A website collected the marksrank data from various students who gave exam in IITJEE 2007.
We collected data of more than 50 students who gave JEE 2007. This data is helpful in knowing what rank they scored at what marks.
Following table can also be used to expect your rank in JEE 2008.
IITJEE 2008 exams were difficult as compared to IITJEE 2007 exams. So this table cannot be used directly.
To use this table to know your expected rank, use the following rule:
If your are expecting x marks, then calculate y where
y = x + x/8 if you are scoring more than 350,
y = x + x/7 if you are scoring between 300 and 350
y = x + x/6 if you are scoring between 260 and 300
y = x + x/5 if you are scoring less than 260
Now check y in the following table (refer middle column) to know your expected rank in IITJEE 2008.
Note: This data is the actual rank and marks students got in IITJEE 2007 exams.
IITJEE 2007 
Total Marks scored in IITJEE 2007 Papers out of 492 
Normalized Total Marks scored in IITJEE 2007 Papers out of 486 (y)

Al India Rank scored in IITJEE 2007 Result

427 
422

2

419 
414

6

402 
398

19

393 
389

27

381 
377

56

374 
370

77

371 
367

95

354 
350

168

351 
347

190

349 
345

201

344 
340

248

343 
339

258

339 
335

300

337 
333

318

327 
324

444

322 
319

523

320 
317

555

317 
314

583

314 
311

658

313 
310

665

312 
309

698

311 
308

721

310 
307

730

308 
305

766

303 
300

888

302 
299

920

300 
297

957

298 
295

1008

295 
292

1098

290 
287

1218

289 
286

1284

286 
283

1342

282 
279

1375

285 
282

1410

281 
278

1525

280 
277

1674

272 
269

1926

271 
268

1973

268 
265

2144

267 
264

2183

264 
261

2361

265 
262

2410

260 
257

2568

256 
253

2773

255 
252

2851

253 
250

3004

248 
245

3253

247 
244

3370

246 
243

3476

245 
243

3512

243 
241

3659

244 
242

3704

240 
238

3870

234 
232

4290

237 
235

4345

232 
230

4435

230 
228

4649

229 
227

4719

225 
223

5072

224 
222

5183

217 
215

5838

As everybody would have heard by now that IITJEE 2008 papers are difficult as compared to IITJEE 2007 papers.
Especially the mathematics papers were tricky and definitely less scoring than last year’s papers. I would say 2530% high on difficulty as compared to JEE 2007 papers. Chemistry was also bit difficult this year, say 10% difficult.
Physics paperI was easier than last year’s papers but paper  II was definitely little tougher. So overall degree of difficulty of Physics papers in IITJEE 2008 would remain same as it was in IITJEE 2007.
Overall performance level will go down this year.
Based on our experience and data calculations, we speculate the following data.
How to use this data?
See how much marks you are getting by comparing your answers and refer the following table to know what rank you can expect in IITJEE 2008 result.
Note: This is just a speculation based on expert judgment. So it will give you a rough idea. There is no authenticity of this data.
IITJEE 2008 
Marks Range scored in IITJEE 2008 Papers out of 486 
Your Expected Rank

370 and above 
150

335369 
50100

310334 
100250

280309 
250500

260279 
5001000

240259 
10001500

230239 
15002000

220229 
20002500

210219 
25003500

190209 
35005000

Source: 100percentile.com