Daily life

Work out the tip and total to pay in the US, with presets from 15% to 25% and an even bill split for groups.

Split a restaurant check evenly among any number of people, tip included, in seconds.

Get your exact age in years, months, days and hours from your date of birth, handy for retirement and benefit eligibility checks.

Work out your real-world MPG (US gallon) from miles driven and gallons used, plus the cost of a trip at the current pump price.

Find the earliest date to file Form N-400: 5 or 3 years of residence, the 90-day early filing rule, 913 or 548 days of physical presence and trips abroad.