Calculate Max Angular Velocity (deg/s) for FPV Drones
Determines linear sensitivity across the entire stick range. Standard range: 0.1 to 2.55.
Increases sensitivity at the ends of stick travel. Standard range: 0.00 to 0.99.
Softens sensitivity around center stick for precision. Does not affect Max Velocity in Betaflight standard rates.
Max Angular Velocity:0 deg/s
Time for 360° Roll/Flip:0.00s
Center Stick Sensitivity:Low
Understanding Betaflight Rates
Betaflight rates are the translation layer between your fingers and the drone's movement. They dictate how fast the drone rotates (in degrees per second) for a given stick position. Mastering your rates is essential for both smooth cinematic flying and aggressive freestyle or racing maneuvers.
The Three Core Variables
In the standard Betaflight rate system (Legacy), three main parameters define the feel of your quadcopter:
RC Rate: This is the baseline multiplier. Increasing RC Rate increases sensitivity linearly across the entire stick range. A higher RC Rate makes the drone feel more responsive everywhere.
Super Rate: This variable adds a curve to the response, drastically increasing sensitivity only at the outer edges of the stick movement. It allows for "snappy" rolls and flips at full stick deflection while keeping the center stick relatively calm. Note: As Super Rate approaches 1.00, the calculated max velocity approaches infinity.
RC Expo: Exponential (Expo) reduces sensitivity around the center of the stick (neutral position) without affecting the maximum rotation speed at full deflection. This is crucial for smoothing out small jitters and allowing for precise micro-corrections.
How to Use This Calculator
This calculator uses the standard Betaflight algorithm to determine your maximum angular velocity based on your inputs. Here is how to interpret the results:
Max Angular Velocity (deg/s)
This figure represents the maximum speed your drone will rotate when you push the stick 100% to the edge. For example, a rate of 667 deg/s means the drone can complete nearly two full rotations in one second.
Cinematic/Racing: Pilots often prefer rates between 400 and 700 deg/s for smoothness and control.
Freestyle: Freestyle pilots often push rates to 800-1200 deg/s to perform snappy flips and rapid adjustments.
Time for 360° Roll
This metric calculates the theoretical time it takes to complete a full 360-degree rotation at full stick deflection. It helps visualize the "snap" of the drone. A time of 0.5s means you can flip completely over in half a second.
Mathematical Formula
The standard Betaflight rate calculation for Maximum Velocity is derived as follows:
Note: This formula applies to the "Betaflight" rate type. "Actual" rates use a different linear definition where you simply type in your desired max degrees per second.
function syncSlider(inputId, sliderId) {
var inputVal = document.getElementById(inputId).value;
document.getElementById(sliderId).value = inputVal;
calculateBetaflightRates(); // Real-time update
}
function syncInput(inputId, sliderId) {
var sliderVal = document.getElementById(sliderId).value;
document.getElementById(inputId).value = sliderVal;
calculateBetaflightRates(); // Real-time update
}
function calculateBetaflightRates() {
// 1. Get input values
var rcRate = parseFloat(document.getElementById("rcRate").value);
var superRate = parseFloat(document.getElementById("superRate").value);
var rcExpo = parseFloat(document.getElementById("rcExpo").value);
// 2. Validation
if (isNaN(rcRate) || rcRate < 0) rcRate = 1.0;
if (isNaN(superRate) || superRate = 0.99) superRate = 0.99;
if (isNaN(rcExpo) || rcExpo 0) {
timeToFlip = 360 / maxVelocity;
}
// 5. Determine Center Sensitivity Description
// Center sensitivity is largely defined by RC Rate and reduced by Expo
// This is a qualitative estimation for the user
var centerSensValue = rcRate * (1 – (rcExpo * 0.5)); // rough heuristic
var centerText = "";
if (centerSensValue < 0.5) {
centerText = "Very Low (Mushy)";
} else if (centerSensValue < 0.8) {
centerText = "Low (Smooth)";
} else if (centerSensValue < 1.2) {
centerText = "Moderate (Standard)";
} else if (centerSensValue 100) percentage = 100;
document.getElementById("velocityBar").style.width = percentage + "%";
// Show results area
document.getElementById("results-area").style.display = "block";
}
// Initialize on load
window.onload = function() {
calculateBetaflightRates();
};