# MPH to KMH Convert miles per hour to kilometers per hour with configurable decimal precision > Canonical page: https://elysiatools.com/en/tools/mph-to-kmh - **Category:** Math & Numbers - **Keywords:** mph, kmh, speed, conversion, miles per hour, kilometers per hour ## Overview A quick and precise utility to convert speed from miles per hour (mph) to kilometers per hour (km/h). It allows you to set a custom decimal precision for the output, making it ideal for standardizing telemetry data, international travel planning, and accurate physics calculations. ## Inputs - **Miles per hour** (text): e.g. 60 - **Decimal Precision** (number) ## When to use - When translating US or UK speed limits into metric units for international driving or localized content. - When processing vehicle telemetry, drone logs, or GPS data that requires standardized metric speeds. - When solving physics or engineering problems that require precise speed unit conversions. ## How it works - Enter the speed value in miles per hour (mph) into the primary input field. - Adjust the decimal precision setting (from 0 to 10) to define how many decimal places the result should have. - The tool calculates the equivalent speed in kilometers per hour and outputs the result in a structured JSON format. ## Use cases - Converting US highway speed limits for European or Canadian dashboard displays. - Standardizing drone or vehicle GPS speed logs from imperial to metric units. - Creating localized automotive content or specifications for international audiences. ## Frequently asked questions ### What is the conversion formula from mph to km/h? The tool multiplies the miles per hour value by 1.609344 to calculate the exact kilometers per hour. ### Can I change the number of decimal places in the result? Yes, you can configure the decimal precision between 0 and 10 places using the precision setting. The default is 3. ### What format is the output provided in? The result is returned as a structured JSON object containing both the original mph value and the converted km/h value. ### Is this tool suitable for bulk data processing? This specific tool processes one speed value at a time, outputting a clean JSON response for easy integration or manual reading. ### Are negative speed values supported? Yes, you can input negative values if you are calculating velocity vectors in physics or engineering contexts. ## Related tools - [Acre to Hectare](https://elysiatools.com/en/tools/acre-to-hectare): Convert acres to hectares with configurable decimal precision - [Acre to Square Feet](https://elysiatools.com/en/tools/acre-to-square-feet): Convert acres to square feet with configurable decimal precision - [Acre to Square Meter](https://elysiatools.com/en/tools/acre-to-square-meter): Convert acres to square meters with configurable decimal precision - [Arcminutes to Degrees](https://elysiatools.com/en/tools/arcminutes-to-degrees): Convert arcminutes to degrees with configurable decimal precision - [Arcseconds to Degrees](https://elysiatools.com/en/tools/arcseconds-to-degrees): Convert arcseconds to degrees with configurable decimal precision - [ATM to KPa](https://elysiatools.com/en/tools/atm-to-kpa): Convert standard atmospheres to kilopascals with configurable decimal precision - [Bar to KPa](https://elysiatools.com/en/tools/bar-to-kpa): Convert bar to kilopascals with configurable decimal precision - [Bar to PSI](https://elysiatools.com/en/tools/bar-to-psi): Convert bar to pounds per square inch with configurable decimal precision ## Samples - [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion - [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion - [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion - [Web Image Processing Rust Samples](https://elysiatools.com/en/samples/web-image-processing-rust): Web Rust image processing examples including image read/save, scaling, and format conversion ## Related content - [Math & Numbers Convert Tools](https://elysiatools.com/en/hubs/math-&-numbers-convert): Explore 45 math tools for &-numbers-convert workflows and compare closely related utilities quickly. - [Audio Encoding and Format Conversion Tools](https://elysiatools.com/en/hubs/audio-convert): Compare audio format conversion, bitrate changes, sample-rate conversion, codec swaps, and export tools in one hub for delivery and archive workflows. - [Image Format Conversion and Animated Export Tools](https://elysiatools.com/en/hubs/image-convert): Compare image format converters for JPG, PNG, GIF, AVIF, WebP, TIFF, ICO, base64, and animation-friendly exports in one hub. - [JSON Interchange and Format Translation Tools](https://elysiatools.com/en/hubs/json-convert): Compare JSON conversion tools for CSV, YAML, TOML, GraphQL, XML, Markdown, Excel, BSON, EDN, and related structured formats in one hub.