What this site is
ToolLamp is a collection of small tools for everyday tasks and electronics work, such as a date difference calculator, a resistor color code calculator and a voltage divider calculator. Every tool is available in English and Traditional Chinese. Each tool does one job and works as soon as the page loads.
Who runs it
ToolLamp is built and maintained by a firmware engineer in Taiwan, in their spare time.
What matters here
- Correct results. Every calculation is covered by automated tests, and changes go live only when all tests pass.
- Your data stays on your device. Everything runs in your browser and nothing you type is uploaded. See the privacy policy.
- Simple pages. No sign-up, no pop-ups, and usable on a phone.
How the site is funded
The tools are free. Some pages may later include clearly marked affiliate links, and ads may be added in the future, to pay for the time spent on the site. Recommendations never change a tool’s results.
Found a mistake or want a new tool?
If you spot a wrong result or a typo, or want a tool added, please let me know on the contact page.