On this page you’ll find a vast collection of investment calculators, economics calculators, health calculators, finance calculators, and some random tools we’ve created over the past decade. We embrace the philosophy that the best way to understand the data is to get a feel for it...
We hope you enjoy using these interactive tools as much as we enjoyed making them. Oh – and we take requests. Get in touch.
Looking for the true return on an index or security? Working on metrics or valuation? Included are DRIP calculators for individual stocks, S&P 500 returns, Dow Jones returns, Bitcoin returns, corporate bond returns (of various grades), and all manner of other commodity and index return calculators.
Price and index return calculators, usually with inflation adjustment and dividend or coupon reinvestment.
Calculators for individual stock returns (and reinvested dividends) or various forms of stock valuation.
Calculators and tools demonstrating and teaching finance basics.
Compute bank and depository institution ratios, valuation metrics, and liquidity metrics.
Historical simulations, periodic re-investment tools, private investment utilities, and other investment calculators that just didn’t fit somewhere else.
Income is our most popular topic – people love to compare salaries and see the top 1% in the country by various breakdowns. These calculators let you explore the United States income distribution, or size up job offers and area demographics in different states and cities.
Income is what you earn, but net worth is what you’ve kept. The net worth calculators break down net worth with and without a house, and also dig into other specific forms of wealth.
These calculators show demographics, simulate economic models, model taxes, or compute the effects of inflation.
Economics and investment calculators are useful to see the distribution of resources and model past results. Personal finance calculators, on the other hand, help you examine your own situation.
While many things are replaceable, you only get one body in this life. These health calculators help you compare your physical health as well as see the distribution for the United States.
BMI, or Body Mass Index, is a ratio between height and weight that roughly can sort people into healthy or unhealthy body status.
Body fat percentage is a superior method to BMI which estimates health status by isolating the amount of body fat a person carries on their body.
Height and weight are – well, the single dimension of height and weight for a human. Enjoy!
Do you work out, do cardio, or otherwise push your body in a structured way? Here are calculators related to fitness.
Math is the primary reason for calculators in the first place – probably followed by applied mathematics calculators for military purposes. These calculators give you quick answers to common math and geometry questions.
Whether you're finding angles and lengths of the sides of right triangles, or using your trig or hyperbolic math for more complex computations we've got you covered with this set of tools.
Sometimes you just need to convert from one thing to another. These calculators will take the pain out of all of your number and unit conversion.
Some calculators don’t fit in the other sections! Here are some fun calculators for things like relationship length or date calculations that you’ll love to share.
There are quite a few calculators and interactive tools here on DQYDJ. We’re nowhere near finished with this collection, though. Hopefully over time this page will become even more unwieldy: finance calculators for days!
Help us out by sending us your ideas. Either way, we hope you enjoyed the tools and calculators!