About Calcufast
Calcufast is a free platform of financial and health calculators for Central America, built to democratize access to accurate, easy-to-use 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.
Who's behind Calcufast
Calcufast is an independent project designed, built, and maintained by a single developer.
8+ years in web development and fintech
Our Methodology
Every calculator goes through a rigorous verification process to ensure accuracy and reliability.
We review official government and academic sources
Each formula is checked against current regulations
We test with real cases before publishing
We monitor legal changes and update regularly
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
Our Commitment to Quality
Continuous Updates
We monitor legal changes and update our formulas regularly
Verifiable accuracy
Every calculation shows its formula and sources so you can verify it
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.