diff --git a/lib/DeployActions/DockerActions.php b/lib/DeployActions/DockerActions.php
index ae17b8d7..ca21004a 100644
--- a/lib/DeployActions/DockerActions.php
+++ b/lib/DeployActions/DockerActions.php
@@ -1125,7 +1125,7 @@ public function buildDeployParams(DaemonConfig $daemonConfig, array $appInfo): a
 			'devices' => $devices,
 			'deviceRequests' => $deviceRequests,
 			'mounts' => $appInfo['external-app']['mounts'] ?? [],
-			'resourceLimits' => $deployConfig['resourceLimits'] ?? []
+			'resourceLimits' => AppAPICommonService::buildResourceLimits($deployConfig)
 		];
 
 		return [
diff --git a/lib/DeployActions/KubernetesActions.php b/lib/DeployActions/KubernetesActions.php
index e278d5ad..e64cd239 100644
--- a/lib/DeployActions/KubernetesActions.php
+++ b/lib/DeployActions/KubernetesActions.php
@@ -666,7 +666,7 @@ public function buildDeployParams(DaemonConfig $daemonConfig, array $appInfo): a
 			'net' => 'bridge',
 			'env' => $envs,
 			'computeDevice' => $deployConfig['computeDevice'] ?? null,
-			'resourceLimits' => $deployConfig['resourceLimits'] ?? []
+			'resourceLimits' => AppAPICommonService::buildResourceLimits($deployConfig)
 		];
 
 		$result = [
diff --git a/lib/Service/AppAPICommonService.php b/lib/Service/AppAPICommonService.php
index 77cd4cdd..8614c932 100644
--- a/lib/Service/AppAPICommonService.php
+++ b/lib/Service/AppAPICommonService.php
@@ -56,4 +56,22 @@ public function buildExAppHost(array $deployConfig): string {
 		}
 		return '127.0.0.1';  # fallback to loop-back adapter
 	}
+
+	/**
+	 * Docker takes the memory and CPU limits as whole numbers, but the admin settings compute them from decimal
+	 * input (`Number(cpus) * 1000000000`), which can store a value such as 1070000000.0000001.
+	 */
+	public static function buildResourceLimits(array $deployConfig): array {
+		$resourceLimits = $deployConfig['resourceLimits'] ?? [];
+		if (!is_array($resourceLimits)) {
+			return [];
+		}
+		foreach (['memory', 'nanoCPUs'] as $limit) {
+			$value = $resourceLimits[$limit] ?? null;
+			if (is_float($value) && abs($value) < PHP_INT_MAX) {
+				$resourceLimits[$limit] = (int)round($value);
+			}
+		}
+		return $resourceLimits;
+	}
 }
diff --git a/tests/php/DeployActions/DockerActionsTest.php b/tests/php/DeployActions/DockerActionsTest.php
index 1aa3d666..f72d0a6e 100644
--- a/tests/php/DeployActions/DockerActionsTest.php
+++ b/tests/php/DeployActions/DockerActionsTest.php
@@ -173,4 +173,17 @@ public function testShouldPullImage(array $registries, bool $expected): void {
 		$shouldPullImage = new ReflectionMethod($this->dockerActions, 'shouldPullImage');
 		self::assertSame($expected, $shouldPullImage->invoke($this->dockerActions, $imageParams, $daemonConfig));
 	}
+
+	public function testBuildDeployParamsRoundsTheResourceLimits(): void {
+		// What the admin settings store for a CPU limit of 1.07.
+		$daemonConfig = new DaemonConfig(['deploy_config' => [
+			'computeDevice' => ['id' => 'cpu'],
+			'resourceLimits' => ['nanoCPUs' => 1.07 * 1000000000],
+		]]);
+		$appInfo = ['id' => 'test-deploy', 'name' => 'Test Deploy', 'version' => '1.0.0', 'port' => 23000, 'secret' => 'secret', 'external-app' => []];
+
+		$params = $this->dockerActions->buildDeployParams($daemonConfig, $appInfo);
+
+		self::assertSame(['nanoCPUs' => 1070000000], $params['container_params']['resourceLimits']);
+	}
 }
diff --git a/tests/php/DeployActions/KubernetesActionsTest.php b/tests/php/DeployActions/KubernetesActionsTest.php
index ed5d5d70..136f6f03 100644
--- a/tests/php/DeployActions/KubernetesActionsTest.php
+++ b/tests/php/DeployActions/KubernetesActionsTest.php
@@ -133,6 +133,19 @@ public function testDeployExAppSendsTheMappedImageForEveryRole(): void {
 		}
 	}
 
+	public function testBuildDeployParamsRoundsTheResourceLimits(): void {
+		// What the admin settings store for a CPU limit of 1.07.
+		$daemonConfig = new DaemonConfig([
+			'accepts_deploy_id' => KubernetesActions::DEPLOY_ID,
+			'deploy_config' => ['resourceLimits' => ['nanoCPUs' => 1.07 * 1000000000]],
+		]);
+		$appInfo = ['id' => 'test-deploy', 'name' => 'Test Deploy', 'version' => '1.0.0', 'port' => 23000, 'secret' => 'secret', 'external-app' => []];
+
+		$params = $this->kubernetesActions->buildDeployParams($daemonConfig, $appInfo);
+
+		self::assertSame(['nanoCPUs' => 1070000000], $params['container_params']['resourceLimits']);
+	}
+
 	/**
 	 * Runs deployExApp() against queued HaRP responses and returns the payloads of the /exapp/create requests.
 	 */
diff --git a/tests/php/Service/AppAPICommonServiceTest.php b/tests/php/Service/AppAPICommonServiceTest.php
new file mode 100644
index 00000000..9b511579
--- /dev/null
+++ b/tests/php/Service/AppAPICommonServiceTest.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\AppAPI\Tests\php\Service;
+
+use OCA\AppAPI\Service\AppAPICommonService;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+
+class AppAPICommonServiceTest extends TestCase {
+
+	public static function resourceLimitsProvider(): array {
+		return [
+			'no limits' => [[], []],
+			'empty limits' => [['resourceLimits' => []], []],
+			'whole numbers stay as they are' => [
+				['resourceLimits' => ['memory' => 536870912, 'nanoCPUs' => 2000000000]],
+				['memory' => 536870912, 'nanoCPUs' => 2000000000],
+			],
+			// What the admin settings store for 1.07 and 2.01 CPUs.
+			'a fraction above is rounded' => [['resourceLimits' => ['nanoCPUs' => 1070000000.0000001]], ['nanoCPUs' => 1070000000]],
+			'a fraction below is rounded' => [['resourceLimits' => ['nanoCPUs' => 2009999999.9999998]], ['nanoCPUs' => 2010000000]],
+			'a fractional memory value is rounded' => [['resourceLimits' => ['memory' => 512.3 * 1024 * 1024]], ['memory' => 537185485]],
+			'other values are passed on for HaRP to check' => [
+				['resourceLimits' => ['nanoCPUs' => '1.5', 'memory' => 1e30, 'other' => 1.5]],
+				['nanoCPUs' => '1.5', 'memory' => 1e30, 'other' => 1.5],
+			],
+			'not a list of limits' => [['resourceLimits' => 'x'], []],
+		];
+	}
+
+	#[DataProvider('resourceLimitsProvider')]
+	public function testBuildResourceLimits(array $deployConfig, array $expected): void {
+		$this->assertSame($expected, AppAPICommonService::buildResourceLimits($deployConfig));
+	}
+}