Conversions, Calculators and Practical Guides
Quick converters, calculators, reference tables and practical guides for 3D printing, electronics, EV charging, electrical work and everyday measurements.
Smart convert
Type the conversion the way you would search for it. This is useful when you know the value and units but do not want to browse first.
Why CovertItAll
Unit conversions come up all the time. You might be comparing product sizes, working from a recipe, or reading a spec sheet that uses different units than you're used to. Since measurements vary between countries and industries, having a quick way to switch between them saves a lot of time.
CovertItAll does one thing well. You type in a value and you get the answer right away. There's no sign-up, no pop-ups, and the result is always the first thing you see on the page. It works the same way on a phone as it does on a laptop.
Built for practical jobs
Use CovertItAll when you're ordering parts online, checking print material specs, working out shipping weights, or reading values straight from a datasheet.
Avoid costly mistakes
It's easy to mix up units when you're moving between metric and imperial systems. We show the conversion alongside a bit of context, so you know what the number means before you order, build or measure something.
Useful follow-up paths
Each converter page links to related tools and short guides. If you need to do something extra after the conversion, the next step is usually one click away.
Popular converters
📏 CM to Inch
Useful for buying, room clearances, screens and general size checks.
⚖️ KG to LBS
Handy for shipping, fitness logs, luggage and product weights.
🌐 Mbps to MB/s
Translate internet speed into the file transfer rate software often shows.
🖨️ Filament Weight to Length
Plan 3D prints by checking whether a partial spool is enough.
⚡ Volts to mV
Quick scale changes for datasheets, sensors and bench checks.
🔌 Ohm's Law
Work out missing circuit values before wiring or powering up.
💱 EUR to USD
Use a live exchange quote for travel budgets, online shopping and fast price comparison.
👟 Shoe Size Converter
Compare EU, US, UK, Japan, Korea and Mondopoint sizes before ordering shoes from another market.
Main categories
Length and size
For shopping, room planning, printed dimensions and workshop measuring.
Weight and shipping
For luggage, parcel checks, fitness tracking and product comparisons.
Data and speed
For storage planning, backups, downloads and network expectations.
3D printing
For spool planning, material comparison and practical print prep.
Electronics
For unit prefixes, bench calculations and simple circuit checks.
Explore by topic
CovertItAll covers more than simple number conversions. Each topic area has its own hub with calculators, guides and practical context for that subject.
3D printing
Filament calculators, slicer guides, material comparisons and printer setup walkthroughs.
EV & automotive
EV charging calculators, range estimators, home charging guides and battery health tools.
Engineering
Electronics calculators, pressure, torque, flow rate and common workshop conversions.
Health & fitness
BMI, ideal weight, water intake, calorie conversion and body measurement tools.
Travel
Currency, temperature, distance, timezone and luggage weight converters for trips abroad.
Finance & cost
VAT calculator, discount tool, salary converter, fuel cost and kWh energy cost tools.
In-depth guides
Beyond the calculators, CovertItAll has practical guides on specific technical topics. These go deeper than a single conversion and explain the context you need to make good decisions.
Home EV charging
Everything you need to know before installing a home charger: cable types, speeds, costs and setup.
EV battery health
How EV battery capacity degrades over time, what affects it, and how to read state-of-health data.
First print with PLA
A practical walkthrough for getting your first successful FDM print with PLA filament.
Choosing a nozzle size
When to use 0.4 mm, 0.6 mm or 0.8 mm nozzles and how the choice affects speed and detail.
PETG vs PLA
A direct comparison to help you decide which material fits your print requirements.
Bambu Studio presets
What the built-in Bambu slicer profiles actually do and when to change them.
Recently used and featured
Your recent converters
Featured articles
3D Printing Filament Guide
Understand weight, density and why equal spool weights do not always mean equal usable length.
Read More →Understanding Data Units
Learn why drive sizes, download speeds and operating system reports can look inconsistent while still being normal.
Read More →How to Convert Filament Usage Before a Long 3D Print
Estimate spool capacity before a long print and avoid failures caused by guesswork and mixed units.
Read More →Pressure Units in Engineering
See where PSI and bar show up and why reading the wrong scale wastes time in real workshop jobs.
Read More →How to get reliable results from a conversion
Getting the right number is the easy part. The harder part is staying in one unit system for the rest of the job. If you flip between metric and imperial halfway through a project, rounding errors add up and your final result can be off by enough to cause real problems.
This applies to everyday situations like buying furniture or checking luggage limits, and to more technical work like 3D printing or electronics. A good conversion page should give you enough information to actually finish the job, instead of leaving you with one isolated number.
For buyers
Compare dimensions, weights and prices before ordering from international stores.
For makers
Check print sizes, spool estimates and electrical values before material or time gets wasted.
For everyday use
Translate temperatures, cooking values, travel measurements and household specs quickly and cleanly.