if you have calculation logic implemented as an excel worksheet that's good otherwise a well-described logic or example calculator can also be given as a reference before I implement it as a web app.

Health Calculators

Finance Calculators

Custom Calculators

Excel to a web conversion

WordPress calculator

Send the result to the user via E-mail

Graph Calculators

Print result or export result as CSV, PDF, etc

Database Integration

Duplicate online calculator

Graphics

I can build any type of Predefined and custom calculator

some predefined calculators are following.

Mortgage Calculator

ROI

Tax

Calorie Calculator

BMI

Weight Loss

Distance converter

Personal loan

Car loan

Auto Payment Calculator

Unlimited Revisions

work until you fully satisfied

Free small changes in future