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The Laboratory Calculator is an utility to calculate various parameter:

- Mole Related Calculations:

Calculation of molarities
Conversion between gram and mole
Determination of dilutions from stock solutions
Conversion between ppm and molarity
Calculation of dilutions (c1v1=c2v2)
Conversions between amounts and masses or combinations thereof

- Molecular Weight Calculations

Molecular weight calculator for chemical formulas including support for stable isotopes

- pH Calculations:

Calculation of pH's of acids or bases
Calculation of pH's of solutions of acids and bases
Titration Curves

- Centrifugation Related Calculations

Calculation of g-force, RPM and rotor diameter

What’s New

Version 4.5.4

Minor Bug Fix

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

loosebutthole ,

Used this app everyday for years

I can’t say enough good about this app. Fantastic for quickly preparing buffers and dilutions. Saves tons of messy calculator work.

Nygreenguy ,


Awesome lab app for the student or professional!

Sheep071 ,

Comment to jeffspc88

As the developer I am sorry that you had such a bad experience. The problem with mole converter was caused by a wrong variable which was set when you did exit the program. The next time you did start the program kDa instead of Da was displayed (or vice versa). Therefore you get mmoles instead of moles. You can test it by yourself by shaking your device to clear all fields. When you now enter the values the correct solution will be displayed. I have submitted an update (1.8.1) to fix this problem. The update will also address the slider issue. In cases when the value was zero it was not possible to change the unit.
However thank you for your valuable feedback and I hope you give the program a second chance.


Harald Tammen
9.3 MB

Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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