Free tools
Five working calculators, no account, no email. They all run in your browser against the same catalogue the planner uses.
Why these five
Each one answers a question that comes up constantly and that the rest of the internet answers with "it depends". The offset checker exists because wheels rubbing at full lock is the most specific, most expensive and least-served problem in a drift build. The budget calculator exists because every cost guide gives a range and none of them tell you what your particular number reaches. The tire calculator exists because consumables are about a fifth of a real first-year budget and nobody puts a figure on them.
They are free because they are the honest version of a sales pitch: if the tool is useful, the planner probably is too.
What each one is actually for
Angle kit offset checker
The most specific and most expensive mistake in a drift build is buying a set of wheels that rub at full lock. It happens because an angle kit swings the front wheel through a much larger arc than the factory geometry ever did, so an offset that cleared before can foul the control arm, the tie rod or the inner arch. This tool compares your width, offset and tire width against the window that commonly clears on your chassis, with and without a kit fitted, and tells you which direction to move.
Drift budget calculator
Every cost guide in this niche gives you a range. None of them tell you what your particular number reaches. This one runs the real planner against your budget, chassis and goal level, shows which phase you get to, and adds the per-season consumables bill - so the answer is "this gets you through phase 1 with $1,200 a season to run it", not "builds cost $3,000 to $10,000".
Tire cost per event
Tires and entry fees were about a fifth of a documented year-one drift budget, and they appear in no parts list anywhere. Put in your tire prices, how many rear pairs you get through, how many events you do and your entry fee, and it gives you the per-event and per-season numbers. Most people are surprised, which is the point.
Welded vs LSD
The first real decision in a build, with a four-to-eight-times price gap and almost no performance difference. Four questions - is the car also your transport, what is your power target, what is your budget, how long will you keep it - and you get a recommendation with the reasoning rather than another "it depends".
What breaks first
Pick your chassis and a power target and it lists what fails, in order, with your chassis' own known weak points on top. Useful for deciding whether you can afford the power you were planning, and for working out what belongs in the trailer.
They run entirely in your browser
All five load the catalogue as a small JSON file and calculate locally. No request leaves your browser when
you change an input, nothing is stored, and no account is involved. They also work from a bookmark - the offset
checker accepts a ?chassis= parameter, so a link to it can arrive pre-set for a specific
platform.
What they do not do is work without JavaScript. Every other page on this site - chassis guides, plans, articles, legal pages - renders completely without it.