QFT may stand for:
- QuantiFERON, a test for tuberculosis infection or latent tuberculosis
- Quantitative feedback theory
- Quantum field theory, the theory of quantum mechanics for relativistic systems
- Quantum Fourier transform, a Fourier transform acting on quantum bits
- Queen's Film Theatre, a cinema in Northern Ireland
- In Internet slang, an abbreviation for quoted for truth (used when quoting someone with similar views as yours).