Small, fast tools that run on your device

icupu is a home for useful little tools: free, no sign-up, and built to do the work in your browser.

Tools

• icupu Percentage Calculator

  Type a question like “how much is an 18% tip on $64?” or “rent went up from 1,450 to 1,595” and get the answer with the working shown, or use six classic calculators. Understands English, Portuguese and Spanish.

  Open the calculator Also in Português · Español

Who is behind it

icupu is made by Emanoel S. Vieira. The model behind the calculator's smart mode, percent-nlu, is open source: code on GitHub, weights and model card on Hugging Face, package on npm.