Practical guide 3 min read
Recall classes explained: Class I, II and III
What the FDA's recall classes, Canada's classes and types, and UK and EU alert levels mean, with how often each one comes up.
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33 guidesPractical guide 3 min read
How to check if your car has a recall
Find the recalls for your make and model, confirm with your VIN whether your car is affected, and know what do-not-drive and park-outside warnings mean.
Practical guide 3 min read
What to do if something you own is recalled
Refunds, repairs, replacements and proof of destruction: what to expect, and how to handle recalled food, medicines, batteries and children's products safely.
Practical guide 3 min read
How to check if something you own has been recalled
Search by the brand, model or lot number on the label, narrow it down by country and category, and confirm your product is really one of the affected ones.
Practical guide 3 min read
How to compress a PDF to 100 KB for an upload form
Get a PDF under 100 KB, 200 KB or 1 MB for an application portal: what the tool tries first, why pages sometimes become images, and what to do if it won't fit.
Practical guide 3 min read
How to make a PDF smaller without losing quality
Shrink the photos and scans inside a PDF and leave its text sharp: which compression level to pick, what changes, and what to do when a PDF won't shrink.
Practical guide 2 min read
How to convert running pace between per km and per mile
The formula, conversion tables for common paces, and the decimal mistake that throws pace conversions off by seconds.
Practical guide 3 min read
How to plan your splits for any fitness race
Build any race from runs, stations and transitions, predict your finish time, and turn a goal time into a target for every leg.
Practical guide 3 min read
How to price handmade items, including Etsy fees
Solve for a price that covers your costs, your hourly rate, a profit and marketplace fees, and check what a price you have in mind really pays.
Practical guide 3 min read
How to work out what a handmade item costs to make
Add up materials, your time and overhead per item, choose between materials used and bought, and see why batches cost less.
Practical guide 3 min read
How to work out what a 3D print costs
Material, electricity, printer wear, failed prints and your time: the full cost of a print, with a worked example and where to find each number.
Practical guide 4 min read
How much wax and fragrance oil does a candle need?
Size any jar from the water it holds, share the fill between wax and fragrance oil, and scale up to a batch, with an 8 oz jar worked through.