About How to Calculate: Our Story

🎯 The Problem That Started It All

In 2019, I was helping my sister plan her first home purchase. She was overwhelmed by mortgage calculators that gave different results, and I was frustrated by financial tools that seemed designed to confuse rather than clarify. That's when I realized something: people don't just need calculations—they need trustworthy, accurate tools that help them make confident decisions.

What started as a simple mortgage calculator has grown into a comprehensive suite of 120+ calculators, each built with the same principle: accuracy first, simplicity always. Today, we help over 50,000 users monthly make informed decisions about their finances, health, and daily calculations.

Our Mission: Empowering Decisions Through Accurate Calculations

We believe that everyone deserves access to accurate, easy-to-use calculation tools. In today's fast-paced world, quick access to reliable calculations can make the difference between informed decisions and guesswork. Our mission is to provide a comprehensive suite of calculators that cover the most common calculation needs people face in their daily lives.

👨‍⚕️ Meet Our Expert Team

Dr. Michael Chen, MD

Lead Medical Advisor & Health Calculator Expert

  • • 15+ years medical practice experience
  • • Board-certified in Internal Medicine
  • • Specializes in preventive health and nutrition
  • • Reviews all health-related calculators

Prof. David Rodriguez, PhD

Mathematics & Engineering Calculator Specialist

  • • PhD in Applied Mathematics
  • • 20+ years teaching experience
  • • Published 50+ research papers
  • • Ensures mathematical accuracy

Sarah Johnson, CFP®

Financial Planning & Money Calculator Expert

  • • Certified Financial Planner
  • • 15+ years financial planning experience
  • • Former mortgage broker
  • • Reviews all financial calculators

Dr. Lisa Park, PhD

Science & Engineering Calculator Specialist

  • • Mechanical Engineering Professor
  • • 15+ years teaching experience
  • • Published 50+ research papers
  • • Industry consultant

Prof. James Wilson, PhD

Time & Date Calculator Specialist

  • • Computer Science Professor
  • • 20+ years software development
  • • Time systems specialist
  • • Scheduling algorithms expert

Mike Chen, PE

Conversion & Measurement Specialist

  • • Civil Engineer
  • • 12+ years engineering experience
  • • Certified measurement professional
  • • International standards expert

Dr. Emma Thompson, EdD

Education Calculator Specialist

  • • Educational Psychology Professor
  • • 18+ years teaching experience
  • • Published 30+ education papers
  • • Learning assessment expert

Robert Martinez, Master Craftsman

Home & DIY Calculator Specialist

  • • Licensed Contractor
  • • 25+ years construction experience
  • • Certified master craftsman
  • • DIY project planning expert

Alex Kim, CISSP

Technology & IT Calculator Specialist

  • • Cybersecurity Specialist
  • • 15+ years IT experience
  • • Infrastructure expert
  • • Network calculations specialist

Jennifer Adams, MS

Lifestyle & Everyday Calculator Specialist

  • • Human Factors Specialist
  • • 10+ years research experience
  • • Lifestyle consultant
  • • Habit tracking expert

David Lee, MBA

Business Analytics & General Calculator Specialist

  • • Business Analytics Expert
  • • 12+ years consulting experience
  • • Data analysis specialist
  • • MBA from top university

Our Commitment

Every calculator is reviewed by our expert team to ensure accuracy, reliability, and educational value.

  • • Expert-reviewed accuracy
  • • Real-world applications
  • • Educational value
  • • Professional standards

What We Offer: Comprehensive Calculation Solutions

đź’° Financial Calculators

From mortgage and loan calculators to investment and retirement planning tools, we help you make informed financial decisions with confidence.

Expert-reviewed by: Certified Financial Planners

🏥 Health & Fitness

Track your health metrics with BMI, BMR, calorie, and body fat calculators designed to support your wellness journey.

Expert-reviewed by: Board-certified physicians

đź§® Mathematical Tools

Solve complex mathematical problems with our scientific calculator, fraction calculator, and statistical analysis tools.

Expert-reviewed by: PhD mathematicians

🔄 Conversion Tools

Convert between different units of measurement for temperature, length, weight, and cooking measurements with precision.

Expert-reviewed by: Engineering professionals

📊 Our Impact: Real Numbers, Real Results

50,000+
Monthly Active Users
120+
Expert-Reviewed Calculators
99.9%
Accuracy Rate

Why Choose How to Calculate?

âś… Expert-Reviewed Accuracy

Every calculator is reviewed by industry experts—physicians, mathematicians, and financial professionals—to ensure you get reliable results you can trust.

🎯 Real-World Applications

Our calculators aren't just mathematical tools—they're built for real-life scenarios with practical examples and expert insights.

đź”’ Privacy-First Design

Your data stays on your device. We don't track or store your personal information—your privacy is our priority.

📚 Educational Value

Each calculator includes explanations, formulas, and expert insights to help you understand the math behind the results.

đź’¬ What Our Users Say

"The mortgage calculator helped me understand exactly what I could afford. The expert insights made all the difference in my homebuying decision."

- Sarah M., First-time Homebuyer

"As a fitness trainer, I recommend these health calculators to all my clients. The accuracy and expert advice are unmatched."

- Mike Chen, Certified Personal Trainer

Our Commitment to Quality

We understand that when you're making important decisions about your finances, health, or academic work, accuracy is paramount. That's why we maintain rigorous standards for all our calculators. Each tool undergoes multiple rounds of testing and validation before being made available to users. We regularly review and update our calculators to ensure they remain accurate and relevant.

Get in Touch

We value feedback from our users and are always looking to improve our calculators. If you have suggestions for new calculators, improvements to existing ones, or just want to share your experience, we'd love to hear from you. Your input helps us create better tools for everyone.

Ready to Start Calculating?

Explore our collection of calculators and discover how easy it can be to get accurate answers to your calculation needs. Whether you're a student, professional, or just someone who needs quick calculations, we have the tools to help you succeed.

Browse All Calculators