Therm to Megaton of TNT Converter

Energy Converter

27 units available

Decimals:

From

To

2.521644e-8

1 thm = 2.521644e-8 MtTNT

Formula:

MtTNT = thm × 2.521644e-8

With your value: 1 thm = 2.521644e-8 MtTNT

How big is that?

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

Heartbeat (1/1.1e+8 your value)9.48e-9 thm

AA battery charge (1/1.1e+4 your value)0.0000948 thm

Slice of bread (1/3.8e+2 your value)0.00265 thm

Daily food intake (1/13 your value)0.0796 thm

Litre of petrol (1/3.1 your value)0.324 thm

Your value1.00 thm

Other Therm to Megaton of TNT conversions

2 thm to MtTNT 3 thm to MtTNT 4 thm to MtTNT 5 thm to MtTNT 6 thm to MtTNT 7 thm to MtTNT 8 thm to MtTNT

Therm to Megaton of TNT Conversion Table

Therm (thm)	Megaton of TNT (MtTNT)
0.5	1.260822e-8
1	2.521644e-8
2	5.043288e-8
5	1.260822e-7
10	2.521644e-7
15	3.782466e-7
20	5.043288e-7
25	6.304110e-7
50	1.260822e-6
100	2.521644e-6
250	6.304110e-6
500	1.260822e-5
1000	2.521644e-5

Megaton of TNT to Therm Conversion Table

Megaton of TNT (MtTNT)	Therm (thm)
0.5	19,828,334.156955
1	39,656,668.313909
2	79,313,336.627818
5	198,283,341.569546
10	396,566,683.139092
15	594,850,024.708638
20	793,133,366.278184
25	991,416,707.84773
50	1,982,833,415.69546
100	3,965,666,831.390919
250	9,914,167,078.477299
500	19,828,334,156.954597
1000	39,656,668,313.909195

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.

Therm (thm)

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

Megaton of TNT (MtTNT)

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 Therm to Megaton of TNT

To convert from Therm (thm) to Megaton of TNT (MtTNT), multiply the value by 2.521644e-8.

Formula: MtTNT = thm × 2.521644e-8

Reverse: thm = MtTNT × 39,656,668.313909195

Step-by-Step Example

Start with your value in Therm. For example: 5 thm
Multiply by the conversion factor: 5 x 2.521644e-8
The result is: 1.260822e-7 MtTNT

About Therm

The therm (thm) is a unit of energy and work. One therm equals 1.055056 × 10^+8 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 Megaton of TNT

The megaton of tnt (MtTNT) is a unit of energy and work. One megaton of tnt equals 4.184000 × 10^+15 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 Megaton of TNT are in 1 Therm?

There are exactly 2.521644e-8 Megaton of TNT in 1 Therm. This means the conversion factor from Therm to Megaton of TNT is 2.521644e-8.

What is the formula to convert Therm to Megaton of TNT?

The formula to convert Therm to Megaton of TNT is: MtTNT = thm × 2.521644e-8. For example, to convert 10 Therm to Megaton of TNT, you would multiply 10 by 2.521644e-8.

What is a Therm?