Company
About Do The Calculation
375+
calculator pages
Finance, business, health, math, utility, and planning tools.
100+
educational guides
Plain-language explainers tied to real calculator workflows.
Local
privacy model
Calculations run in the browser and saved items stay on-device.
Open
formula notes
Assumptions, methods, and limitations are made visible.
Why we exist
Calculators should explain the answer, not just return a number.
Most online calculators stop at the final output. We build pages that show the formula, the assumptions that matter, and what users should check before making a decision.
We started Do The Calculation to make everyday financial, business, health, math, and utility calculations easier to understand. The platform is built as a long-term public tool library: fast pages, simple controls, useful educational content, and reusable systems that scale as new calculators and templates are added.
Accurate by design
Every calculator uses explicit, documented formulas with readable assumptions and result breakdowns you can verify.
Practical first
Inputs, results, examples, and next steps are built for quick decisions, not abstract reference pages.
Privacy aware
Personal inputs are not sent to our servers. Saved calculations are stored locally in your browser.
Editorial methodology
A clear review path before a calculator goes live.
Every calculator and guide follows the same practical standard: source the method, test the result, then publish the context users need to interpret it.
Source the formula
We begin with recognized references such as IRS publications, WHO/CDC guidance, standard financial math, and domain-specific technical sources.
Test known outputs
Calculator logic is checked against known scenarios so formulas, units, rounding, and edge cases behave predictably before publishing.
Publish with context
Pages explain assumptions, limitations, formula logic, and professional-advice boundaries so users understand what the result means.
Trust & transparency
Operating standards users can hold us to.
The site is designed around useful tools, supporting content, and spreadsheet resources that connect back to real planning workflows.
Calculator assumptions stay visible and easy to review.
YMYL topics use plain language around estimates and professional-advice boundaries.
Formula sources are grounded in recognized public, academic, or industry references.
Pages are designed for speed, mobile use, readable contrast, and assistive technology.
Personal calculator inputs are not sold or shared.
Legal and policy pages stay readable, direct, and easy to find.
375+ calculator pages
Focused tools for mortgages, loans, investing, taxes, business margins, health estimates, dates, grades, units, and more - each with formula documentation and worked examples.
Templates and guides
Downloadable spreadsheet templates and educational articles help users move from a quick estimate to a more complete plan with deeper understanding.
Leadership
Founder & Co-Founder
Product direction, calculator architecture, spreadsheet modeling, and editorial standards are led by our founding team.
Sheharyar Shahid
Founder & Lead Developer
Data Analyst & Advanced Excel Specialist (DAE)
Founder of Do The Calculation. Sheharyar is a data analyst and product developer with extensive experience building advanced financial models, automated spreadsheet calculators, and interactive web tools. He founded Do The Calculation to translate complex spreadsheet modeling logic into fast, accessible, and privacy-first web calculators.
Kehkishan Shahid
Co-Founder & Senior Template Developer
Senior Data Analyst & Spreadsheet Architect (6+ years experience)
Co-Founder of Do The Calculation. Kehkishan specializes in building advanced spreadsheet architectures, automated Google Sheets models, and interactive dashboard templates, and helps guide the platform's spreadsheet product direction. She focuses on developing clean, validation-supported tools for business planning and financial tracking.
Subject matter experts
Editorial Review Board
Selected PhD researchers and professional domain experts review calculator models, guide content, and formulas across major categories.
Dr. Elizabeth Vance, PhD
Senior Editorial Board Member (Finance)
PhD in Quantitative Finance, London School of Economics
Former investment bank strategist and university lecturer with 15+ years of research in compound growth modeling, asset allocation, and annuity projections. Dr. Vance reviews all core investment and retirement tools to ensure absolute alignment with actuarial standards.
Dr. Marcus Sterling, PhD
Tax Policy & Economic Advisor
PhD in Public Economics, University of Chicago
Specialist in progressive taxation systems, corporate finance, and business depreciation cycles. Dr. Sterling ensures our tax, salary, depreciation, and corporate margin calculators match current IRS and global regulatory guidelines.
Dr. Sarah Jenkins, PhD
Health Science Specialist
PhD in Exercise Physiology & Metabolism, Stanford University
Researcher in human metabolic expenditure, energy expenditure forecasting, and body composition dynamics. Dr. Jenkins reviews our BMI, BMR, TDEE, and fitness calculators to ensure they apply correct, peer-reviewed clinical formulas.
Dr. Robert Chen, PhD
Nutritional Biochemistry Specialist
PhD in Nutritional Science, UC Berkeley
Academic researcher specializing in macronutrient partitioning, electrolyte balance, and metabolic hydration demands. Dr. Chen guides the mathematical models used for macro splits, protein targets, and daily water intake estimates.
Dr. Elena Rostova, PhD
Mathematics Advisor
PhD in Pure Mathematics, Sorbonne University
Professor of mathematics with 20+ years of teaching experience. Dr. Rostova oversees the formulas, proofs, and algorithms behind our math division tools, fractions, logarithms, and scientific equations.
Dr. Olivia Martinez, PhD
Environmental Sciences Consultant
PhD in Sustainable Engineering, KTH Royal Institute of Technology
Researcher in renewable energy integration and greenhouse gas accounting. Dr. Martinez validates EPA emission conversion factors and solar payback models used across all our eco calculators.
BI & automation engineers
Spreadsheet & Template Developers
Our template development team engineers Excel and Google Sheets planning tools with clean structure, validation, formulas, and dashboard-ready outputs.
Dur-e-Sameen Shahid
Senior Template Developer & BI Specialist
Senior BI Engineer & Excel Architect (6+ years experience)
Expert in financial forecasting templates, automated loan amortization models, and Power Query data transformation systems. Dur-e-Sameen specializes in engineering user-ready offline spreadsheet calculators.
Shahsawar Shahid
Senior Spreadsheet Architect & Data Analyst
Senior Financial Modeler & Excel Automator (6+ years experience)
Professional spreadsheet developer specializing in corporate finance templates, debt payoff calculators, and custom Excel macro automation. Shahsawar ensures offline models maintain absolute mathematical alignment with our web-based tools.
Shahzaib Shahid
Spreadsheet Developer & Data Analyst
Spreadsheet Developer & Excel Automation Specialist
Spreadsheet developer focused on building structured Excel and Google Sheets templates with clean formulas, data validation, and reliable automation. Shahzaib supports the template development team in engineering easy-to-use planning tools for everyday budgeting and business tracking.
Important context
Need a calculator improved or added?
Send a request with the calculator, formula, or workflow you want to see. Practical requests help shape the next pages we build.