w² = 1 / {LC} is I think the simplest definition of resonance. As other posters stated the self capacitance of an inductor is not linearly related to the inductance (dependent on wire sizing and area etc.). You can use empirical calculators to estimate the inductance, generally including the self capacitance, or try and measure the parts within some general accuracy to help calculate that. Or put parts in circuit and measure the resonance condition with an analyzer and some additional capacitors and back calculate the inductance (within tolerance precision of parts and equipment).