Transistor Density Calculator

Work out transistor density instantly with clear inputs, formula shown and shareable results.

About Transistor Density Calculator

Transistor density is count divided by die area, usually quoted in millions of transistors per square millimetre. It is the honest comparison between processes, because marketing node names no longer correspond to any physical dimension — density figures do.

Formula

Density

density (MTr/mm2) = transistor count / die area / 1e6

Worked example

With the default values below, Transistor Density Calculator returns Transistor density of 57.14. Change any input above and every figure here is recalculated in your browser.

Inputs used

Transistor count: 12 billion
Die area: 210 mm²
Process node: 5 nm

Results

Transistor density: 57.14 MTr/mm²
Area per transistor: 17,500 nm²
Density relative to a 7 nm reference: 0.63 x
Total transistors: 12,000,000,000 transistors

Step by step

1Values used
2Density
3Transistor density= 57.14 MTr/mm²
4Area per transistor= 17,500 nm²
5Density relative to a 7 nm reference= 0.63 x
6Total transistors= 12,000,000,000 transistors

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why is the node name misleading?

Since about 28 nm the number has been a marketing label rather than a gate length or half-pitch. Density in MTr/mm2 is the only meaningful cross-vendor comparison.

What densities are current?

Roughly 90-100 MTr/mm2 at 7 nm, 130-170 at 5 nm and over 200 at 3 nm class processes, though logic and SRAM scale differently.