frametime calculator

What Is Frametime?

Frametime is the amount of time your system needs to render one frame, usually measured in milliseconds (ms). If your GPU outputs one frame every 16.67 ms, you are running at about 60 FPS. If it renders one frame every 6.94 ms, you are around 144 FPS.

Many gamers focus only on FPS, but frametime is often the better performance signal for smoothness. Two systems can both average 120 FPS, yet one can feel far smoother if its frametimes are consistent and stable.

FPS to Frametime Formula

The core conversion is simple:

• Frametime (ms) = 1000 / FPS
• FPS = 1000 / Frametime (ms)

Quick examples:

• 30 FPS = 33.33 ms
• 60 FPS = 16.67 ms
• 120 FPS = 8.33 ms
• 144 FPS = 6.94 ms
• 240 FPS = 4.17 ms

Why Frametime Matters More Than Average FPS

1) Frame Pacing and Smooth Motion

Smooth gameplay depends on even delivery of frames. If your game alternates between 4 ms and 20 ms frame durations, motion feels uneven even when average FPS looks high. Stable frametimes produce cleaner camera pans and less visible microstutter.

2) Input Responsiveness

Lower frametime generally means lower render delay. This is especially important in shooters, racing games, and competitive titles where response speed matters.

3) Better Optimization Decisions

Frametime graphs expose real bottlenecks. Spikes often reveal background tasks, CPU limits, shader compilation, poor asset streaming, thermal throttling, or VRAM pressure. FPS averages can hide all of that.

Frame Budget by Refresh Rate

Each refresh rate gives you a strict per-frame time budget. To avoid dropped frames, your render time should stay at or below this number.

Refresh Rate	Frame Budget (ms)	Equivalent FPS Target
60 Hz	16.67 ms	60 FPS
75 Hz	13.33 ms	75 FPS
120 Hz	8.33 ms	120 FPS
144 Hz	6.94 ms	144 FPS
165 Hz	6.06 ms	165 FPS
240 Hz	4.17 ms	240 FPS

How to Use This Frametime Calculator

• Enter your measured average FPS from a benchmark overlay, or enter frametime in ms.
• Add your monitor refresh rate to compare against a real frame budget.
• Optionally add 1% low FPS to estimate stutter severity.
• Use the results to decide whether to reduce settings, cap frame rate, or tune CPU/GPU load.

Interpreting 1% Lows and Spikes

The 1% low metric approximates worst-case frame delivery. If your average is 144 FPS but your 1% low is 70 FPS, your experience may feel choppy during effects-heavy scenes. The calculator converts that 1% low to frametime so you can compare best-case and worst-case frame durations directly.

Practical Tips to Improve Frametime Stability

• Cap FPS slightly below monitor max (for example, 141 on 144 Hz) to reduce spikes.
• Use VRR technologies like G-Sync or FreeSync when available.
• Lower CPU-heavy settings first: shadows, crowd density, simulation distance.
• Avoid background tasks that cause intermittent CPU scheduling stalls.
• Keep GPU drivers updated and monitor temperatures to prevent throttling.
• Install games on SSDs to reduce streaming hitching.

FAQ

Is lower frametime always better?

Yes, but consistency is just as important. A flat 8.3 ms line feels better than wildly fluctuating values with the same average.

Can I be GPU-bound with high FPS?

Absolutely. At high refresh rates, even small graphics spikes can exceed your frame budget and create visible stutter.

What frametime should I target?

Match your display target. For 60 Hz, stay near or under 16.67 ms. For 144 Hz, stay near or under 6.94 ms. For competitive play, prioritize low and stable frametime over maximum visual settings.