diff --git a/rtc_base/experiments/field_trial_parser.cc b/rtc_base/experiments/field_trial_parser.cc
index 5565c8648c..a2d7f97bde 100644
--- a/rtc_base/experiments/field_trial_parser.cc
+++ b/rtc_base/experiments/field_trial_parser.cc
@@ -82,7 +82,10 @@ absl::optional<bool> ParseTypedParameter<bool>(std::string str) {
 template <>
 absl::optional<double> ParseTypedParameter<double>(std::string str) {
   double value;
-  if (sscanf(str.c_str(), "%lf", &value) == 1) {
+  char unit[2]{0, 0};
+  if (sscanf(str.c_str(), "%lf%1s", &value, unit) >= 1) {
+    if (unit[0] == '%')
+      return value / 100;
     return value;
   } else {
     return absl::nullopt;
diff --git a/rtc_base/experiments/field_trial_parser_unittest.cc b/rtc_base/experiments/field_trial_parser_unittest.cc
index 954909bce4..de977ec8ba 100644
--- a/rtc_base/experiments/field_trial_parser_unittest.cc
+++ b/rtc_base/experiments/field_trial_parser_unittest.cc
@@ -76,6 +76,15 @@ TEST(FieldTrialParserTest, CanHandleMixedInput) {
   EXPECT_EQ(exp.ping.Get(), true);
   EXPECT_EQ(exp.hash.Get(), "");
 }
+TEST(FieldTrialParserTest, ParsesDoubleParameter) {
+  FieldTrialParameter<double> double_param("f", 0.0);
+  ParseFieldTrial({&double_param}, "f:45%");
+  EXPECT_EQ(double_param.Get(), 0.45);
+  ParseFieldTrial({&double_param}, "f:34 %");
+  EXPECT_EQ(double_param.Get(), 0.34);
+  ParseFieldTrial({&double_param}, "f:0.67");
+  EXPECT_EQ(double_param.Get(), 0.67);
+}
 TEST(FieldTrialParserTest, IgnoresNewKey) {
   DummyExperiment exp("Disabled,r:-11,foo");
   EXPECT_FALSE(exp.enabled.Get());