Whats the math for 16 walkspeed according to position?

So Im trying to make a anti exploit and if their walkspeed is just above 16 I will teleport them back to the position but I dnt know the math for 16 walkspeed I heard its studs per second

so for example since u cant see walkspeed on the server

Player walks 20 studs per second then I teleport them back

Here is a script that will print warnings when players travel faster than their WalkSpeed.

game.Players.PlayerAdded:Connect(function(player)
	player.CharacterAdded:Connect(function(character)
		-- wait for character to be inserted into Workspace
		character.AncestryChanged:wait()
		
		local lastPosition = character.HumanoidRootPart.Position
		
		while character.HumanoidRootPart:IsDescendantOf(game) do
			local actualTime = wait(1)
			local expectedMaxDistance =
				character.Humanoid.WalkSpeed * actualTime
			local actualDistance =
				(character.HumanoidRootPart.Position - lastPosition)
				.magnitude
			local actualSpeed =
				actualDistance / actualTime
			
			lastPosition = character.HumanoidRootPart.Position
			
			if actualSpeed > character.Humanoid.WalkSpeed then
				print(player.Name.." might be using hax! They traveled at "
					..actualSpeed.." studs/second, but their WalkSpeed is "
					..character.Humanoid.WalkSpeed..".")
			end
		end
	end)
end)

Note that this doesn't account for falling, network rubberbanding, inaccuracies in the Roblox engine regarding character speed, changes in position due to spawning, etc. Tracking a player's speed should only be one small heuristic used alongside other methods to determine if hacks are being used!