Free PDF converter & unit converters
Clear tools. Real explanations.
Word to PDF, PDF to Word, 53 detailed unit converters, and 25 in-depth guides — formulas, tables, and practical context. Free, no account required.
Why ConvertHub?
ConvertHub helps people convert measurements and documents accurately without installing software or creating an account. We focus on clear explanations, privacy, and tools that work on any device.
We do not flood the web with hundreds of near-identical calculator URLs. Each dedicated converter page has pair-specific use cases, tips, and tables. Category hubs include a full unit picker for less common combinations. PDF tools use LibreOffice and pdf2docx; uploads are deleted after download.
Browse by category
Length
Centimeters, inches, feet, miles, and more.
12 detailed converters →
Weight
Kilograms, pounds, ounces, stones, and tons.
9 detailed converters →
Temperature
Celsius, Fahrenheit, and Kelvin.
6 detailed converters →
Volume
Liters, gallons, cups, milliliters, and more.
11 detailed converters →
Area
Square meters, square feet, acres, and hectares.
7 detailed converters →
Speed
km/h, mph, knots, and meters per second.
8 detailed converters →
Popular converters
- Centimeter to Inch
cm → in
- Kilogram to Pound
kg → lb
- Celsius to Fahrenheit
°C → °F
- Liter to US gallon
L → gal
- Kilometer to Mile
km → mi
- Mile per hour to Kilometer per hour
mph → km/h
- Square meter to Square foot
m² → ft²
- Pound to Kilogram
lb → kg
- Inch to Centimeter
in → cm
- Fahrenheit to Celsius
°F → °C
- US gallon to Liter
gal → L
- Foot to Meter
ft → m
File converters
Guides
In-depth conversion & PDF guides
Long-form articles on metric vs imperial, temperature, cooking measurements, driving abroad, luggage limits, fuel economy, PDF workflows, and converter safety — each written for a real problem, not a keyword.
25 articles →
- Metric vs Imperial: When to Use Which System 7 min read
- Celsius vs Fahrenheit: A Complete Guide 6 min read
- US Gallon vs Imperial Gallon: What Is the Difference? 6 min read
- How to Convert Units: Step-by-Step Guide 7 min read
- Cooking Measurements: Cups, Tablespoons, and Milliliters 7 min read
- How to Convert PDF to Word (Step-by-Step) 8 min read
- How to Convert Word to PDF (Step-by-Step) 8 min read
- Is It Safe to Use Online File Converters? 7 min read
Trust & quality
We publish 25 in-depth guides (roughly 900–1,000+ words each), maintain an About page with our editorial standards, and document how conversion factors are sourced. Every dedicated converter page includes pair-specific use cases and tips. Less common unit combinations live in category hubs — not as empty duplicate URLs. Unit math runs locally; PDF uploads are deleted after download. Read our Disclaimer and Privacy Policy, or reach us via Contact.