Most induction stovetops have a boost function with around 3-4 kW (that's about 13000 BTUs).
BUT contrary to a gas stove top, almost all of the energy is actually put into the pot instead of the surroundings (only 30-40% of the energy from a gas stove is used to heat the pot). Meaning that a 4 kW induction cooktop should be comparable to a 40'000 BTUs gas stove (single burner).
1 kW is 3412 BTU/h (=BTUs)
Most induction stovetops have a boost function with around 3-4 kW (that's about 13000 BTUs).
BUT contrary to a gas stove top, almost all of the energy is actually put into the pot instead of the surroundings (only 30-40% of the energy from a gas stove is used to heat the pot). Meaning that a 4 kW induction cooktop should be comparable to a 40'000 BTUs gas stove (single burner).