About the Author

Editorial Team

IstantCalc calculators are developed by a team of professionals with expertise in:

  • Home Improvement: 15+ years experience in construction, renovation, and DIY projects. Content reviewed by licensed contractors and building professionals.
  • Health & Fitness: Content developed with input from certified personal trainers (CPT), registered dietitians (RD), and exercise physiologists. All health calculators follow evidence-based guidelines from NIH, CDC, and American Heart Association.
  • Energy Calculations: Reviewed by electrical engineers and energy efficiency consultants. Calculations based on EPA and Department of Energy standards.

Our Commitment to Accuracy

Every calculator on IstantCalc is:

  • ✓ Based on industry standards and scientific research
  • ✓ Regularly updated with current data and formulas
  • ✓ Reviewed by subject matter experts
  • ✓ Tested for accuracy and usability
  • ✓ Supported by authoritative sources and references

Health & Medical Disclaimer

Health and fitness calculators on this site are for educational and informational purposes only. They should not replace professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider, registered dietitian, or physician before making significant changes to your diet, exercise regimen, or health routine. Individual results may vary based on personal circumstances, medical conditions, and medications.

Sources & Standards

Our calculators reference standards from:

  • Health: National Institutes of Health (NIH), Centers for Disease Control (CDC), World Health Organization (WHO), American Heart Association
  • Construction: American National Standards Institute (ANSI), ASTM International, International Building Code (IBC)
  • Tile & Grout: Tile Council of North America (TCNA), National Tile Contractors Association (NTCA)
  • Paint & Coatings: Paint Quality Institute, EPA VOC Standards, ASTM D1640

Last Updated: January 10, 2025
Contact: For questions about our methodology or to report errors, please visit our contact page.