Electric bicycle with an electric drive which comprises an output element, wherein the output element is operatively connected on the input side at least to an electric motor and is operatively connected on the output side to a rear wheel or a front wheel, wherein the level of an assistance motor torque of the electric motor depends on a rider torque acting on a pedal crankshaft, and a calculation unit which is configured to estimate the rider torque acting on the pedal crankshaft, wherein a pitch inclination (a) of the electric bicycle is taken into account in the estimation of the rider torque, wherein a bicycle pitch rate sensor and a bicycle vertical acceleration sensor are provided, which are connected to the calculation unit, wherein the signals of the bicycle pitch rate sensor and of the bicycle vertical acceleration sensor are included in the determination of the pitch inclination (a) of the electric bicycle, wherein the calculation unit comprises a weighting unit, the weighting unit being configured to weight the signals of the bicycle pitch rate sensor and the bicycle vertical acceleration sensor, characterised in that the weighting unit is configured to weight the signals of the bicycle pitch rate sensor and the bicycle vertical acceleration sensor as a function of the acceleration of the electric bicycle in the direction of travel, and at relatively high accelerations of the electric bicycle the signals of the bicycle pitch rate sensor have a higher weighting than the signals of the bicycle vertical acceleration sensor and at relatively low accelerations of the electric bicycle the signals of the bicycle vertical acceleration sensor have a higher weighting than the signals of the bicycle pitch rate sensor. an electric drive which comprises an output element, wherein the output element is operatively connected on the input side at least to an electric motor and is operatively connected on the output side to a rear wheel or a front wheel, wherein the level of an assistance motor torque of the electric motor depends on a rider torque acting on a pedal crankshaft, and a calculation unit which is configured to estimate the rider torque acting on the pedal crankshaft, wherein a pitch inclination (a) of the electric bicycle is taken into account in the estimation of the rider torque, wherein a bicycle pitch rate sensor and a bicycle vertical acceleration sensor are provided, which are connected to the calculation unit, wherein the signals of the bicycle pitch rate sensor and of the bicycle vertical acceleration sensor are included in the determination of the pitch inclination (a) of the electric bicycle, wherein the calculation unit comprises a weighting unit, the weighting unit being configured to weight the signals of the bicycle pitch rate sensor and the bicycle vertical acceleration sensor, characterised in that the weighting unit is configured to weight the signals of the bicycle pitch rate sensor and the bicycle vertical acceleration sensor as a function of the acceleration of the electric bicycle in the direction of travel, and at relatively high accelerations of the electric bicycle the signals of the bicycle pitch rate sensor have a higher weighting than the signals of the bicycle vertical acceleration sensor and at relatively low accelerations of the electric bicycle the signals of the bicycle vertical acceleration sensor have a higher weighting than the signals of the bicycle pitch rate sensor.