PC Frame Rate Calculator & Resolution Scaler
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
line-height: 1.6;
color: #333;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background-color: #f4f7f6;
}
.calculator-container {
background-color: #ffffff;
padding: 30px;
border-radius: 12px;
box-shadow: 0 4px 15px rgba(0,0,0,0.1);
margin-bottom: 40px;
border-top: 5px solid #007bff;
}
h1 {
text-align: center;
color: #2c3e50;
margin-bottom: 10px;
}
h2 {
color: #2c3e50;
margin-top: 30px;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
}
.calc-description {
text-align: center;
color: #666;
margin-bottom: 25px;
font-size: 0.95em;
}
.input-group {
margin-bottom: 20px;
}
.row {
display: flex;
gap: 20px;
flex-wrap: wrap;
}
.col {
flex: 1;
min-width: 200px;
}
label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #444;
}
input[type="number"], select {
width: 100%;
padding: 12px;
border: 1px solid #ddd;
border-radius: 6px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
input[type="number"]:focus, select:focus {
border-color: #007bff;
outline: none;
}
.btn-calculate {
display: block;
width: 100%;
padding: 15px;
background-color: #007bff;
color: white;
border: none;
border-radius: 6px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
transition: background-color 0.3s;
margin-top: 10px;
}
.btn-calculate:hover {
background-color: #0056b3;
}
.result-box {
margin-top: 25px;
padding: 20px;
background-color: #f8f9fa;
border-radius: 8px;
border-left: 5px solid #28a745;
display: none;
}
.result-value {
font-size: 2em;
font-weight: bold;
color: #28a745;
text-align: center;
margin: 10px 0;
}
.result-label {
text-align: center;
color: #555;
font-size: 0.9em;
text-transform: uppercase;
letter-spacing: 1px;
}
.secondary-metrics {
display: flex;
justify-content: space-around;
margin-top: 15px;
padding-top: 15px;
border-top: 1px solid #e9ecef;
text-align: center;
}
.metric-item strong {
display: block;
font-size: 1.2em;
color: #333;
}
.metric-item span {
font-size: 0.85em;
color: #777;
}
article {
background: white;
padding: 30px;
border-radius: 12px;
box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
article p {
margin-bottom: 1.5em;
}
article ul {
margin-bottom: 1.5em;
padding-left: 20px;
}
article li {
margin-bottom: 0.5em;
}
.tooltip {
font-size: 0.8em;
color: #888;
margin-top: 4px;
}
/* Tab switching for different tools */
.tool-switcher {
display: flex;
margin-bottom: 20px;
border-bottom: 2px solid #eee;
}
.tool-tab {
padding: 10px 20px;
cursor: pointer;
font-weight: 600;
color: #666;
}
.tool-tab.active {
color: #007bff;
border-bottom: 2px solid #007bff;
margin-bottom: -2px;
}
PC Frame Rate Calculator
Estimate FPS changes when changing resolutions or converting frame times.
Understanding PC Frame Rates and Performance
Whether you are building a new gaming PC or upgrading your monitor, understanding how resolution impacts your Frame Rate (FPS) is crucial. This PC Frame Rate Calculator helps you estimate potential performance changes when upgrading your display or tweaking game settings.
How Resolution Affects FPS
The relationship between screen resolution and FPS is largely defined by the number of pixels your GPU needs to render. When you increase your resolution (e.g., from 1080p to 1440p), the pixel count increases significantly, which usually results in a lower frame rate if your GPU is the bottleneck.
- 1080p (1920×1080): Approximately 2.07 million pixels. Standard for competitive gaming.
- 1440p (2560×1440): Approximately 3.69 million pixels. Requires about 78% more rendering power than 1080p.
- 4K (3840×2160): Approximately 8.29 million pixels. Requires 4x the rendering power of 1080p.
This calculator uses the pixel ratio method to estimate your new FPS. While real-world performance depends on game optimization, CPU bottlenecks, and GPU architecture, the pixel count ratio provides a solid baseline for what to expect.
Frame Time vs. FPS
While gamers often focus on FPS (Frames Per Second), "Frame Time" is often a more accurate metric for smoothness. Frame time measures how many milliseconds it takes to render a single frame.
Lower frame times are better. A stable 16.6ms frame time results in a locked 60 FPS. If your frame time fluctuates wildly (e.g., jumping between 16ms and 33ms), the game will feel stuttery even if the average FPS looks high. This calculator includes a converter to help you understand the relationship between these two metrics.
Optimizing Your Frame Rate
If your estimated FPS at a higher resolution is too low, consider these tips:
- Upscaling Technologies: Use DLSS (NVIDIA) or FSR (AMD) to render at a lower resolution and upscale to your monitor's native resolution.
- Lower Shadow Quality: Shadows are often the most demanding setting. lowering them from Ultra to High or Medium can yield significant FPS gains.
- Check CPU Bottlenecks: If lowering resolution doesn't increase your FPS, your CPU might be the limiting factor, not your GPU.
function switchTool(tool) {
// Hide all tools
document.getElementById('tool-scaling').style.display = 'none';
document.getElementById('tool-frametime').style.display = 'none';
// Remove active class from tabs
document.getElementById('tab-scaling').className = 'tool-tab';
document.getElementById('tab-frametime').className = 'tool-tab';
// Show selected tool and activate tab
document.getElementById('tool-' + tool).style.display = 'block';
document.getElementById('tab-' + tool).className = 'tool-tab active';
}
function calculateScaling() {
var fps = parseFloat(document.getElementById('currentFps').value);
var w1 = parseFloat(document.getElementById('currResWidth').value);
var h1 = parseFloat(document.getElementById('currResHeight').value);
var w2 = parseFloat(document.getElementById('targetResWidth').value);
var h2 = parseFloat(document.getElementById('targetResHeight').value);
if (isNaN(fps) || isNaN(w1) || isNaN(h1) || isNaN(w2) || isNaN(h2)) {
alert("Please enter valid numbers for all fields.");
return;
}
if (fps <= 0 || w1 <= 0 || h1 <= 0 || w2 <= 0 || h2 0 ? "+" : "";
document.getElementById('pixelCountDiff').innerText = pixelSign + pixelDiff.toFixed(1) + "%";
document.getElementById('pixelCountDiff').style.color = pixelDiff > 0 ? "#dc3545" : "#28a745"; // Red if more pixels (harder), Green if less
// Format performance impact
var perfSign = perfDiff > 0 ? "+" : "";
document.getElementById('perfImpact').innerText = perfSign + perfDiff.toFixed(1) + "%";
document.getElementById('perfImpact').style.color = perfDiff >= 0 ? "#28a745" : "#dc3545″; // Green if more FPS, Red if less
}
function convertFrameTime() {
var msInput = document.getElementById('inputMs').value;
var fpsInput = document.getElementById('inputFps').value;
var resultBox = document.getElementById('converterResult');
var resFps = document.getElementById('resFps');
var resMs = document.getElementById('resMs');
// Determine which way to convert based on what was last edited or filled
// Simple logic: if MS is filled, calc FPS. If FPS is filled, calc MS. Priority to MS if both.
var ms = parseFloat(msInput);
var fps = parseFloat(fpsInput);
if (!isNaN(ms) && ms > 0) {
// Convert MS to FPS
var calculatedFps = 1000 / ms;
resMs.innerText = ms + " ms";
resFps.innerText = calculatedFps.toFixed(1) + " FPS";
resultBox.style.display = 'block';
} else if (!isNaN(fps) && fps > 0) {
// Convert FPS to MS
var calculatedMs = 1000 / fps;
resFps.innerText = fps + " FPS";
resMs.innerText = calculatedMs.toFixed(2) + " ms";
resultBox.style.display = 'block';
} else {
alert("Please enter a valid Frame Time or FPS value.");
}
}