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Sam Gorman

Sam Gorman is a developer and data specialist with over 5 years of experience building statistical models. He has been featured in Google's #WeArePlay Campaign and Ticker News for his work at PregnancyChanceCalculator.com.

Credit Card Rewards Calculator

July 4, 2026 by Sam Gorman

Estimate credit card rewards after fees, perks, category rates, point value, and a welcome bonus spending check.

Categories Finance

Credit Card Cash Advance Calculator

August 22, 2026July 4, 2026 by Sam Gorman

Estimate cash advance fees, daily interest, total repayment, and the cost change from paying 7 days sooner or later.

Categories Finance

Credit Card Grace Period Calculator

July 4, 2026 by Sam Gorman

Calculate usable interest-free days, pay-by date, safer pay date, and grace-period status for a credit card purchase.

Categories Finance

Credit Card Average Daily Balance Calculator

July 4, 2026 by Sam Gorman

Calculate average daily balance, estimated credit card interest, daily rate, and balance stretches from posted transactions.

Categories Finance

Front-End Debt-to-Income Calculator

July 4, 2026 by Sam Gorman

Calculate front-end DTI from income and housing costs, plus monthly room left under your target.

Categories Finance

Housing Expense Ratio Calculator

September 19, 2026July 4, 2026 by Sam Gorman

Calculate your housing expense ratio, compare it with a target percent, and see monthly room or shortfall.

Categories Finance

Mortgage Payment Increase Calculator

July 4, 2026 by Sam Gorman

See how adding extra principal each month can change mortgage payoff time, interest saved, and your first higher payment.

Categories Finance

Mortgage Payment Breakdown Calculator

August 22, 2026July 3, 2026 by Sam Gorman

Estimate a mortgage payment split into loan, tax, insurance, PMI, HOA, extra principal, plus when PMI may stop.

Categories Finance

HELOC vs Cash-Out Refinance Calculator

July 3, 2026 by Sam Gorman

Compare a HELOC with a cash-out refinance by cost, monthly payment, remaining debt, and LTV over your chosen time period.

Categories Finance

HELOC Draw Period Calculator

September 19, 2026July 3, 2026 by Sam Gorman

Estimate draw-period payments, end balance, repayment payment, payment change, and interest for an existing HELOC.

Categories Finance
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Advertiser disclosure: LumenCalculator.com is an independent, advertising-supported calculator site. Display ads may be served by partners such as Google. We may earn revenue from ads. Advertising does not influence calculator outputs.

About these calculators: Tools provide educational estimates based on formulas and common assumptions. Results are illustrative and may not match real-world components, tolerances, and environmental conditions. Verify against datasheets, standards, and professional guidance where relevant.

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