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JASPER v2.0 - JavaScript Percentage Elemental Results Calculator
Click here for Instructions and examples.
Step 1: Input Nominal Molecular Formula
Formula: 
e.g. CH3C6H3ClCON(CH3)2 or C10H12ClNO

Nominal Composition  

Step 2: Input Observed Composition

Analyzed values (%)
C  
H  
N  
O  
Cl  
S  
Br  
F  
I  
P  
Elemental Ratios  
Step 3: Input Possible Contaminants/Solvents

First Solvent/Impurity

Formula 
min. mol  - max. mol  - step 
Second Solvent/Impurity

Formula 
min. mol  - max. mol  - step 
Third Solvent/Impurity

Formula 
min. mol  - max. mol  - step 
precision limit (absolute %) 

Step 4: Calculate For Possible Contaminants/Solvents
Idea and concept: Ulrich Jordis v 1.0 written by Michael Knapp v 2.0 written by Pierre G. Potvin