Calcnio blog · 27 published
The blog that shows the math.
Clear, worked-out explanations of how borrowing, interest, saving and everyday numbers really work, each with real figures and a free calculator to try your own.
How to Make a Scanned PDF Searchable With OCR
Make a scanned PDF searchable with OCR for free, in your browser without uploading, in Preview on a Mac or with Google Drive, plus tips for more accurate text.
Read the post
Latest posts
Page 1 of 3-
Loans
Car Loan in Pakistan: What You Really Pay in Markup
See what a car loan in Pakistan really costs: monthly instalment, total markup, insurance and SBP rules on down payment and tenure, with worked examples in rupees. -
Saving & investing
How to Calculate Zakat in Pakistan: Nisab, Gold and Cash
Learn how to calculate zakat in Pakistan step by step: the silver and gold nisab in tola, gold by karat, cash, savings and debts, with a full family example. -
Budgeting
Income Tax on Salary in Pakistan 2026-27: Slabs and Examples
See how income tax on salary works in Pakistan for 2026-27: the new FBR slabs, monthly tax at common salaries, tax on a bonus, and worked examples step by step. -
Saving & investing
Trump Accounts Explained: How a $1,000 Baby Account Could Grow by 18
Trump Accounts explained for parents: who gets the $1,000, how to elect it on Form 4547, the $5,000 yearly limit, and what the account could grow to by 18. -
Loans
How Much Car Can I Afford? The 20/4/10 Rule Explained
How much car can I afford? Use the 20/4/10 rule with a worked example, a budget table by income, and the depreciation math that shows why the rule is strict. -
Math & everyday
How to Calculate a Percentage: 5 Everyday Examples
Learn how to calculate a percentage with three simple formulas and five everyday examples: sales tax, share of pay, discounts, raises and prices before tax. -
Loans
Car Loan Interest Deduction: How Much the New Write-Off Really Saves
The car loan interest deduction lets you write off up to $10,000 a year for 2025 to 2028. See who qualifies and what it really saves on a $40,000 loan. -
Budgeting
2027 Social Security COLA: What the 3.6% Raise Means for Your Check
The 2027 Social Security COLA is 3.6%. See what it adds to typical checks, when SSI and Social Security raises arrive, and why your net raise may be smaller.
Run your own numbers
Every post links to a free calculator. Change any input and the answer updates instantly.