TNT Equivalent Calculator

TNT Equivalent Energy

Explosive yields are often expressed as an equivalent mass of TNT. This convention lets scientists compare nuclear blasts, chemical explosions, and asteroid impacts on a common energy scale.

Conversion Standard

$$E_{\text{TNT}} = \frac{E}{4.184 \times 10^9 \text{ J/ton}}$$

One metric ton of TNT releases approximately 4.184 gigajoules of energy. Results are shown in tons of TNT and kilotons (kt), where 1 kt equals 1000 tons of TNT.

Scale Examples

The Hiroshima bomb was about 15 kt. Large conventional bombs are measured in tons of TNT. Nuclear warheads range from kilotons to megatons. This tool accepts joules, kilojoules, megajoules, and kilocalories as input.

Frequently Asked Questions

How much energy is in one ton of TNT?

One metric ton of TNT is defined as 4.184 gigajoules (4.184 × 10⁹ joules). This is a conventional standard, not a precise chemical measurement.

What is the difference between tons and kilotons?

One kiloton (kt) equals 1000 tons of TNT equivalent. A 20 kt explosion releases energy equal to 20,000 tons of TNT.

Can I enter energy in calories?

Yes. Select kilocalories (kcal) as the unit. One food calorie equals one kilocalorie, which is 4184 joules.

Is TNT equivalent the same as explosive mass?

No. TNT equivalent is an energy comparison. A 1-ton TNT equivalent blast does not require 1 ton of actual TNT if a more powerful explosive is used.

Why use 4.184 GJ per ton?

This value is the internationally accepted convention for comparing explosive and nuclear yields. It provides a consistent reference even when the actual explosive chemistry differs.

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TNT Equivalent

TNT Equivalent Energy

Conversion Standard

Scale Examples

Frequently Asked Questions

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