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# Factorio Runtime Docs Version 2.0.77

# FluidAmount - Runtime Docs

## FluidAmount :: double

A fluid amount. The amount is stored as a fixed-size signed 64 bit integer, with 24 bits reserved for decimal precision, meaning the smallest value step is `1/2^24`.

Concept used in

- LuaEntity::get_fluid_contents()
- LuaEntityPrototype::fluid_buffer_size
- LuaEntityPrototype::activation_buffer_ratio
- LuaEntityPrototype::fluid_buffer_input_flow
- LuaFluidBox::flush()
- LuaTrain::get_fluid_contents()