Compare frame rates and calculate performance gains or losses.
FPS
FPS
Percentage Change:–
FPS Difference:–
Base Frame Time:–
New Frame Time:–
Latency Reduction:–
function calculateFrameRate() {
var oldFpsInput = document.getElementById('oldFps');
var newFpsInput = document.getElementById('newFps');
var oldFps = parseFloat(oldFpsInput.value);
var newFps = parseFloat(newFpsInput.value);
var resultsDiv = document.getElementById('results');
if (isNaN(oldFps) || isNaN(newFps) || oldFps <= 0 || newFps 0 ? "+" : "") + difference.toFixed(1) + " FPS";
// Styling based on positive or negative change
if (percentageChange > 0) {
percentEl.className = "result-value positive-change";
diffEl.className = "result-value positive-change";
} else if (percentageChange 0) {
savedTimeEl.innerText = "-" + timeSaved.toFixed(2) + " ms (Faster)";
savedTimeEl.className = "result-value positive-change";
} else if (timeSaved < 0) {
savedTimeEl.innerText = "+" + Math.abs(timeSaved).toFixed(2) + " ms (Slower)";
savedTimeEl.className = "result-value negative-change";
} else {
savedTimeEl.innerText = "0 ms";
savedTimeEl.className = "result-value";
}
resultsDiv.style.display = 'block';
}
Understanding Frame Rate Percentage and Performance
In the world of PC gaming, console performance, and video production, Frame Rate (FPS) is the gold standard metric for fluidity and responsiveness. However, looking at raw FPS numbers can sometimes be misleading. Calculating the percentage change gives a much clearer picture of the actual performance value you get from a hardware upgrade or a settings tweak.
This calculator helps you determine the exact percentage increase or decrease between two frame rates, while also converting those values into Frame Time (milliseconds), which is arguably a more important metric for input lag and smoothness.
Why Calculate Percentage Change?
A simple addition of 30 FPS does not always mean the same thing for performance:
Scenario A: Going from 30 FPS to 60 FPS is a +30 FPS increase. This represents a 100% performance boost, resulting in a visually transformative experience.
Scenario B: Going from 120 FPS to 150 FPS is also a +30 FPS increase. However, this is only a 25% increase. While noticeable, it is far less impactful than Scenario A.
Using percentages allows you to objectively evaluate the "Return on Investment" for buying a new graphics card or lowering your game's graphical settings.
The Importance of Frame Time (ms)
While gamers obsess over FPS, the computer actually renders frames in milliseconds. FPS is simply how many of those frames fit into one second. The relationship is inverse and non-linear.
Formula: Frame Time (ms) = 1000 / FPS
This calculator provides the frame time conversion because of the law of diminishing returns:
30 FPS = 33.33ms per frame
60 FPS = 16.66ms per frame (You save 16.6ms of latency)
120 FPS = 8.33ms per frame (You save an additional 8.3ms)
240 FPS = 4.16ms per frame (You only save roughly 4.2ms more)
As you reach higher frame rates, the actual time saved per frame decreases, making percentage gains harder to achieve and less noticeable to the human eye.
How to Use This Calculator
Original Frame Rate: Enter your current average FPS (e.g., benchmark results from your old GPU).
New Frame Rate: Enter the average FPS of the new hardware or the target FPS you hope to achieve.
Calculate: Click the button to see the percentage difference and the reduction in frame processing time.
Common Frame Rate Standards
24 FPS: Standard for movies and cinema.
30 FPS: Standard for older console games and non-interactive video.
60 FPS: The "Gold Standard" for fluid gaming.
144 FPS / 165 FPS: The competitive standard for Esports titles.
240 FPS+: Professional level competitive gaming where every millisecond of latency counts.