About 123Calculator

123Calculator provides 30 fast, free and easy-to-use online calculators spanning finance, health & fitness, math and everyday utilities. There is nothing to install and no sign-up required — just open a calculator and get your answer.

How it works

Every calculator runs the moment you press Calculate. Your inputs are passed in the page URL, which means results are fully shareable and bookmarkable — copy the address bar to send a specific calculation to someone else. The calculators also work with JavaScript disabled, because the math happens on the server.

Categories

• Financial — Loans, mortgages, interest, savings, taxes and investing.
• Fitness & Health — BMI, calories, body fat, pace, pregnancy and more.
• Math — Percentages, fractions, geometry, statistics and algebra.
• Other — Dates, time, GPA, conversions and handy everyday tools.

A note on accuracy

These tools are provided for general information and educational purposes. While we aim for accuracy, results are estimates and should not be treated as professional financial, medical, legal or tax advice. Always consult a qualified professional before making important decisions.