The Common Sense Calculator | TheMoneyBooks

Common Sense

Calculatorâ„¢

Put in your own numbers.
Watch what your money actually does.

Four calculators in one. Solve for the figure you're missing, see how long your money takes to double, watch taxes and inflation take their cut, and see how many years your money has to last.

The math never lies. Now watch it work on your numbers.

Financial

Rule of 72

Wealth Formula

Longevity

Run your numbers

Four calculators, one keypad

Every mode keeps its own numbers, so you can move between them without starting over.

1

Financial

Savings goal, loan payoff or income goal. Fill four boxes and solve for the fifth.

2

Rule of 72

Divide 72 by your rate. That's how many years your money takes to double, and double again.

3

Wealth Formula

Money, plus time, plus rate of return, less taxes and inflation. Watch the two silent partners take their cut.

4

Longevity

Healthy years, supported years, and the number of years the money has to last.

1

Type a number

Enter the figure on the keypad, the way you would on any calculator.

2

Tap where it belongs

YRS, RATE, PV, PMT or FV. Fill any four of the five boxes.

3

Press SOLVE

Press SOLVE, then tap the box you left empty. The graph, the story, and the share buttons appear.

YRS

30

Years

Rate

8%

% per year

PV

$0

Start

PMT

$300

Add per month

FV

?

Goal

Solve

Tap the empty box

Fill four, solve the fifth. Thirty years at a hypothetical 8% on $300 a month lands at $447,108.

Take the guide with you

Six pages of worked examples: what you press, what the screen shows, and what just happened.

Cover of Run Your Own Numbers, a guide to TheMoneyBooks Common Sense Calculator

Run Your Own Numbers

A guide to TheMoneyBooks Common Sense Calculatorâ„¢. Every figure in it came out of the same four calculators on this page, so you can reproduce all of them yourself.

Download the Guide

Want help reading your own numbers?

Your financial educator can walk through the same screens with you and talk through what they mean for you.