The everything calculator.

Download hundreds of calculations or create your own with PowerOne® calculator.

PowerOne templates
PowerOne Template
Quick and accurate. Templates act similar to locked-down mini-spreadsheets that increase accuracy and speed for repetitive calculations. Enter the data you know. PowerOne will calculate the rest.
PowerOne Calculator
For those one-off calculation needs, PowerOne provides a powerful standard and RPN calculator on iOS devices. Over a hundred functions to help with virtually anything: basic math, powers, logs, trigonometry, probability, programmer’s math, fractions, and Imperial and metric units.
PowerOne Library
Get up and running fast with hundreds of pre-created templates in PowerOne's extensive library. Covers everything: finance, conversions, real estate, business, investing, construction, engineering, health, fitness, and more.
Create PowerOne Templates
While some calculations are common, there are millions more specific to you or your business. With PowerOne, it is easy to create powerful templates of your own using our intuitive language. You, your team, and your customers can perform their own calculations without ever having to think about the math.
Access PowerOne everywhere. Whether on the go with your iPhone or iPad or at your desk on the web, PowerOne makes sure your critical calculations are available at your fingertips offline or on.
Keep everyone on the same page. Share your results and templates with your team and customers. Ensure everyone is performing the same error-free calculations every single time.
Dark Theme
Highly customizable. Go beyond templates with expanded calculator functions and themes! Match your mood and make it the product you want to use every day.

What others are saying

Multiple time Apple staff pick + Best of 2010


"You need this calculator. It's miles better than the competition."

Robert Burns

"The crème de la crème of calculators"


"Incredibly powerful tool for calculations of all kinds."

Smokin' Apps

"[PowerOne] sets the benchmark for other calculators to reach."

Fred Swan

"A legend. The best … calculator app I have ever seen."

Worldwide Tech

"We're hard pressed to name something PowerOne can't do."

"Not sure how I could do my job without PowerOne."

Arvid Martin

"… PowerOne shines."

Mac Observer