Screw weight & quantity estimator
Two jobs in one: work out what a batch of screws will weigh before you order, or drop a pile on a kitchen scale and find out roughly how many you have without counting them.
Result
566 mg per screw
100 of them weigh about 56.6 g — useful for shipping bands and for spotting a listing that is selling far fewer screws than the photo suggests.
Count by weighing
Weigh ten screws first and divide if you want a tighter number — head shape and plating change the figure by a few percent.
Keep going
Stripped thread repair sizer
Pick between a bigger screw, an insert or a heli-coil — with the drill size for each route.
Repair kit builder
Build a screw assortment for laptops, phones, drones or 3D printers and see exactly what to buy.
Screw size finder
Type in what you measured with a caliper and get the metric size, pitch and likely length.
Tap & clearance hole calculator
The exact drill size to tap M1.2 to M6, plus close and normal clearance holes.