Work out lut and flip flop count instantly with clear inputs, formula shown and shareable results.
Gate-count estimates translate to LUTs by dividing by gates per LUT — about 6-10 for a 6-input LUT — and then by a packing efficiency, because synthesis cannot always fill every LUT input. Register count follows from the design's sequential density.
LUT estimate
LUTs = gates / gates per LUT / packing efficiency; slices = LUTs / LUTs per slice
It can implement any 6-input function, equivalent to roughly 8-20 gates for complex logic but only 1-2 for simple wide gates. Averages of 6-10 are used for estimating.
Logic partitioning cannot always use all inputs of every LUT, and placement constraints prevent perfect packing into slices.