Speed Converter — m/s, km/h, mph, knots & Mach

Easiest Converter’s speed converter gives instant, accurate results for everyday travel, logistics, cycling and running paces, aviation, and engineering problems. Convert between meters per second (m/s), kilometers per hour (km/h), miles per hour (mph), feet per second (ft/s), knots (kn), and Mach (sea-level approximation) with clean, readable output.

Results are referenced to meters per second for consistent math across metric and imperial systems. Popular pairs include km/h ⇄ mph for driving, m/s ⇄ km/h for physics and sport science, and knots ⇄ mph for marine and aviation use. When comparing high-speed flows or aircraft performance, use Mach (approx. 340.29 m/s at sea level) for an at-a-glance ratio to the speed of sound.

Why use this speed converter? The interface is tuned for clarity—keyboard-friendly inputs, a one-tap swap button, and copy-to-clipboard output. Numbers are formatted for sensible precision, avoiding cluttered decimals while keeping results trustworthy for reports, dashboards, and training logs.

Supported units: m/s, km/h, mph, ft/s, kn, and Mach. Whether you’re planning a trip, timing a run, calibrating sensors, or interpreting spec sheets, this converter keeps your calculations fast, consistent, and easy to share.

• Use ⇄ to swap “From” and “To” instantly.
• Click 📋 to copy a neat result string for notes or chats.
• Pick mph for US road speeds, km/h for international, and knots for nautical/aviation contexts.