There is disclosed a constant force compression tool for measuring a compressible material. In an embodiment, the tool includes a handle having a passageway receiving a plunger. The tool includes a biasing member in communication with the plunger and the handle. The tool includes a retaining element in communication with the plunger and the handle. There is disclosed a system for measuring a compressible material with a measurement tube and a constant force compression tool. There is disclosed a method of measuring a compressible material. In an embodiment, the method includes selecting a measurement tube. The method includes placing a compressible material into the measurement tube. The method includes pressing a plunger against the compressible material. The method includes monitoring an indicator to determine a full volume of compressible material between the end of the plunger and the conical tube. Other embodiments are also disclosed.