Free Calculators: Value Investing, Money & Health

Every calculator runs in your own browser: nothing you type is sent anywhere, there is nothing to sign up for, and each page explains its formula so you can check it. They work with any currency.

Value

Value investing

What is a business worth, and how much room for error does the price leave?

Graham Number Calculator Estimate intrinsic value using Benjamin Graham's classic value investing formula. Kept in The BinnacleOpen calculator → DCF Calculator Estimate intrinsic value by discounting projected future cash flows back to today. Kept in The BinnacleOpen calculator → P/E & P/B Ratio Calculator The two most commonly cited value investing screens, calculated together. Kept in The BinnacleOpen calculator → Margin of Safety Calculator The single most important rule in value investing: never pay full price for fair value. Kept in The HelmOpen calculator → Buffett Indicator Calculator Warren Buffett's favorite gauge of whether the entire stock market is cheap or expensive. Kept in The HelmOpen calculator →

Finance

Money and time

Interest, dividends, loans and the long patience of saving.

Compound Interest Calculator See how your money grows over time with the power of compounding. Kept in The Chart RoomOpen calculator → Rule of 72 Calculator The fastest mental-math trick in investing: how long until your money doubles? Kept in The Chart RoomOpen calculator → Dividend Calculator How much income do your shares pay, and how fast does it grow if you reinvest? Kept in The HoldOpen calculator → Retirement Savings Calculator Find out exactly how much you need to save each month to retire on your terms. Kept in The HoldOpen calculator → Mortgage Calculator Calculate your monthly mortgage repayment and see the full cost of your home loan. Kept in The Harbour OfficeOpen calculator → Loan Repayment Calculator Work out your monthly payment for any loan, and see how extra payments save you time and money. Kept in The Harbour OfficeOpen calculator → Percentage Calculator Solve any percentage problem in seconds — what percent, increase/decrease, or add/subtract a percentage. Kept in The Harbour OfficeOpen calculator →

Health

Estimates for the body: energy, water, weight, sleep and the heart.

Calorie Counter Find out how many calories you need each day to maintain, lose, or gain weight. Kept in The GalleyOpen calculator → Water Intake Calculator Find your recommended daily water intake based on your weight and activity level. Kept in The GalleyOpen calculator → BMI Calculator Calculate your Body Mass Index and find your healthy weight range instantly. Kept in The GalleyOpen calculator → Body Fat Calculator Estimate your body fat percentage using the U.S. Navy tape-measurement method. Kept in The GalleyOpen calculator → Sleep Cycle Calculator Wake up at the right moment in your sleep cycle — and start every day feeling refreshed. Kept in Tom's CabinOpen calculator → Heart Rate Zone Calculator Find your five training zones for running, cycling, walking and other endurance exercise. Kept in Tom's CabinOpen calculator → Age Calculator Find your exact age in years, months and days — or the time between any two dates. Kept in The Ship's BellOpen calculator → Due Date Calculator Estimate your baby's due date and see how far along your pregnancy is. Open calculator →

Measure

Length, weight and temperature between systems.

Unit Converter Convert length, weight, volume, temperature, area and speed between metric, imperial and US units. Kept in The Bosun's LockerOpen calculator →

Aboard the Anima

The same instruments, room by room

Most of these calculators are also kept in a room of the Anima, the ship from the book, each beside an instrument of its own.

See the ship's plan Read the log

By the same hand

Anima
The Most Important Investment

The instruments can do the arithmetic. They cannot tell you what is worth holding. That question is the voyage, and the book is where it is asked.

Paperback Kindle

These are instruments, not advice. Numbers chart a course; they do not sail it for you. All calculators give estimates for education only. Check important decisions with a qualified professional.