What Is Refresh Rate and How to Check Yours

Refresh rate is the most quietly wasted money in PC hardware. People pay for a 144 Hz or 165 Hz monitor, plug it in, and run it at 60 Hz for years, because nothing ever tells them. The box spec is a capability, not a setting. This guide explains what refresh rate actually is, how to measure the rate you are really getting, and how to fix the chain when the two numbers disagree.

What refresh rate means

Your display redraws its image many times per second. Refresh rate, measured in hertz (Hz), is how many times. At 60 Hz the picture updates every 16.7 milliseconds; at 144 Hz, every 6.9 ms; at 240 Hz, every 4.2 ms. More updates mean motion is sampled more finely: a moving object is drawn in more intermediate positions, so movement looks smoother, cursor and window motion feels more direct, and in games you see newer information sooner. It is not the same as frame rate — frames per second is how many images your computer produces, refresh rate is how many the display can show — and the lower of the two is what you actually experience.

How to check your real refresh rate

Do not trust the box, the invoice, or the monitor's marketing sticker. Open the refresh rate test on this site. It times the animation frames your browser is actually receiving and reports the measured rate, using the median frame interval so a stray hiccup cannot skew the result. Watch the two moving blocks as well: the full-rate block glides while the half-rate block visibly steps. If both look identical and the readout says 60, your display chain is delivering 60 Hz, whatever the panel supports.

One measurement warning matters: browsers cap pages embedded inside other apps or preview frames at 60 frames per second. If you are viewing a test inside an app window and it reads exactly 60, open the site in its own browser tab and measure again before concluding anything.

Fix 1: The operating system setting

The most common cause is embarrassingly simple: the OS is set to 60 Hz. On Windows, open Settings, then System, then Display, then Advanced display, and choose the highest refresh rate offered for that monitor. On a Mac, open System Settings, then Displays, and check the refresh rate pop-up — it may only appear when the display is selected and, on some models, when you hold Option to reveal rates. Change it, then re-run the test to confirm the change actually took effect.

Fix 2: The cable and the port

Cables and ports carry bandwidth limits. Older HDMI connections can cap high-resolution displays at 60 Hz even when both ends support more; DisplayPort, or a newer HDMI cable into a newer HDMI port, often unlocks the full rate. Not all ports on a monitor — or on a laptop — are equal, either: one HDMI port may be a faster standard than the other, and on laptops some ports connect through the integrated graphics with tighter limits. If the OS refuses to offer your panel's rate, a different cable into a different port is the highest-value experiment you can run. The same bandwidth logic is why a dock or a cheap adapter can silently cap you.

Fix 3: Laptops, batteries and second screens

Some laptops reduce refresh rate on battery power to save energy, and restore it on mains — test plugged in before diagnosing. With multiple monitors, each display has its own setting, and dragging a window between a 144 Hz and a 60 Hz screen can make the faster one look wrong by comparison. Gamers should also check the game's own display settings, which may cap frame rate independently of the desktop.

Is higher always better?

For gaming, motion clarity and general desktop smoothness, yes — the jump from 60 to 120 or 144 Hz is the one most people feel immediately; beyond 240 Hz, returns diminish for all but competitive players. For office work the benefit is comfort rather than capability. Either way, the principle of this site applies: measure, do not assume. While you are checking your display, run the gradient and colour test for banding and crushed blacks, and if games also feel unresponsive, pair this with the audio latency test and our game controller guide to cover the whole input-to-display chain. Specs on paper are covered in How to Check Your PC Specs and What They Mean.

Refresh rate, frame rate and the settings that cap both

One confusion survives every explanation, so let us settle it with your own two numbers. Your refresh rate is a property of the display chain — panel, cable, port and OS setting — and the test on this page measures it directly. Your frame rate is a property of the work: how many images per second your computer can produce in a given game or app. When frame rate is lower than refresh rate, you see the frame rate; adaptive sync technologies such as G-Sync and FreeSync exist to make the display wait for the computer gracefully in exactly that case, rather than tearing the picture. When frame rate exceeds refresh rate, the extra frames are simply never shown. The practical conclusion is to fix the chain in order: panel set correctly in the OS, cable and port capable of carrying it, then per-app caps removed. Each step is measurable with the test, so you never have to wonder whether a change worked — re-run it and read the number.