Small tools for specific problems.
Tools I built because
I needed them.
I keep running into narrow problems that deserve a straight answer and don't have one online. So I work them out, and build the thing I wanted to find. That work ends up here. Everything runs in your browser, and there's nothing to install or sign up for.
- Tools
- 59
- Subjects
- 7
Browse by subject
See everythingDrivetrain
Gearing, speed, traction and turning, from a first gear ratio through to a tuned autonomous.
20 toolsLifts & Arms
Torque, geometry and packaging for the mechanism that gets game objects off the floor.
8 toolsIntakes & Shooters
Grabbing, holding and launching game objects, and measuring how often it actually works.
8 toolsPneumatics
Air budget across a match, and how reliably a cylinder does its job.
6 toolsAutonomous
Planning routes, converting field coordinates, and proving a program fits the time available.
8 toolsWhole Robot
Tools that look across every subsystem at once: legality, structure, diagnostics and documentation.
5 toolsStrategy
What the robot is worth in a match, and which decisions during one are worth making.
4 toolsStart here
Drivetrain Speed Calculator
LiveCartridge, gearing and wheel size in, top speed in ft/s out. The most asked question in VEX, with an honest note on what it leaves out.
Drivetrain
Gear Ratio Calculator
LiveWhat a pair of gears does to your speed and torque, how far apart to mount them, and how many holes that works out to.
Drivetrain
Pushing Force & Traction Limit
LiveWhether your drive is limited by motor torque or by wheels slipping. Most teams guess wrong, then rebuild the wrong half.
Drivetrain
Motor Power Budget Checker
LiveV5RC caps motor power in watts, not motor count. Check your drive against the 55W subsystem cap and your robot against the 88W total.
Drivetrain
How this works
Each tool does one thing. Nothing here asks you to sign up, nothing sits behind a paywall, and no page tracks you between visits.
Where a tool leans on a published figure or a judgment call, it says so on the page and links to the source. A number you can't check is a number you shouldn't trust, and that includes mine.
If a tool gives you a wrong answer, I want to know. About has the details.