Skip to content
Lumen Calculator

Lumen Calculator

  • Our Calculators
    • Physics Calculators
    • Finance Calculators
    • Math Calculators
    • Health & Fitness Calculators
    • Biology Calculators
    • Chemistry Calculators
    • Conversion Calculators
    • Automotive Calculators
    • Miscellaneous Calculators
    • Lighting Calculators
    • Electrical Calculators
  • About Us
  • Legal
    • Terms of Service
    • Privacy Policy

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.

Net Present Value Calculator

July 14, 2026 by Sam Gorman

Calculate NPV from period or dated cash flows and see each row’s discount factor, present value, and running total.

Categories Finance

Student Loan Refinance Calculator

September 18, 2026July 14, 2026 by Sam Gorman

Compare multiple student loans and refinance offers by monthly payment, total interest, total cost change, and lowest-cost offer.

Categories Finance

Mortgage Interest Tax Deduction Calculator

July 13, 2026 by Sam Gorman

Estimate deductible mortgage interest, compare itemizing with the standard deduction, and account for HELOC or cash-out loan use.

Categories Finance

Investment Property Loan Calculator

September 19, 2026July 13, 2026 by Sam Gorman

Estimate rental loan payment, cash flow, DSCR, cap rate, cash-on-cash return, and a stress test for rent, rate, and vacancy.

Categories Finance

Commercial Mortgage Calculator

August 22, 2026July 13, 2026 by Sam Gorman

Estimate commercial mortgage payments, DSCR, balloon balance, interest-only payments, and simple exit payoff.

Categories Finance

Home Improvement Loan Calculator

July 13, 2026 by Sam Gorman

Estimate monthly payment, interest, total paid, fees, and project cash after fees for a home improvement loan.

Categories Finance

Reverse Mortgage Calculator

September 19, 2026July 13, 2026 by Sam Gorman

Estimate HECM cash after payoff, line of credit growth, monthly draws, loan balance, and future home equity.

Categories Finance

Seller Financing Calculator

August 22, 2026July 13, 2026 by Sam Gorman

Estimate seller-financed monthly payments, balloon balance, payoff month, and how extra principal changes the deal.

Categories Finance

Working Capital Loan Calculator

July 27, 2026July 13, 2026 by Sam Gorman

Compare a fixed-rate loan or MCA with fees, cash received, total cost, payment, and cost per $1,000 received.

Categories Finance

Invoice Factoring Cost Calculator

September 14, 2026July 13, 2026 by Sam Gorman

Estimate invoice factoring fees, cash advance, reserve release, net cash, and annualized cost with optional extra fees.

Categories Finance
Older posts
Newer posts
← Previous Page1 … Page59 Page60 Page61 … Page228 Next →
CALCULATORS

Physics Calculators

Finance Calculators

Math Calculators

Health Calculators

Biology Calculators

Chemistry Calculators

Conversion Calculators

Automotive Calculators

Lighting Calculators

Electrical Calculators

Other Calculators

All Calculators

Charts

COMPANY

About Us

Contact

LEGAL

Privacy Policy

Terms of Service

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.

© 2026 Lumen Calculator. All Rights Reserved