The ZixoTools Blog
Tutorials, guides, and ideas to help you get the most out of professional online tools.
How to Calculate Your GPA on the 4.0 Scale (and Actually Raise It)
GPA is weighted by credit hours, not a simple average of your grades. Here is how the calculation works, with worked examples for semester and cumulative GPA.
Macros Explained: How to Set Your Calories, Protein, Carbs and Fat
How to calculate your daily calories from BMR and activity level, then split them into protein, carbs and fat — with a full worked example and what to do when progress stalls.
How Much Protein Do You Actually Need Per Day?
The 0.8 g/kg RDA is a minimum to avoid deficiency, not a target for anyone training. Here is what the research supports, with a simple way to hit it.
Is Refinancing Worth It? Break-Even Point and Interest Saved
Refinancing is worth it if you stay past the break-even point. Here is how to calculate it, and why a lower monthly payment can still cost you more overall.
How Much Do You Need to Retire? The 4% Rule and Compound Interest
What the 4% withdrawal rule really means, why inflation makes big retirement numbers smaller than they look, and how to check if your contributions are on track.
Debt Snowball vs Avalanche: Which Method Saves More Interest?
The debt avalanche always costs less interest. The snowball clears accounts sooner. Here is how both work, and an honest way to decide which one you should use.
Rent vs Buy: How Many Years Until Buying Actually Wins?
Comparing rent against a mortgage payment always flatters buying. Here is how to compare net wealth properly, and what really decides the break-even point.
How Much Stamp Duty Land Tax Will You Pay in 2026?
Work out your Stamp Duty Land Tax bill in England and Northern Ireland, including first-time buyer relief and the 5% second home surcharge, with worked examples.
Why You Must Stop Creating Your Own Passwords
Understanding Base64 Encoding: A Guide for Developers
How to Accurately Calculate Your True Take-Home Salary in Singapore
Generating Un-hijackable QR Codes for Restaurant Menus
Visualizing the Compound Growth of Your RRSP
How to Format PDF Documents for a CRA Audit
How to Decode Tracking URLs for British E-commerce
The Safest Way to Merge Confidential HMRC Tax Documents
The Ultimate Guide to Calculating GST on Freelance Invoices
How to Perfectly Compress Images for PAN and Aadhaar KYC Uploads
Why Your 401(k) Needs Compound Interest to Survive Inflation
How to Compress Large Files for IRS Tax Portal Uploads
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