The everyday toolkit
Practical Guides
Step-by-step guides with worked examples for QR codes, image editing, calculations and Cambodia’s reference exchange rates.
Start with the task you need to complete. Each guide includes specific steps, an example and limits to check before using the result.
QR codes
How to create a QR code for a business
Create a menu or business-card QR code, test the destination and avoid common printing and logo mistakes.
Published
Related tool: QR Code Generator
QR codes
PNG vs SVG for QR code printing
Choose a QR download format, work out pixel requirements and test the final printed artwork.
Published
Related tool: QR Code Generator
Images
How to resize images without stretching
Keep image proportions, calculate new dimensions and decide when cropping is better than resizing.
Published
Related tool: Resize Images
Images
JPEG vs PNG vs WebP for your images
Choose a photo or logo format, preserve transparency and compare exports instead of assuming a smaller file.
Published
Related tool: Convert Images
Calculators
How to estimate monthly loan payments
Use a fixed-rate loan example to understand monthly payments, total interest and the costs this calculator excludes.
Published
Related tool: Loan Payment Calculator
Calculators
Profit margin vs markup: pricing with the right percentage
Compare margin and markup using the same cost and selling price, then calculate a price for a target margin.
Published
Related tool: Profit Margin Calculator
Calculators
How to add tax or extract it from an inclusive price
Understand net, tax and gross amounts with a worked example and avoid subtracting the wrong percentage.
Published
Related tool: VAT / Tax Calculator
Currency
Understanding Cambodia’s MEF reference exchange rates
Read quote units and dates, convert through KHR and compare reference rates with a provider’s actual quote.
Published
Related tool: Currency Converter
Images
How to compress images for an upload without losing too much quality
Meet an upload limit by balancing dimensions, JPEG or WebP quality, transparency and visible detail. Compare the downloaded result with your original.
Published
Related tool: Image Compressor
Calculators
How to calculate discounts and percentages, including successive reductions
Calculate a sale price, check a percentage share and distinguish a second discount from simply adding two rates.
Published
Related tool: Discount Calculator