Single-layer spiral capacitor utilising fractal geometry is investigated. This capacitor makes use of both lateral and vertical fluxes to improve the capacitance density. Both PCB and on-chip capacitors are designed and simulated using high-frequency structural simulator. The structures are fabricated on PCB using PCB fabrication techniques. The measurement of PCB prototype is carried out by vector network analyser. The result shows the inclusion of fractal concept to spiral capacitor increases capacitance by 10.3%, quality factor by 52.4% and 20% improvement in self-resonant frequency over conventional spiral capacitor.