diff --git a/python/slsdet/__init__.py b/python/slsdet/__init__.py
index e57c190a5..50abdb59e 100755
--- a/python/slsdet/__init__.py
+++ b/python/slsdet/__init__.py
@@ -35,6 +35,8 @@ currentSrcParameters = _slsdet.currentSrcParameters
 DurationWrapper = _slsdet.DurationWrapper
 pedestalParameters = _slsdet.pedestalParameters
 Hz = _slsdet.Hz
+kHz = _slsdet.kHz
+MHz = _slsdet.MHz
 
 import os
 def read_version():
diff --git a/python/src/frequency.cpp b/python/src/frequency.cpp
index 609450204..792ebf302 100644
--- a/python/src/frequency.cpp
+++ b/python/src/frequency.cpp
@@ -4,23 +4,38 @@
 This file contains Python bindings for the Hz and for conversion to other units from and to string.
 */
 #include "py_headers.h"
+#include <cmath>
 
 #include "sls/ToString.h"
 #include "sls/sls_detector_defs.h"
 
 namespace py = pybind11;
+
+constexpr double kHz = 1e3;
+constexpr double MHz = 1e6;
+
 void init_freq(py::module &m) {
 
     py::class_<slsDetectorDefs::Hz> Hz(m, "Hz");
-    Hz.def(py::init<int v) {
-        return slsDetectorDefs::Hz(v * 1000000);
-    }));
-    Hz.def(py::init([](const std::string &s) { 
-        return sls::StringTo<slsDetectorDefs::Hz>(s); 
+    Hz.def(py::init<int>());
+    Hz.def(py::init([](double v) {
+        return slsDetectorDefs::Hz(static_cast<int>(std::round(v)));
     }));
     Hz.def_readwrite("value", &slsDetectorDefs::Hz::value);
-    Hz.def("__repr__", [](const slsDetectorDefs::Hz &f) { return sls::ToString(f); });
-    Hz.def("__str__", [](const slsDetectorDefs::Hz &f) { return sls::ToString(f); });
+    Hz.def("__repr__", [](const slsDetectorDefs::Hz &f) { 
+        return sls::ToString(f); 
+    });
+    Hz.def("__str__", [](const slsDetectorDefs::Hz &f) { 
+        return sls::ToString(f); 
+    });
     Hz.def(py::self == py::self);
-    py::implicitly_convertible<std::string, slsDetectorDefs::Hz>();
+    m.def("kHz", [](double v) {
+        return slsDetectorDefs::Hz(static_cast<int>(std::round(v * kHz)));
+    });
+
+    m.def("MHz", [](double v) {
+        return slsDetectorDefs::Hz(static_cast<int>(std::round(v * MHz)));
+    });
+    py::implicitly_convertible<int, slsDetectorDefs::Hz>();
+    py::implicitly_convertible<double, slsDetectorDefs::Hz>();
 }
\ No newline at end of file
diff --git a/slsDetectorSoftware/generator/commands.yaml b/slsDetectorSoftware/generator/commands.yaml
index d55486029..efe173a97 100644
--- a/slsDetectorSoftware/generator/commands.yaml
+++ b/slsDetectorSoftware/generator/commands.yaml
@@ -481,7 +481,7 @@ CTB_GET_INDEX:
 ################# COMMANDS ##################################
 ################# FREQ_COMMAND #############
 adcclk:
-  help: "[n_clk] [(optional unit) Hz|kHz|MHz(default)]\n\t[Ctb][Xilinx Ctb] ADC clock frequency."
+  help: "[n_clk] [(optional unit) Hz(default)|kHz|MHz]\n\t[Ctb][Xilinx Ctb] ADC clock frequency."
   inherit_actions: FREQ_COMMAND
   actions:
     GET:
@@ -490,7 +490,7 @@ adcclk:
       function: setADCClock
 
 runclk:
-  help: "[n_clk] [(optional unit) Hz|kHz|MHz(default)]\n\t[Ctb][Xilinx Ctb] Run clock frequency."
+  help: "[n_clk] [(optional unit) Hz(default)|kHz|MHz]\n\t[Ctb][Xilinx Ctb] Run clock frequency."
   inherit_actions: FREQ_COMMAND
   actions:
     GET:
@@ -500,7 +500,7 @@ runclk:
 
 
 dbitclk:
-  help: "[n_clk] [(optional unit) Hz|kHz|MHz(default)]\n\t[Ctb][Xilinx Ctb]  Clock for latching the digital bits."
+  help: "[n_clk] [(optional unit) Hz(default)|kHz|MHz]\n\t[Ctb][Xilinx Ctb]  Clock for latching the digital bits."
   inherit_actions: FREQ_COMMAND
   actions:
     GET:
@@ -512,7 +512,7 @@ dbitclk:
 
 syncclk:
   inherit_actions: FREQ_GET_COMMAND
-  help: "[n_clk] [(optional unit) Hz|kHz|MHz(default)]\n\t[Ctb] Sync clock."
+  help: "[n_clk] [(optional unit) Hz(default)|kHz|MHz]\n\t[Ctb] Sync clock."
   actions:
     GET:
       function: getSYNCClock
diff --git a/slsDetectorSoftware/tests/Caller/test-Caller-chiptestboard.cpp b/slsDetectorSoftware/tests/Caller/test-Caller-chiptestboard.cpp
index 47f03254f..035263c8a 100644
--- a/slsDetectorSoftware/tests/Caller/test-Caller-chiptestboard.cpp
+++ b/slsDetectorSoftware/tests/Caller/test-Caller-chiptestboard.cpp
@@ -787,13 +787,13 @@ TEST_CASE("runclk", "[.detectorintegration]") {
 
         {
             std::ostringstream oss;
-            caller.call("runclk", {"20"}, -1, PUT, oss);
-            REQUIRE(oss.str() == "runclk 20\n");
+            caller.call("runclk", {"20MHz"}, -1, PUT, oss);
+            REQUIRE(oss.str() == "runclk 20MHz\n");
         }
         {
             std::ostringstream oss;
-            caller.call("runclk", {"10"}, -1, PUT, oss);
-            REQUIRE(oss.str() == "runclk 10\n");
+            caller.call("runclk", {"10000000"}, -1, PUT, oss);
+            REQUIRE(oss.str() == "runclk 10000000\n");
         }
 
         {
diff --git a/slsSupportLib/include/sls/ToString.h b/slsSupportLib/include/sls/ToString.h
index f38fa0019..01ce73415 100644
--- a/slsSupportLib/include/sls/ToString.h
+++ b/slsSupportLib/include/sls/ToString.h
@@ -354,11 +354,11 @@ T StringTo(const std::string &f, const std::string &unit) {
         return result;
     }();
 
-    if (unitLower.empty() || unitLower == "mhz") {
+    if (unitLower == "mhz") {
         return T(static_cast<int>(fval * 1e6));
     } else if (unitLower == "khz") {
         return T(static_cast<int>(fval * 1e3));
-    } else if (unitLower == "hz") {
+    } else if (unitLower.empty() || unitLower == "hz") {
         return T(static_cast<int>(fval));
     } else {
         throw RuntimeError(
diff --git a/slsSupportLib/tests/test-ToString.cpp b/slsSupportLib/tests/test-ToString.cpp
index d920838a0..5e0d56d39 100644
--- a/slsSupportLib/tests/test-ToString.cpp
+++ b/slsSupportLib/tests/test-ToString.cpp
@@ -147,7 +147,7 @@ TEST_CASE("string to std::chrono::duration", "[support]") {
 }
 
 TEST_CASE("string to frequency", "[support]") {
-    REQUIRE(StringTo<defs::Hz>("150Hz") == defs::Hz(150));
+    REQUIRE(StringTo<defs::Hz>("150") == defs::Hz(150));
     REQUIRE(StringTo<defs::Hz>("150Hz") == defs::Hz(150));
     REQUIRE(StringTo<defs::Hz>("1.5kHz") == defs::Hz(1500));
     REQUIRE(StringTo<defs::Hz>("1.5MHz") == defs::Hz(1500000));