Understanding Your FPS Estimate
Our FPS calculator uses hardware performance scores and game profiles to estimate how well your PC will run different titles. Use this guide to understand how your hardware and settings dictate your final frame rate.
How to Use the FPS Calculator
To get the most accurate frame rate estimate for your gaming setup, follow these steps:
- Select Your Hardware: Input your exact CPU and GPU. The calculator scales performance based on the specific capabilities of these components.
- Choose a Game: Different games have vastly different engine demands. Selecting a game applies the correct baseline workload.
- Adjust Resolution & Settings: Set your target monitor resolution (e.g., 1440p) and your preferred graphics quality. Higher visual fidelity increases the GPU workload.
- Configure Advanced Tech: If your hardware supports it, enable Ray Tracing, Upscaling (DLSS/FSR), or Frame Generation to see how modern rendering techniques impact performance.
- Calculate: Click "Calculate FPS" to generate your estimated average frame rate, 1% lows, and identify your primary system limitation.
How Our FPS Calculator Estimates Performance
The FPS results generated above are mathematical model estimates, not guaranteed laboratory benchmarks. The calculator predicts your performance by analyzing:
- Game Profiles: We apply a baseline workload that defines how heavily a specific game relies on the CPU versus the GPU.
- Hardware Performance: Your selected CPU and GPU are assigned synthetic and rasterization scores based on their computational power.
- Settings Adjustments: The model dynamically adjusts the expected frame rate based on the pixel count of your resolution and the complexity of your graphics preset.
- Upscaling & Frame Gen: If enabled, we apply fixed multipliers to represent the typical performance gains provided by DLSS, FSR, or Frame Generation.
- Memory Ceilings: The calculator checks if your system RAM or GPU VRAM might fall below estimated requirements, which applies penalties to frame consistency (1% lows) if a bottleneck is detected.
What Affects FPS?
CPU Performance
Your processor acts as the director of the game. It handles game logic, physics, artificial intelligence, and most importantly, prepares rendering instructions (draw calls) for the GPU. If your CPU cannot prepare these instructions fast enough, your graphics card will sit idle waiting for work, limiting your maximum FPS.
GPU Performance
The graphics card does the heavy lifting of drawing the actual pixels on your screen. It handles lighting, complex geometry, shadows, textures, and post-processing effects. For the vast majority of modern AAA games played at high resolutions, the GPU is the primary component determining your frame rate.
Resolution
Resolution dictates the total number of pixels your GPU must render every single frame. Because pixel count scales exponentially, increasing your resolution causes a massive increase in GPU workload.
| Resolution | Pixels per Frame | Relative Pixel Load | Typical Gaming Use |
|---|---|---|---|
| 1080p (FHD) | ~2.07 Million | Baseline (1x) | Esports, high-refresh rate gaming, budget builds. |
| 1440p (QHD) | ~3.68 Million | +77% higher than 1080p | The sweet spot for modern mid-to-high-end gaming PCs. |
| 4K (UHD) | ~8.29 Million | 4x the pixels of 1080p | Enthusiast setups requiring top-tier GPUs. |
Graphics Settings
In-game presets scale the visual fidelity of the world. Lowering these settings is usually the fastest way to improve performance when you are GPU-limited.
| Setting | Visual Quality | Performance Impact | When to Use |
|---|---|---|---|
| Low | Basic lighting, low-res textures, minimal shadows. | Lightest workload, maximizes FPS. | Competitive gaming or playing on older hardware. |
| Medium | Good balance of textures and essential effects. | Moderate impact. | When targeting 60 FPS on entry-level systems. |
| High | Excellent detail, shadows, and draw distance. | Heavy impact. | Recommended for most gamers for the best visual/performance balance. |
| Ultra | Uncompressed textures, maximum geometry. | Extremely heavy impact. | When you have excess GPU power and want uncompromised visuals. |
Ray Tracing
Ray Tracing realistically simulates the physical behavior of light. While it provides stunning global illumination and reflections, it shifts a massive computational workload onto the dedicated RT cores of your GPU. Enabling it typically reduces your expected FPS substantially unless paired with an upscaler.
Upscaling
Upscaling technologies improve frame rates by rendering the game at a lower internal resolution, then intelligently reconstructing the image to match your monitor's native resolution.
| Technology | Main Purpose | Hardware Support | Typical Benefit |
|---|---|---|---|
| NVIDIA DLSS | AI-driven image reconstruction. | Exclusive to NVIDIA RTX GPUs. | Significant FPS gains with often native-like image quality. |
| AMD FSR | Spatial and temporal upscaling. | Works on most modern AMD, NVIDIA, and Intel GPUs. | Broadly compatible performance boosts across many games. |
| Intel XeSS | AI-driven reconstruction (on Arc) or DP4a spatial upscaling. | Best on Intel Arc GPUs; falls back on other brands. | Strong image quality on supported hardware. |
Frame Generation
Frame Generation uses AI to predict and insert completely synthetic frames between traditionally rendered frames. This makes the motion on your screen look incredibly smooth. However, because these frames are generated after the fact, they do not improve the underlying input latency (responsiveness) of the game.
CPU vs GPU Bottlenecks
A "bottleneck" simply refers to the component in your system that reaches its maximum capacity first, limiting the performance of the rest of the PC.
| Situation | Likely Limitation | What to Try |
|---|---|---|
| Low resolution (1080p) / Very high FPS | CPU Limited | Upgrade CPU, or use faster RAM. |
| High resolution (4K) or Heavy Ray Tracing | GPU Limited | Enable DLSS/FSR, lower resolution, or reduce graphics settings. |
| Simulation or Strategy games (e.g. Flight Sim) | CPU Limited | Lower crowd density, physics, or simulation complexity. |
| Story-driven AAA graphical showcases | GPU Limited | Lower shadows, volumetric lighting, and texture resolution. |
Average FPS vs 1% Lows
Looking only at your average frame rate can be deceiving. A smooth gaming experience requires consistency.
| Metric | What it Measures | Why it Matters | How to Interpret |
|---|---|---|---|
| Average FPS | The overall total frames generated per second over a set period. | Indicates the general speed and capability of your hardware. | A high average means your PC can handle the workload under normal conditions. |
| 1% Low | The average frame rate of the slowest 1% of frames rendered. | Indicates stuttering, freezing, and overall game smoothness. | If your average is 120 FPS but your 1% low is 30 FPS, the game will feel stuttery and unresponsive. |
Insufficient system RAM or overflowing GPU VRAM are common culprits for poor 1% lows, as the PC is forced to swap data to slower storage drives.
Frequently Asked Questions
What is an FPS calculator?
How accurate is an FPS calculator?
Why can my real FPS differ from the estimate?
Does FPS depend more on the CPU or GPU?
Does lowering resolution always increase FPS?
What are 1% lows?
Why does FPS change between games?
How does ray tracing affect FPS?
What do DLSS, FSR and XeSS do?
What does Frame Generation do?
How does RAM affect FPS?
How can I improve FPS if my result is low?
More PC Tools
Use our suite of free PC tools to plan and optimise your build: