Kiloton of TNT to Megajoule Converter

Energy Converter

27 units available

Decimals:

From

To

4,184,000

1 ktTNT = 4,184,000 MJ

Formula:

MJ = ktTNT × 4,184,000

With your value: 1 ktTNT = 4,184,000 MJ

How big is that?

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

Heartbeat (1/4.2e+12 your value)2.39e-13 ktTNT

AA battery charge (1/4.2e+8 your value)2.39e-9 ktTNT

Slice of bread (1/1.5e+7 your value)6.69e-8 ktTNT

Daily food intake (1/5.0e+5 your value)0.00000201 ktTNT

Litre of petrol (1/1.2e+5 your value)0.00000817 ktTNT

Your value1.00 ktTNT

Other Kiloton of TNT to Megajoule conversions

2 ktTNT to MJ 3 ktTNT to MJ 4 ktTNT to MJ 5 ktTNT to MJ 6 ktTNT to MJ 7 ktTNT to MJ 8 ktTNT to MJ

Kiloton of TNT to Megajoule Conversion Table

Kiloton of TNT (ktTNT)	Megajoule (MJ)
0.5	2,092,000
1	4,184,000
2	8,368,000
5	20,920,000
10	41,840,000
15	62,760,000
20	83,680,000
25	104,600,000
50	209,200,000
100	418,400,000
250	1,046,000,000
500	2,092,000,000
1000	4,184,000,000

Megajoule to Kiloton of TNT Conversion Table

Megajoule (MJ)	Kiloton of TNT (ktTNT)
0.5	1.195029e-7
1	2.390057e-7
2	4.780115e-7
5	1.195029e-6
10	2.390057e-6
15	3.585086e-6
20	4.780115e-6
25	5.975143e-6
50	1.195029e-5
100	2.390057e-5
250	5.975143e-5
500	0.00012
1000	0.000239

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.

Kiloton of TNT (ktTNT)

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

Megajoule (MJ)

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 Kiloton of TNT to Megajoule

To convert from Kiloton of TNT (ktTNT) to Megajoule (MJ), multiply the value by 4,184,000.

Formula: MJ = ktTNT × 4,184,000

Reverse: ktTNT = MJ × 2.390057e-7

Step-by-Step Example

Start with your value in Kiloton of TNT. For example: 5 ktTNT
Multiply by the conversion factor: 5 x 4,184,000
The result is: 20,920,000 MJ

About Kiloton of TNT

The kiloton of tnt (ktTNT) is a unit of energy and work. One kiloton of tnt equals 4.184000 × 10^+12 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 Megajoule

The megajoule (MJ) is a unit of energy and work. One megajoule equals 1.000000 × 10^+6 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 Megajoule are in 1 Kiloton of TNT?

There are exactly 4,184,000 Megajoule in 1 Kiloton of TNT. This means the conversion factor from Kiloton of TNT to Megajoule is 4,184,000.

What is the formula to convert Kiloton of TNT to Megajoule?

The formula to convert Kiloton of TNT to Megajoule is: MJ = ktTNT × 4,184,000. For example, to convert 10 Kiloton of TNT to Megajoule, you would multiply 10 by 4,184,000.

What is a Kiloton of TNT?