CalcBundle is a free collection of calculators for money, health, math and everyday numbers, built to give clear answers without sign-ups or clutter.
CalcBundle brings together over a hundred calculators in one place. You will find financial tools such as mortgage, loan, retirement, tax and salary calculators, health and fitness tools such as BMI, calorie and pregnancy calculators, and math and everyday tools such as percentages, fractions, unit conversion and date calculators. Each one is a simple page: type in your numbers, and the result and a plain-language explanation appear next to them.
We start from the standard formula behind each calculation, then study how well-known calculators and official sources handle it. We build our own version with its own code and wording, and we compare its answers against reference results across many different inputs before it goes live. Where an official rule exists, such as a tax bracket or a retirement-account limit, we follow the rule itself, and where a calculator's usual shortcut gives a different answer from the rule, we say so on the page.
Every calculator page also explains how the numbers are worked out, what the assumptions are, and answers common questions, so you can see why you got a result and not just what it is.
The calculators run in your own browser. The figures you type in are not sent to us, because there is no server on our side to receive them. You can read more about this, and about how the site is measured and funded, on the Privacy page.
CalcBundle is for estimating and learning. Results depend on the inputs and assumptions you choose, and real life, such as a lender's exact terms, a doctor's advice or your tax return, can differ. Nothing here is financial, medical, legal or tax advice. Please see the Terms of Use, and check important decisions with a qualified professional.
We keep improving the calculators and adding new ones. Tax limits, retirement rules and similar figures change from year to year, and we update the calculators when they do. If you ever see a result that looks wrong, or a calculator you would like us to build, we want to hear about it. Write to us at neunextltd@gmail.com or use the Contact page.