diff --git a/sklearn/calibration.py b/sklearn/calibration.py
index 73439d74d0938..4c8a81a2137ec 100644
--- a/sklearn/calibration.py
+++ b/sklearn/calibration.py
@@ -23,6 +23,7 @@
 from .preprocessing import label_binarize, LabelBinarizer
 from .utils import check_X_y, check_array, indexable, column_or_1d
 from .utils.validation import check_is_fitted, check_consistent_length
+from .utils.validation import _check_sample_weight
 from .isotonic import IsotonicRegression
 from .svm import LinearSVC
 from .model_selection import check_cv
@@ -176,8 +177,7 @@ def fit(self, X, y, sample_weight=None):
                 base_estimator_sample_weight = None
             else:
                 if sample_weight is not None:
-                    sample_weight = check_array(sample_weight, ensure_2d=False)
-                    check_consistent_length(y, sample_weight)
+                    sample_weight = _check_sample_weight(sample_weight, X)
                 base_estimator_sample_weight = sample_weight
             for train, test in cv.split(X, y):
                 this_estimator = clone(base_estimator)