MJK Tools Blog

Actionable guides to help you apply calculator outputs to real financial decisions with clear steps, worked examples, and links to the right tools.

May 30, 2026

SEO Keyword ROI Calculator: How to Estimate Keyword Profit

Learn how to calculate SEO keyword ROI from search volume, CTR, conversion rate, AOV or CLV, and monthly SEO costs before investing in content.

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May 3, 2026

How Much House Can I Afford? (2026 Complete Guide)

Find out exactly how much house you can afford based on your income, debt, and down payment. Use our free calculator and follow the proven rules lenders use.

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February 20, 2026

How to Pay Off Your Mortgage in 10 Years (Real Numbers + Calculator)

See how to pay off a 30-year or 15-year mortgage in 10 years with real extra-payment examples, loan-size tables, and a free payoff calculator.

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February 22, 2026

Compound Interest Explained: How $500/Month Becomes $1 Million

Understand the mechanics of compounding and see how regular monthly investing can grow into seven figures over time.

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February 24, 2026

The 50/30/20 Budget Rule: A Complete Guide for 2026

Use the 50/30/20 framework to create a realistic monthly budget and adapt it to real-world expenses.

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February 26, 2026

How Much Should You Have in an Emergency Fund?

A practical method to size, build, and maintain an emergency fund based on your essential monthly expenses and risk profile.

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February 28, 2026

ROI vs. Profit Margin: Which Metric Actually Matters?

Understand the difference between ROI and profit margin, when to use each, and how to combine both for better decisions.

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July 1, 2026

How to Calculate Zakat: A Complete 2026 Guide

Learn how to calculate Zakat step by step — what counts as zakatable wealth, how to find the Nisab threshold, and how to apply the 2.5% rate correctly.

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July 1, 2026

Zakat on Gold and Silver: Nisab, Jewelry, and How Much You Owe

A focused guide to calculating Zakat on gold and silver — Nisab weights for each metal, how jewelry is treated, and worked examples at different prices.

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