Blog
Practical guides for developers — with free tools to try inline.
How to Calculate Your Due Date
Estimate your pregnancy due date from your last menstrual period—with examples and a free calculator.
Mortgage Calculator: How Much House Can You Afford?
Estimate monthly payments and total interest with our free mortgage calculator.
Currency Converter: How Exchange Rates Work
Understand exchange rates and convert currencies with live indicative rates.
Compound Interest Explained with Examples
See how compound interest and monthly contributions grow savings over time.
JPG to PNG: When to Convert and Why
Learn when PNG beats JPEG and convert files locally in seconds.
Free PDF Tools Online (Merge & Split)
Combine or extract PDF pages without installing software.
Best Free Kitchen Tools Online (No Signup)
Recipe scaling, oven temps, and cup-to-gram conversions—all in your browser.
Free Image Tools That Run in Your Browser
Compress, resize, convert JPG to PNG, and generate QR codes—privately.
Essential Free Online Tools for Daily Life
Kitchen, image, and PDF tools you can use in the browser—no downloads, no signup.
How Much Water Should You Drink Per Day?
Learn simple rules for daily water intake based on body weight.
How to Split a PDF and Extract Pages
Pull out page ranges from a PDF locally—private and free.
How to Resize Images for Web, Email, and Social Media
Set exact pixel dimensions with aspect ratio lock—free in your browser.
QR Code Generator: When and How to Use Them
Create QR codes for URLs, Wi-Fi, and menus—free and instant.
How to Merge PDF Files Online for Free
Combine multiple PDFs into one file—processed entirely in your browser.
kg to lbs: How to Convert Weight Units
Convert kilograms to pounds and ounces with formulas and examples.
How Many Calories Should You Eat Daily?
Learn how to estimate daily calorie needs using BMR and activity level.
How to Compress Images Without Losing Quality
Reduce JPG file size in your browser—no upload, no signup.
cm to Inches: Quick Conversion Guide
Convert centimeters to inches and feet with formulas and a free converter.
How to Split a Restaurant Bill Fairly
Learn fair ways to split a restaurant bill among friends—with and without itemized splits.
How to Scale a Recipe for More or Fewer Servings
Double or halve any recipe with simple math and our free recipe scaler tool.
Celsius vs Fahrenheit: Oven Temperature Guide
Convert oven temps between Celsius, Fahrenheit, and Gas Mark—with a free converter.
Ideal Body Weight: Formulas and What They Mean
Compare Devine, Robinson, and Miller ideal weight formulas and what they tell you.
How to Calculate Discounts and Sale Prices
Learn how to calculate sale prices after a percentage discount—with examples.
Cooking Measurements: Cups to Grams Conversion
Convert cups and tablespoons to grams for flour, sugar, butter, and more.
Percentage Math Made Easy (With Real Examples)
Learn how to find percentages, calculate discounts, and percent change—with a free percentage calculator.
How Much Should You Tip? A Complete Guide (2026)
Learn standard tipping percentages in the US and how to calculate tip and split bills—with examples and a free tip calculator.
BMI Explained: What Your Number Really Means
Understand BMI categories, limitations, and healthy weight ranges—with a free BMI calculator.