Calc ProScientific Constants for iPhone, iPad, Mac & Android
Nearly 2,000 constants at your fingertips, across mathematics, physics, the solar system, the elements, chemistry, biology, engineering, computer science and earth science. Look one up, then drop it straight into your calculation.
Take it with you
Free with ads · In-app purchase unlocks the full Pro Premium version
Constants Features
Features marked Pro Premium unlock with the Pro Premium in-app purchase in the app. Every feature is free to use in your browser.
Mathematics and physics
π, e, the speed of light, Planck's constant and hundreds more, at full precision with units.
The elements
Browse the elements for atomic numbers, melting and boiling points, density and more.
The solar system
Data for the Sun, the planets and their moons, such as diameters, distances and orbital periods.
Five specialist categoriesPro Premium
Chemistry, biology, engineering, computer science and earth science, from the molecular weight of glucose to the depth of the Mariana Trench.
Use in calculations
Insert any constant into your calculation with a single tap.
Recently used
The constants you use most stay one tap away.
Great for
- Physics and chemistry homework
- Engineering calculations
- Astronomy
- Teaching and reference
Frequently Asked Questions
What constants does Calc Pro include?
Nearly 2,000 constants. Mathematics, physics, the solar system and the elements are included free; chemistry, biology, engineering, computer science and earth science unlock with Pro Premium.
Can I use a constant in a calculation?
Yes. Pick a constant and insert it straight into your calculation at full precision.
Is Calc Pro free?
Calc Pro is a free download for iPhone and iPad on the App Store and for Android on Google Play and the Galaxy Store, supported by ads. The Pro Premium in-app purchase unlocks the full version, including crypto rates, PDF export, and the newest financial worksheets, unit categories, constants and statistics tools. The Mac app has no ads: it starts with a free 7-day trial of everything, then needs Pro Premium.
Is Calc Pro available on Android?
Yes. Calc Pro is available on Google Play for Android phones and tablets, and on the Galaxy Store for Samsung Galaxy devices.
Is Calc Pro available on Mac?
Yes. Calc Pro for Mac is on the Mac App Store. It has no ads and starts with a free 7-day trial of every feature. After that, Pro Premium unlocks it. It's the same one-time purchase as on iPhone and iPad, so if you've already bought Pro Premium there, restore it on your Mac at no extra cost.
More in Calc Pro
Download Calc Pro
Calc Pro combines 10 powerful calculators with 23 financial worksheets. It's the trusted choice of students, professionals, and investors worldwide, and the only app that can truly replace your pocket calculator. Now with support for iPhone Duo.
Free with ads · In-app purchase unlocks the full Pro Premium version
Or use the Constants free in your browser