diff --git a/src/qibocal/protocols/characterization/rabi/amplitude.py b/src/qibocal/protocols/characterization/rabi/amplitude.py
index 4523a85f4..644905514 100644
--- a/src/qibocal/protocols/characterization/rabi/amplitude.py
+++ b/src/qibocal/protocols/characterization/rabi/amplitude.py
@@ -158,7 +158,7 @@ def _fit(data: RabiAmplitudeData) -> RabiAmplitudeResults:
         index = local_maxima[0] if len(local_maxima) > 0 else None
         # 0.5 hardcoded guess for less than one oscillation
         f = x[index] / (x[1] - x[0]) if index is not None else 0.5
-        pguess = [0.5, 0.5, np.max(x) / f, np.pi / 2]
+        pguess = [0.5, 0.5, 1 / f, np.pi / 2]
         try:
             popt, perr = curve_fit(
                 utils.rabi_amplitude_fit,
diff --git a/src/qibocal/protocols/characterization/rabi/amplitude_msr.py b/src/qibocal/protocols/characterization/rabi/amplitude_msr.py
index 60d106d18..438ab6681 100644
--- a/src/qibocal/protocols/characterization/rabi/amplitude_msr.py
+++ b/src/qibocal/protocols/characterization/rabi/amplitude_msr.py
@@ -164,7 +164,7 @@ def _fit(data: RabiAmplitudeVoltData) -> RabiAmplitudeVoltResults:
                 popt[2] * (x_max - x_min),
                 popt[3] - 2 * np.pi * x_min / (x_max - x_min) * popt[2],
             ]
-            pi_pulse_parameter = np.abs((1.0 / translated_popt[2]) / 2)
+            pi_pulse_parameter = np.abs((translated_popt[2]) / 2)
 
         except:
             log.warning("rabi_fit: the fitting was not succesful")