# Loschmidt Constant

Use Loschmidt in Calcul.io. See what this built-in constant represents, enter it in an editable calculation, and review related values and units.

## loschmidt

Loschmidt constant at T=273.15 K and p=101.325 kPa

Try it yourself:

```calculio
loschmidt
```

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## Loschmidt constant: particle density reference

**loschmidt** is the Loschmidt constant, a number-density reference for an ideal gas at specified standard conditions.

## Use

It links molecular counts and gas volume. Pair it with the [Avogadro constant](https://calcul.io/constants/avogadro/index.md), [molar volume](https://calcul.io/constants/molarVolume/index.md), and [to()](https://calcul.io/function/to/index.md) for unit conversion.

## Caveat

Standard temperature and pressure conventions vary; always state the reference conditions.

[All constants](https://calcul.io/constants/index.md)