GF Labs

Financial Tools That Actually Work

by Shafen Khan

Available Calculators

Built for real-world use. Clean, fast, accurate.

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OB Billing Calculator

Calculate exact billing amounts for prenatal and delivery services. Handles copays, deductibles, and global periods. Built for Legacy OBGYN and now used by multiple practices.

Live
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Compound Interest

Visualize the power of compound growth. Calculate future values with monthly contributions, various compounding frequencies, and beautiful charts showing your wealth trajectory.

Live
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Real Estate ROI

Analyze rental properties and flips. Calculate cap rates, cash-on-cash returns, and total ROI. Includes financing options, expense tracking, and market comparison tools.

Beta
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Tax Estimator

Quick tax liability estimates for W2 and 1099 income. Handles standard and itemized deductions, state taxes, and quarterly payment calculations. Powered by TaxSq integration.

Coming Soon
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Loan Comparison

Compare multiple loan offers side-by-side. Total interest paid, monthly payments, and amortization schedules. Perfect for mortgage shopping or refinance decisions.

Coming Soon
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Practice Metrics

Healthcare practice KPI dashboard. Track patient volume, revenue per visit, collection rates, and provider productivity. Export-ready reports for stakeholders.

Coming Soon

Why GF Labs?

Tools designed by someone who actually uses them

Lightning Fast

No page reloads. Instant calculations. Results update as you type.

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Accuracy First

Tested against real-world scenarios. Used in production by actual businesses.

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Works Everywhere

Desktop, tablet, phone. Progressive web apps that work offline too.

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Print Ready

Clean print layouts for client presentations and documentation.

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Privacy First

All calculations happen in your browser. No data sent to servers.

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Always Free

No signups, no trials, no catches. Just tools that work.

Need a Custom Calculator?

I build tools for specific business needs

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