 erg to BTU 3 erg to BTU 4 erg to BTU 5 erg to BTU 6 erg to BTU 7 erg to BTU 8 erg to BTU

Erg to BTU (th) Conversion Table

Erg (erg)	BTU (th) (BTU)
0.5	4.742258e-11
1	9.484517e-11
2	1.896903e-10
5	4.742258e-10
10	9.484517e-10
15	1.422677e-9
20	1.896903e-9
25	2.371129e-9
50	4.742258e-9
100	9.484517e-9
250	2.371129e-8
500	4.742258e-8
1000	9.484517e-8

BTU (th) to Erg Conversion Table

BTU (th) (BTU)	Erg (erg)
0.5	5,271,750,000
1	10,543,500,000
2	21,087,000,000
5	52,717,500,000
10	105,435,000,000
15	158,152,499,999.99997
20	210,870,000,000
25	263,587,499,999.99997
50	527,174,999,999.99994
100	1.054350e+12
250	2.635875e+12
500	5.271750e+12
1000	1.054350e+13

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.

Erg (erg)

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

BTU (th) (BTU)

Energy

Exact conversion

The International Table BTU is exactly 1055.055 852 62 J.

Thermochemical and 39 °F BTU definitions differ by up to 0.2 %.

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 Erg to BTU (th)

To convert from Erg (erg) to BTU (th) (BTU), multiply the value by 9.484517e-11.

Formula: BTU = erg × 9.484517e-11

Reverse: erg = BTU × 1.054350e+10

Step-by-Step Example

Start with your value in Erg. For example: 5 erg
Multiply by the conversion factor: 5 x 9.484517e-11
The result is: 4.742258e-10 BTU

About Erg

The erg (erg) is a unit of energy and work. One erg equals 1.000000 × 10^-7 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 BTU (th)

The btu (th) (BTU) is a unit of energy and work. One btu (th) equals 1054.35 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 BTU (th) are in 1 Erg?

There are exactly 9.484517e-11 BTU (th) in 1 Erg. This means the conversion factor from Erg to BTU (th) is 9.484517e-11.

What is the formula to convert Erg to BTU (th)?

The formula to convert Erg to BTU (th) is: BTU = erg × 9.484517e-11. For example, to convert 10 Erg to BTU (th), you would multiply 10 by 9.484517e-11.

What is a Erg?