Quick guides for everyday calculations.

Splitting a restaurant bill

Enter the pre-tip bill, choose a tip percentage, and enter the number of people. The tool shows the total tip, final bill, and an equal per-person share. Adjust individual shares separately when orders were very different.

Converting units correctly

Choose the unit you have and the unit you need. Keep a few extra decimal places during intermediate calculations, then round only the final result.

Creating stronger passwords

Long, unique passwords are generally safer than short reused passwords. Store important credentials in a reputable password manager and enable multi-factor authentication when available.

Estimating reading time

The word counter estimates reading time at roughly 225 words per minute. Technical or unfamiliar material may take longer.

These guides are educational and not financial, medical, or legal advice.