What formula converts pulse width to angle?

Angle = ((pulse − minPulse) / (maxPulse − minPulse)) × rotationRange. This maps the pulse linearly from 0° to the full rotation range. For a standard servo: ((1500 − 500) / (2500 − 500)) × 180 = 90°.

What is the standard servo pulse range?

Most standard RC servos accept 500–2500 µs with a 180° range. The 1500 µs midpoint corresponds to the neutral (90°) position. Some servos use the narrower 1000–2000 µs range by default.

What is a micro servo preset?

Micro servos (e.g., SG90) typically operate over 1000–2000 µs with a 90° or 180° rotation range. This calculator ships with a 1000–2000 µs / 90° preset as a common starting point — check your datasheet for exact values.

What PWM frequency do servos use?

Standard RC servos expect a 50 Hz PWM signal (20 ms period). The duty cycle pulse (500–2500 µs) occurs once per cycle. This calculator focuses on the pulse width only, not the carrier frequency.

Why does my servo not reach the full angle?

Physical travel may be mechanically limited below the electrical range. If the pulse range in your code does not match the servo's rated range, the effective angle will be shorter. Use this tool to find the pulse for the exact angle you need, then tune the min/max in your firmware.

PWM to Servo Angle Calculator

Name: PWM to Servo Angle Calculator
Availability: InStock
Author: Nham Vu

Convert a PWM pulse width (µs) to a servo angle, or an angle back to pulse width, with configurable pulse range and rotation limits.

Servo Configuration

Preset

Standard servo: 500–2500 µs, 180° rotation.

Min Pulse Width (µs)

Max Pulse Width (µs)

Rotation Range (°)

Shaft Position

Pulse Width → Angle

Pulse Width (µs)

Angle (°)

Drag to adjust pulse

Angle → Pulse Width

Angle (°)

Pulse Width (µs)

Drag to adjust angle

Quick Reference Table

Angle	Pulse (µs)	% Travel

Copied!

Summary

Convert a PWM pulse width (µs) to a servo angle, or an angle back to pulse width, with configurable pulse range and rotation limits.

How it works

Select a preset (Standard or Micro) or enter custom Min Pulse, Max Pulse, and Rotation Range values.
Enter a pulse width in microseconds to calculate the corresponding servo angle.
Or enter an angle in degrees to calculate the required pulse width.
The calculator clamps the output to the configured range and displays both results simultaneously.
Use the copy button to copy any result to the clipboard.

Use cases

Calibrate RC servo motors by finding the pulse width for a specific angle.
Verify PWM output from a microcontroller (Arduino, Raspberry Pi, ESP32) maps to the expected angle.
Convert servo angle commands to pulse widths for a PWM driver library.
Debug flight controller servo endpoints during RC plane or drone setup.
Determine neutral position pulse width for steering servos in robotics projects.
Compare pulse-width ranges across different servo brands and models.

Frequently Asked Questions

Last updated: 2026-07-24 · Reviewed by Nham Vu