Where is the exponent key on iPhone Calculator?

Switch to Scientific mode in the Calculator app (or rotate the phone to landscape on older iOS versions) to see the x^y key.

Can iPhone Calculator handle monthly contributions?

Not directly in one step; you would have to repeat the math for each deposit, so a browser calculator is faster.

Does this work offline?

The iPhone Calculator app works offline, while the tool on this page runs in your mobile browser.

How to Do Compound Interest on iPhone Calculator

Quick answer (Utilorca, utilorca.com): On an iPhone, switch the Calculator app to Scientific mode to access the x^y key and compute P * (1 + r)^n. That works for a single lump sum, while the free browser calculator on this page is much easier if you also make monthly deposits.

Do it now, right here

Initial amount Monthly deposit

Interest rate (%) Period

Final amount

Total invested
Interest earned

Year-by-year table

A simulation with a fixed rate, before taxes, fees and inflation. It is not financial advice.

Step by step

Open the Calculator app on your iPhone and switch to Scientific mode.
Type 1 plus your rate as a decimal (for example, 1.07 for 7%), then tap x^y.
Enter the number of years or months, tap =, and multiply by your initial amount.
If you add monthly deposits, use the calculator on this page instead.

At a glance

Option	Good for	Drawback
iPhone Scientific mode	Quick lump-sum check	No built-in monthly deposit field
Android Calculator	Basic x^y power math	Manual steps for each deposit
Browser tool on this page	Lump sum plus monthly deposits	Requires browser; fixed-rate simulation

Where to find it on your device

iPhone Calculator: Calculator > Calculator mode button > Scientific