Megaton of TNT to Calorie (th) Converter

Energy Converter

27 units available

Decimals:

From

To

1.000000e+15

1 MtTNT = 1.000000e+15 cal

Formula:

cal = MtTNT × 1.000000e+15

With your value: 1 MtTNT = 1.000000e+15 cal

How big is that?

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

Heartbeat (1/4.2e+15 your value)2.39e-16 MtTNT

AA battery charge (1/4.2e+11 your value)2.39e-12 MtTNT

Slice of bread (1/1.5e+10 your value)6.69e-11 MtTNT

Daily food intake (1/5.0e+8 your value)2.01e-9 MtTNT

Litre of petrol (1/1.2e+8 your value)8.17e-9 MtTNT

Your value1.00 MtTNT

Other Megaton of TNT to Calorie (th) conversions

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

Megaton of TNT to Calorie (th) Conversion Table

Megaton of TNT (MtTNT)	Calorie (th) (cal)
0.5	5.000000e+14
1	1.000000e+15
2	2.000000e+15
5	5.000000e+15
10	1.000000e+16
15	1.500000e+16
20	2.000000e+16
25	2.500000e+16
50	5.000000e+16
100	1.000000e+17
250	2.500000e+17
500	5.000000e+17
1000	1.000000e+18

Calorie (th) to Megaton of TNT Conversion Table

Calorie (th) (cal)	Megaton of TNT (MtTNT)
0.5	5.000000e-16
1	1.000000e-15
2	2.000000e-15
5	5.000000e-15
10	1.000000e-14
15	1.500000e-14
20	2.000000e-14
25	2.500000e-14
50	5.000000e-14
100	1.000000e-13
250	2.500000e-13
500	5.000000e-13
1000	1.000000e-12

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.

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

Calorie (th) (cal)

Energy

Exact conversion

The thermochemical calorie is exactly 4.184 J.

The International Table calorie (4.1868 J) and the 15 °C calorie differ slightly.

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 Megaton of TNT to Calorie (th)

To convert from Megaton of TNT (MtTNT) to Calorie (th) (cal), multiply the value by 1.000000e+15.

Formula: cal = MtTNT × 1.000000e+15

Reverse: MtTNT = cal × 1.000000e-15

Step-by-Step Example

Start with your value in Megaton of TNT. For example: 5 MtTNT
Multiply by the conversion factor: 5 x 1.000000e+15
The result is: 5.000000e+15 cal

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.

About Calorie (th)

The thermochemical calorie equals 4.184 joules. Not to be confused with the food Calorie (kcal), which equals 1,000 calories.

Common uses: chemistry, nutrition, heating.

Frequently Asked Questions

How many Calorie (th) are in 1 Megaton of TNT?

There are exactly 1.000000e+15 Calorie (th) in 1 Megaton of TNT. This means the conversion factor from Megaton of TNT to Calorie (th) is 1.000000e+15.

What is the formula to convert Megaton of TNT to Calorie (th)?

The formula to convert Megaton of TNT to Calorie (th) is: cal = MtTNT × 1.000000e+15. For example, to convert 10 Megaton of TNT to Calorie (th), you would multiply 10 by 1.000000e+15.

What is a Megaton of TNT?