Ask LH: How Much TV Input Lag Is Too Much?

Dear Lifehacker, I am currently in the market for a new TV. The new TV will be used for gaming, Blu-ray movies, watching TV and movies on Apple TV and watching Netflix and other streaming services. One big thing I'm finding hard to get my head across is input lag. So my question is, what is classed as "bad" input lag? The TVs I've looked at some have 37ms of lag, while others are lower or higher. I've been told that anything higher than 30ms is not good. What is considered an acceptable amount? Thanks, Telly Hunter

Dear TH,

To briefly outline the problem for anyone wondering what input lag is, it's the delay between a picture being generated by a source application, and the actual presentation of that image on your screen.

Of the scenarios you've outlined, it's the gaming side of things where input lag has the potential to be a problem. In a non-interactive medium such as TV watching, whether streaming, Blu-Ray or free to air, the fact that you have a split-second of delay between choosing a file to watch and actually watching it won't matter at all. Whereas in gaming, the difference in input lag can have a definite effect on how responsive you feel a game is, and, in the case of competitive online games, the difference between winning and losing — maybe.

The issue with input lag is that it can be something of a sensitivity issue; some gamers are particularly fussy about input lag, while others don't find it notably affects their overall performance. It will vary depending on the title you're playing and whether you're playing online, where netcode lag can also play its part.

It's also worth bearing in mind that many TVs have specific "game" modes that switch off other screen processing features to minimise input lag, so be sure to check the specifications for this on TVs you're considering to buy.

In terms of input lag, lower response is better, but 30ms is particularly fussy. If you can get a TV at a price/feature point that suits you with sub-30ms input lag, then go for it, but anything up to around 50ms should be fine for "most" gamers. It's a subjective thing, however, and that means your best bet is to test it out yourself if feasible.

One thing you could try is checking if your TV retailer would be happy with you bringing in a console (or small form factor PC) to plug into a TV prior to purchase. Most large screen buys aren't for small amount of money, and if you explain that you're particularly worried about how it will handle input lag, they may be willing to let you experiment to find the perfect TV for you. You're more likely to get that kind of service out of a higher-end retailer than a mass market merchant, however.

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    You can always check out

    Manufacturers don't exactly advertise their input lag, and most of the online databases are for overseas models.

    Lifehacker AU needs to do their own testing! Should do a bunch of tests on all the TVs in and around their offices.

    I made a very crude input lag meter using my tablet. I downloaded a stopwatch app with millisecond display. Then output/mirror the tablet to the TV via the HDMI cable. Stood back and took several photos of both the TV and the tablet at the same time. The tablet was consistently showing a time about 50ms ahead of the time shown on the TV. (Old 55" Samsung LED TV with Game Mode turned on)

    Obviously, I can't take the 50ms figure at face value, but if I use the same setup on all my testing, then the relative figures (i.e. lower or higher number on a different tv) would be telling.

    Yeah I didn't know this way a thing until after I bought a cheaper TV from Dick-Smith. It's not too much of a hassle as I'm using the VGA port on it to connect a retired small factor Media Center PC to it. But if I was a gamer the input lag makes it unusable :(

    My COD gaming has been lacking. I had a 9000 series 2013 Samsung. Best of the best at the time. Didn't pay attention to input lag. Didn't know it was a thing. Well I just picked up a 2016 4K samsung KS8500 with a 19ms input lag. Immediately I began putting up the scores I used to. Turns out my top of the line 2013 had 70+ms input lag. It's not always about price and I can attest to the importance of input lag. For COD online gaming at least

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