diff --git a/docs/zr_manual.htm b/docs/zr_manual.htm
index 873f1ab..b0e276a 100644
--- a/docs/zr_manual.htm
+++ b/docs/zr_manual.htm
@@ -1366,6 +1366,10 @@ the admin-only flag in the <span class="code">flags</span> attribute.</p>
 					<td class="parameter">0.0</td>
 				</tr>
 			</table>
+			<p>Formula for converting LMV speed into a prop speed offset:</p>
+			<blockquote><code><em>prop speed offset</em> = ((<em>lmv speed</em> / 300) * 250) - 250</code></blockquote>
+			<p>This calculation can be done directly on a calculator, without any use of parentheses
+			(they aren't needed in this one anyways).</p>
 		</td>
 	</tr>