diff --git a/src/frostfs_testlib/load/load_config.py b/src/frostfs_testlib/load/load_config.py
index 3ea66b8..6f355fc 100644
--- a/src/frostfs_testlib/load/load_config.py
+++ b/src/frostfs_testlib/load/load_config.py
@@ -3,11 +3,28 @@ import os
 from dataclasses import dataclass, field, fields, is_dataclass
 from enum import Enum
 from types import MappingProxyType
-from typing import Any, Optional, get_args
+from typing import Any, Callable, Optional, get_args
 
 from frostfs_testlib.utils.converting_utils import calc_unit
 
 
+def convert_time_to_seconds(time: int | str | None) -> int:
+    if time is None:
+        return None
+    if str(time).isdigit():
+        seconds = int(time)
+    else:
+        days, hours, minutes = 0, 0, 0
+        if "d" in time:
+            days, time = time.split("d")
+        if "h" in time:
+            hours, time = time.split("h")
+        if "min" in time:
+            minutes = time.replace("min", "")
+        seconds = int(days) * 86400 + int(hours) * 3600 + int(minutes) * 60
+    return seconds
+
+
 class LoadType(Enum):
     gRPC = "grpc"
     S3 = "s3"
@@ -76,6 +93,7 @@ def metadata_field(
     scenario_variable: Optional[str] = None,
     string_repr: Optional[bool] = True,
     distributed: Optional[bool] = False,
+    formatter: Optional[Callable] = None,
 ):
     return field(
         default=None,
@@ -85,6 +103,7 @@ def metadata_field(
             "env_variable": scenario_variable,
             "string_repr": string_repr,
             "distributed": distributed,
+            "formatter": formatter,
         },
     )
 
@@ -200,7 +219,9 @@ class LoadParams:
 
     # ------- COMMON SCENARIO PARAMS -------
     # Load time is the maximum duration for k6 to give load. Default is the BACKGROUND_LOAD_DEFAULT_TIME value.
-    load_time: Optional[int] = metadata_field(all_load_scenarios, None, "DURATION", False)
+    load_time: Optional[int] = metadata_field(
+        all_load_scenarios, None, "DURATION", False, formatter=convert_time_to_seconds
+    )
     # Object size in KB for load and preset.
     object_size: Optional[int] = metadata_field(all_load_scenarios, "size", "WRITE_OBJ_SIZE", False)
     # For read operations, controls from which set get objects to read
@@ -384,6 +405,25 @@ class LoadParams:
 
         return fields_with_data or []
 
+    def _get_field_formatter(self, field_name: str) -> Callable | None:
+        data_fields = fields(self)
+        formatters = [
+            field.metadata["formatter"]
+            for field in data_fields
+            if field.name == field_name and "formatter" in field.metadata and field.metadata["formatter"] != None
+        ]
+        if formatters:
+            return formatters[0]
+
+        return None
+
+    def __setattr__(self, field_name, value):
+        formatter = self._get_field_formatter(field_name)
+        if formatter:
+            value = formatter(value)
+
+        super().__setattr__(field_name, value)
+
     def __str__(self) -> str:
         load_type_str = self.scenario.value if self.scenario else self.load_type.value
         # TODO: migrate load_params defaults to testlib
diff --git a/tests/test_load_config.py b/tests/test_load_config.py
index 926399b..f4fa022 100644
--- a/tests/test_load_config.py
+++ b/tests/test_load_config.py
@@ -141,6 +141,8 @@ class TestLoadConfig:
             "--workers '7'",
             "--containers '16'",
             "--policy 'container_placement_policy'",
+            "--ignore-errors",
+            "--sleep '19'",
         ]
         expected_env_vars = {
             "DURATION": 9,
@@ -151,6 +153,7 @@ class TestLoadConfig:
             "WRITERS": 7,
             "READERS": 7,
             "DELETERS": 8,
+            "READ_AGE": 8,
             "PREGEN_JSON": "pregen_json",
             "PREPARE_LOCALLY": True,
         }
@@ -167,6 +170,8 @@ class TestLoadConfig:
             "--workers '7'",
             "--containers '16'",
             "--policy 'container_placement_policy'",
+            "--ignore-errors",
+            "--sleep '19'",
         ]
         expected_env_vars = {
             "DURATION": 9,
@@ -184,6 +189,7 @@ class TestLoadConfig:
             "TIME_UNIT": "time_unit",
             "WRITE_RATE": 10,
             "READ_RATE": 9,
+            "READ_AGE": 8,
             "DELETE_RATE": 11,
             "PREPARE_LOCALLY": True,
         }
@@ -201,6 +207,8 @@ class TestLoadConfig:
             "--workers '7'",
             "--buckets '13'",
             "--location 's3_location'",
+            "--ignore-errors",
+            "--sleep '19'",
         ]
         expected_env_vars = {
             "DURATION": 9,
@@ -211,6 +219,7 @@ class TestLoadConfig:
             "WRITERS": 7,
             "READERS": 7,
             "DELETERS": 8,
+            "READ_AGE": 8,
             "NO_VERIFY_SSL": True,
             "PREGEN_JSON": "pregen_json",
         }
@@ -218,6 +227,44 @@ class TestLoadConfig:
         self._check_preset_params(load_params, expected_preset_args)
         self._check_env_vars(load_params, expected_env_vars)
 
+    @pytest.mark.parametrize("load_params", [LoadScenario.S3_CAR], indirect=True)
+    def test_argument_parsing_for_s3_car_scenario_with_stringed_time(self, load_params: LoadParams):
+        load_params.load_time = "2d3h5min"
+        expected_preset_args = [
+            "--size '11'",
+            "--preload_obj '13'",
+            "--no-verify-ssl",
+            "--out 'pregen_json'",
+            "--workers '7'",
+            "--buckets '13'",
+            "--location 's3_location'",
+            "--ignore-errors",
+            "--sleep '19'",
+        ]
+        expected_env_vars = {
+            "DURATION": 183900,
+            "WRITE_OBJ_SIZE": 11,
+            "REGISTRY_FILE": "registry_file",
+            "K6_MIN_ITERATION_DURATION": "min_iteration_duration",
+            "K6_SETUP_TIMEOUT": "setup_timeout",
+            "NO_VERIFY_SSL": True,
+            "MAX_WRITERS": 11,
+            "MAX_READERS": 11,
+            "MAX_DELETERS": 12,
+            "PRE_ALLOC_DELETERS": 21,
+            "PRE_ALLOC_READERS": 20,
+            "PRE_ALLOC_WRITERS": 20,
+            "PREGEN_JSON": "pregen_json",
+            "TIME_UNIT": "time_unit",
+            "WRITE_RATE": 10,
+            "READ_RATE": 9,
+            "READ_AGE": 8,
+            "DELETE_RATE": 11,
+        }
+
+        self._check_preset_params(load_params, expected_preset_args)
+        self._check_env_vars(load_params, expected_env_vars)
+
     @pytest.mark.parametrize("load_params", [LoadScenario.S3_CAR], indirect=True)
     def test_argument_parsing_for_s3_car_scenario(self, load_params: LoadParams):
         expected_preset_args = [
@@ -228,6 +275,8 @@ class TestLoadConfig:
             "--workers '7'",
             "--buckets '13'",
             "--location 's3_location'",
+            "--ignore-errors",
+            "--sleep '19'",
         ]
         expected_env_vars = {
             "DURATION": 9,
@@ -246,6 +295,7 @@ class TestLoadConfig:
             "TIME_UNIT": "time_unit",
             "WRITE_RATE": 10,
             "READ_RATE": 9,
+            "READ_AGE": 8,
             "DELETE_RATE": 11,
         }
 
@@ -262,6 +312,8 @@ class TestLoadConfig:
             "--workers '7'",
             "--containers '16'",
             "--policy 'container_placement_policy'",
+            "--ignore-errors",
+            "--sleep '19'",
         ]
         expected_env_vars = {
             "DURATION": 9,
@@ -273,6 +325,7 @@ class TestLoadConfig:
             "WRITERS": 7,
             "READERS": 7,
             "DELETERS": 8,
+            "READ_AGE": 8,
             "PREGEN_JSON": "pregen_json",
         }
 
@@ -288,6 +341,8 @@ class TestLoadConfig:
             "--workers '7'",
             "--containers '16'",
             "--policy 'container_placement_policy'",
+            "--ignore-errors",
+            "--sleep '19'",
         ]
         expected_env_vars = {
             "CONFIG_FILE": "config_file",
@@ -299,6 +354,7 @@ class TestLoadConfig:
             "WRITERS": 7,
             "READERS": 7,
             "DELETERS": 8,
+            "READ_AGE": 8,
             "PREGEN_JSON": "pregen_json",
         }
 
@@ -338,6 +394,7 @@ class TestLoadConfig:
             "--workers '0'",
             "--containers '0'",
             "--policy ''",
+            "--sleep '0'",
         ]
         expected_env_vars = {
             "DURATION": 0,
@@ -348,6 +405,7 @@ class TestLoadConfig:
             "WRITERS": 0,
             "READERS": 0,
             "DELETERS": 0,
+            "READ_AGE": 0,
             "PREGEN_JSON": "",
             "PREPARE_LOCALLY": False,
         }
@@ -364,6 +422,7 @@ class TestLoadConfig:
             "--workers '0'",
             "--containers '0'",
             "--policy ''",
+            "--sleep '0'",
         ]
         expected_env_vars = {
             "DURATION": 0,
@@ -382,6 +441,7 @@ class TestLoadConfig:
             "WRITE_RATE": 0,
             "READ_RATE": 0,
             "DELETE_RATE": 0,
+            "READ_AGE": 0,
             "PREPARE_LOCALLY": False,
         }
 
@@ -397,6 +457,7 @@ class TestLoadConfig:
             "--workers '0'",
             "--buckets '0'",
             "--location ''",
+            "--sleep '0'",
         ]
         expected_env_vars = {
             "DURATION": 0,
@@ -407,6 +468,7 @@ class TestLoadConfig:
             "WRITERS": 0,
             "READERS": 0,
             "DELETERS": 0,
+            "READ_AGE": 0,
             "NO_VERIFY_SSL": False,
             "PREGEN_JSON": "",
         }
@@ -423,6 +485,7 @@ class TestLoadConfig:
             "--workers '0'",
             "--buckets '0'",
             "--location ''",
+            "--sleep '0'",
         ]
         expected_env_vars = {
             "DURATION": 0,
@@ -442,6 +505,7 @@ class TestLoadConfig:
             "WRITE_RATE": 0,
             "READ_RATE": 0,
             "DELETE_RATE": 0,
+            "READ_AGE": 0,
         }
 
         self._check_preset_params(load_params, expected_preset_args)
@@ -456,6 +520,7 @@ class TestLoadConfig:
             "--workers '0'",
             "--containers '0'",
             "--policy ''",
+            "--sleep '0'",
         ]
         expected_env_vars = {
             "DURATION": 0,
@@ -467,6 +532,7 @@ class TestLoadConfig:
             "WRITERS": 0,
             "READERS": 0,
             "DELETERS": 0,
+            "READ_AGE": 0,
             "PREGEN_JSON": "",
         }
 
@@ -482,6 +548,7 @@ class TestLoadConfig:
             "--workers '0'",
             "--containers '0'",
             "--policy ''",
+            "--sleep '0'",
         ]
         expected_env_vars = {
             "CONFIG_FILE": "",
@@ -493,6 +560,7 @@ class TestLoadConfig:
             "WRITERS": 0,
             "READERS": 0,
             "DELETERS": 0,
+            "READ_AGE": 0,
             "PREGEN_JSON": "",
         }
 
@@ -531,6 +599,27 @@ class TestLoadConfig:
 
         self._check_env_vars(load_params, expected_env_vars)
 
+    @pytest.mark.parametrize(
+        "load_params, load_type",
+        [(LoadScenario.gRPC, LoadType.gRPC)],
+        indirect=True,
+    )
+    @pytest.mark.parametrize(
+        "load_time, expected_seconds",
+        [
+            (300, 300),
+            ("2d3h45min", 186300),
+            ("1d6h", 108000),
+            ("1d", 86400),
+            ("1d1min", 86460),
+            ("2h", 7200),
+            ("2h2min", 7320),
+        ],
+    )
+    def test_convert_time_to_seconds(self, load_params: LoadParams, load_time: str | int, expected_seconds: int):
+        load_params.load_time = load_time
+        assert load_params.load_time == expected_seconds
+
     def _check_preset_params(self, load_params: LoadParams, expected_preset_args: list[str]):
         preset_parameters = load_params.get_preset_arguments()
         assert sorted(preset_parameters) == sorted(expected_preset_args)