About AxleMath

AxleMath started with one problem: you're sitting at a CAT scale with a ticket that says your drives are 1,100 pounds over, and every "tandem calculator" Google offers is an app-store download with intrusive ads, a login screen, or math you can't trust. All you need is a number and a direction.

So that's what these tools do. Every calculator on this site:

• Works in the browser — nothing to install, loads on truck-stop wifi.
• Answers like a driver needs — "slide 5 holes forward," not a wall of decimals.
• Shows its work — the formula and assumptions are printed under every tool.
• Stays free — supported by ads, never by locking the answer behind a signup.

The results print out like the scale ticket in your hand because that's the format the answer has to match. Start with the tandem slide calculator — it's the tool the whole site was built around.

The fine print

Everything here is an estimate. Trailers slide differently, states write their own bridge laws, and the IRS moves rates. Verify axle weights at a certified scale, and run tax questions past a professional before filing. If a calculator ever gives you a number that doesn't match the reweigh, we want to know about it.

Contact

Questions, corrections, or a tool you wish existed: hello@axlemath.com