About Calculator Academy
Free calculators built to solve real-world problems.
Calculator Academy creates easy-to-use calculators, converters, and educational tools for people who need quick, practical answers. Calculator Academy is owned and operated by Calculator Academy LLC and was founded by Patrick Myers. Our goal is to make formulas, estimates, and everyday calculations easier to understand, whether you are working through a school problem, planning a project, comparing finances, or checking a health and fitness estimate.
What We Do
Calculator Academy specializes in more than 7,000 free online calculators that help users turn formulas into clear answers. Instead of making users hunt through equations or manually convert units, our tools are designed to give direct results, explain the inputs, and make the calculation process easier to follow.
The site covers a wide range of calculator categories, including math, finance, physics, engineering, construction, health, fitness, statistics, everyday life, and unit conversions. Because calculators can be used for important decisions, we aim to make each tool understandable, transparent, and easy to correct when a better formula or explanation is needed.
How We Build and Review Calculators
Our process for new and materially updated calculators is focused on making each tool useful, accurate, and easy to understand. Each calculator starts with the user’s problem, then works backward into the formula, required inputs, assumptions, and final result format.
1. Research the calculation
We identify the formula, conversion, or estimation method that best matches the user’s intent. When there are multiple possible methods, we try to make the assumptions clear.
2. Build the calculator
We design the tool so users can enter values quickly, choose relevant units, and get a result without unnecessary friction.
3. Test the output
We check calculator behavior, result formatting, edge cases, and common example values to reduce errors and improve usability.
4. Review and publish
Beginning in August 2026, new and materially updated calculators are manually reviewed for formula implementation, assumptions, inputs, result formatting, and clarity before publication. We also welcome corrections from users.
Independent References and Coverage
Independent media, government reports, scholarly articles, and conference papers have referenced Calculator Academy or used one of its calculators. Each link below goes to the specific source.
MKFM · June and July 2026
Pet Paw Safety Calculator coverage
MKFM covered Calculator Academy’s Pet Paw Safety Calculator in two heat-safety articles. The July article identifies Patrick Myers as a Calculator Academy spokesperson.
Federal Aviation Administration · May 16, 2024
Hydaburg Seaplane Facility Final Environmental Assessment
The final environmental assessment used Calculator Academy’s Boat Fuel Consumption Calculator in its barge-fuel and greenhouse-gas analysis on printed pages 23 and 37.
The New Zealand Initiative · October 2025
MMP After 30 Years: Time for Electoral Reform?
Nick Clark’s policy report used Calculator Academy’s Gallagher Index Calculator to produce its Table 2 election-comparison values. The report discloses that ChatGPT was used to enter the election results.
Kansas Journal of Law & Public Policy · Spring 2025
Transgender Students, Fairness, and the Protection of Female School Sports
Rosalind S. Simson’s article cites Calculator Academy’s APE Index (Wingspan to Height Ratio) Calculator in footnote 120 on printed page 145.
ACM ICPE · May 5, 2025
Beyond Maximum Throughput: Explore Full Operational Envelope for Capacity Planning
Calculator Academy’s Queuing Theory Calculator appears as reference 6 in Xiaosong Lou’s ACM/SPEC International Conference on Performance Engineering proceedings article.
SpaceOps 2025 · May 2025
Designing a Humidity Control System for the OASYS Lunar Greenhouse
The SpaceOps conference paper cites Calculator Academy’s Psychrometric Constant Calculator as reference 16 for the psychrometric-constant entry in Appendix A. This records the citation and does not independently validate the paper’s value or units.
Frontiers in Research Metrics and Analytics · March 29, 2022
The Upsurge of Impact Factors in Pediatric Journals Post COVID-19 Outbreak
The peer-reviewed cross-sectional study cites Calculator Academy’s Impact Factor Calculator when defining the journal impact-factor ratio.
Biotechnology Letters · August 20, 2024
Completely Noninvasive Multi-Analyte Monitoring System for Cell Culture Processes
The research paper cites Calculator Academy’s Diffusion Time Calculator alongside its equation for estimating diffusion time through membranes.
BMC Public Health · December 9, 2025
Food Allergy Knowledge and Attitudes Among University Students in Palestine
The study cites Calculator Academy’s Cochran’s Sample Size Calculator for the standard formula used in its sample-size calculation.
Discover Cities · March 5, 2026
Spatio-Temporal Analysis of Urban Growth Pattern and Land Use Compliance in Ijebu Ode, Nigeria
The study says its population estimates were confirmed with Calculator Academy’s Population Growth Calculator.
Urban Science · April 6, 2026
Assessing Public Perceptions and Technical Potential of Waste-to-Energy in Kuwait’s Residential Sector
The study used a formula from Calculator Academy’s Waste to Energy Calculator in its technical-potential calculations.
Animals · May 20, 2025
Differences in Larval Microhabitat Between Two Cryptic, Sympatric Salamander Species
The study reports using Calculator Academy’s Similarity Index Calculator to generate its Jaccard Index.
International Journal of Information Technology and Computer Science · December 8, 2023
Accident Response Time Enhancement Using Drones
The case study cites Calculator Academy’s Improvement Percentage Calculator for the percentage-improvement formula used in its process analysis.
ŻYWNOŚĆ. Nauka. Technologia. Jakość · 2024
Optimization of Biosynthesis Conditions of Selected Carotenoids by Rhodotorula Yeasts
The food-science article cites Calculator Academy’s Extinction Coefficient Calculator in its methods for determining total carotenoid concentration.
A citation, reference, or use is documented here for transparency and does not imply endorsement, partnership, or approval by the author, publisher, journal, conference, or institution.
Meet Our Team
Calculator Academy was founded and is led by Patrick Myers, who serves as CEO and the primary author and developer of its calculator library. Julie Sheehan and Scott Hickam contribute subject-matter review in health and fitness and finance, respectively. The profiles below provide more detail about each person’s background and areas of expertise.
Patrick Myers
Founder and CEO
Expertise: B.S. Mechanical Engineering
Patrick began the calculator project in July 2017 and moved it to calculator.academy in 2018. As founder and CEO, he is the primary author and developer of its library of more than 7,000 calculators. His work focuses on calculator design, software development, formula implementation, and improving how users interact with online calculators.
Julie Sheehan
Technical Reviewer, Health and Fitness
Expertise: Master of Science in Applied Behavior Analysis
Julie has 10 years of experience in the healthcare field and reviews health and fitness calculators for clarity, practical usefulness, and responsible presentation of health-related estimates.
Scott Hickam
Technical Reviewer, Finance
Expertise: MBA, B.S. Finance
Scott has 8+ years of experience in the financial sector as a Senior Financial Analyst. He reviews finance-related calculators with a focus on practical assumptions, financial terminology, and result interpretation.
Official profiles
Calculator Academy and Patrick Myers
This directory separates company profiles from founder profiles and is intentionally limited to profiles currently confirmed for public use.
Calculator Academy
Company profiles
Patrick Myers
Founder & CEO profiles
Our Accuracy Standard
We strive to make every calculator accurate, useful, and easy to understand. However, calculators are only as accurate as the formulas, assumptions, and input values used. Some calculators provide exact mathematical results, while others provide estimates based on common formulas or simplified models.
If you notice a calculator that appears incorrect, unclear, outdated, or missing an important assumption, please contact us. We use reader feedback to improve formulas, examples, explanations, and calculator behavior across the site.
Disclaimer: All calculators on Calculator Academy are provided for educational and informational purposes only. We work to make our calculators as accurate as possible, but mistakes can happen. Health and fitness calculators are not intended to provide medical advice, diagnosis, or treatment. Finance calculators are not financial advice. For medical, legal, financial, or other professional decisions, consult a qualified professional.
Contact Calculator Academy
Questions, corrections, calculator suggestions, and feedback are welcome. If you find an issue with a calculator, please include the calculator URL, the inputs you used, and the result you expected.
Email: [email protected]
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