About Embedwise
Free embedded engineering calculators. No account required.
Why this exists
Every embedded project involves the same dozen calculations: baud rate divisors, pull-up resistor limits, battery runtime, CRC polynomials. I was computing these by hand or digging through datasheets on every new board bring-up.
Embedwise is the bookmark I wanted — 26 calculators in one place, with MCU register values, real-world context, and the math explained. No login, no ads tracking you across the internet, no paywalled "pro" tier.
Who built it
Bob Peters
CTO at Imbu, an embedded engineering firm in the Netherlands building industrial automation and IIoT hardware. Day job is nRF52, Zephyr RTOS, LoRa, UWB, CAN/J1939, GPS/GNSS, and MEMS sensors.
I build Embedwise in my spare time as part of a small portfolio of engineering tools. All the content is written from field experience — the common mistakes sections are things I've actually debugged.
How it's built
Static site built with Astro — HTML pages pre-rendered at build time, React only where a calculator needs interactivity. Calculator logic runs entirely in the browser. No server, no database, no API calls on page load.
Deployed on Cloudflare Pages. Source is on GitHub. Every calculation is client-side — if you lose your internet connection mid-calculation, it still works.
Corrections & suggestions
Found a calculation error? Know a gotcha I missed? Want a calculator that isn't here yet? Email me directly at bob@embedwise.com. I read every message.
Get the tools
26 calculators covering protocol timing, passive components, power budgets, and firmware tooling.
Browse calculators →