diff --git a/README.md b/README.md
index f65f25f..c3d31ee 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,9 @@ Sets LoRa Spread Factor.
 
 Accepts `6`-`12`.
 
+### `double lora32_calc_datarate(lora32_cfg_t *lora);`
+Returns data rate in Bits Per Second (bps) for given `lora32_cfg_t` configuration.
+
 ### `void lora32_dump_regs(lora32_cfg_t *lora)`
 Dumps all registers from SX1276.
 
diff --git a/include/esp32-lora.h b/include/esp32-lora.h
index ceeeea8..46159da 100644
--- a/include/esp32-lora.h
+++ b/include/esp32-lora.h
@@ -126,6 +126,7 @@ lora32_cfg_t lora32_create();
 uint8_t lora32_init(lora32_cfg_t *config);
 uint8_t lora32_data_available(lora32_cfg_t *lora);
 
+double lora32_calc_datarate(lora32_cfg_t *lora);
 void lora32_dump_regs(lora32_cfg_t *lora);
 void lora32_enable_continuous_rx(lora32_cfg_t *lora);
 void lora32_enable_cad(lora32_cfg_t *lora);
diff --git a/main/esp32-lora.c b/main/esp32-lora.c
index faf7029..9b4c998 100644
--- a/main/esp32-lora.c
+++ b/main/esp32-lora.c
@@ -1,4 +1,5 @@
 #include <string.h>
+#include <math.h>
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
@@ -97,6 +98,15 @@ void lora32_write_reg(lora32_cfg_t *lora, uint8_t address, uint8_t value) {
   ESP_ERROR_CHECK(spi_device_transmit(spi, &t));
 };
 
+double lora32_calc_datarate(lora32_cfg_t *lora) {
+  double cr = (4.0 / (long)lora->codingRate);
+  double sf = pow(2, lora->spreadingFactor);
+  double c2 = sf / bandwidths[lora->bandwidth];
+  ESP_LOGI(TAG, "codingRate: %d cr: %f sf: %f c2: %f", lora->codingRate, cr, sf, c2);
+
+  return lora->spreadingFactor * cr / c2 * 1000;
+}
+
 void lora23_set_explicit_header(lora32_cfg_t *lora) {
   lora->implicitHeader = false;