About Calcufast
We are the expert team behind Central America's most trusted calculator platform, dedicated to democratizing access to accurate financial and health tools.
Our Mission
At Calcufast, we believe that everyone in Central America deserves free access to reliable financial and health tools. Our commitment is to provide accurate, updated, and easy-to-use calculators that empower people to make informed decisions about their money and health.
From Guatemalan taxes to BMI calculators, every tool is backed by local expertise and verified official sources.
Instant Results
Calculations are processed in real time in your browser. No waiting, no submit buttons.
Verified Formulas
We use industry-standard formulas, verified by professionals in each field.
Multilingual
Available in English, Spanish, and Portuguese to serve a global community.
100% Private
All calculations run locally on your device. We never store or send your data.
Our Expert Team
Certified professionals from across Central America with decades of combined experience in finance, technology, and health.
8+ years in web development and fintech
12+ years in preventive medicine
15+ years in auditing and taxation
10+ years in financial planning
Our Methodology
Every calculator goes through a rigorous verification process to ensure accuracy and reliability.
We review official government and academic sources
Certified experts verify each formula
We test with real cases before publishing
We monitor legal changes and update regularly
Certifications and Validations
Official Sources and Verification
Government Institutions
- SAT Guatemala - Superintendencia de Administración Tributaria
- Banco de Guatemala (Banguat)
- IGSS - Instituto Guatemalteco de Seguridad Social
- Ministerio de Salud Pública - Guatemala
- CCSS - Caja Costarricense de Seguro Social
- Ministerio de Hacienda - Costa Rica
Professional Organizations
- Guatemala CPA Association
- Guatemala Banking Association (ABG)
- Guatemala Medical Association
- World Health Organization (WHO)
- Pan American Health Organization
- American Heart Association
What Our Users Say
"The ISR calculators are exact and save me hours of work. I use them daily for my clients."
María G.
Accountant, Guatemala
"I recommend the health calculators to my patients. They are reliable and easy to understand."
Dr. Carlos M.
Doctor, Costa Rica
"Perfect for planning my business finances. The loan calculations are very useful."
Ana L.
Entrepreneur, Honduras
Our Commitment to Quality
Continuous Updates
We monitor legal changes and update our formulas regularly
Guaranteed Accuracy
Every calculation is verified by experts before publication
Constant Innovation
We develop new tools based on user needs
Contact Us
If you have questions, suggestions, or detect any errors in our calculators, don't hesitate to contact us. Your feedback helps us improve continuously.