by Mastery Genius
i-Ready is an online learning platform for K-8 students that is used widely throughout schools in the United States. The i-Ready program allows parents and teacher to benchmark a child’s skill level in ready and math and provides personalized lessons depending on diagnostic scores.
If your child has recently taken an i-Ready Diagnostic test, you may be confused about what the score means and how to help your child improve. In this guide we break out typical i-Ready Diagnostic scores based on grade level (kindergarten through 8th grade) and time of year (fall, winter, and spring).
Click on your child’s grade below to see where students should be scoring depending on the time year. Remember – a score in the 50th percentile is considered “average”, so you can get a good idea of whether your student is behind or ahead of the curve and by how far.
Interested in helping your child improve in reading & math? Mastery Genius can help! For only $30 per month, we develop a personalized curriculum that pinpoints your child’s academic gaps and helps them master topics at their own pace – not the pace of an entire classroom.
i-Ready Diagnostic Scores & Percentiles by Grade
Click on your child’s grade below to get a better understanding of what their score means.
- Kindergarten
- 1st Grade
- 2nd Grade
- 3rd Grade
- 4th Grade
- 5th Grade
- 6th Grade
- 7th Grade
- 8th Grade
Kindergarten
Fall
Below are the diagnostic scores and corresponding percentiles for kindergarten students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=298 – 312 | <=286 – 307 |
10 – 19 | 313 – 321 | 309 – 321 |
20 – 29 | 322 – 328 | 322 – 329 |
30 – 39 | 329 – 335 | 330 – 335 |
40 – 49 | 335 – 341 | 336 – 341 |
50 – 59 | 342 – 347 | 341 – 347 |
60 – 69 | 347 – 352 | 348 – 356 |
70 – 79 | 353 – 360 | 357 – 366 |
80 – 89 | 361 – 370 | 367 – 382 |
90 – 99 | 371 – 392+ | 384 – 422+ |
Winter
Below are the diagnostic scores and corresponding percentiles for kindergarten students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=306 – 325 | <=296 – 325 |
10 – 19 | 326 – 338 | 328 – 341 |
20 – 29 | 339 – 346 | 342 – 352 |
30 – 39 | 347 – 353 | 353 – 361 |
40 – 49 | 354 – 360 | 362 – 370 |
50 – 59 | 360 – 366 | 371 – 380 |
60 – 69 | 367 – 372 | 381 – 392 |
70 – 79 | 373 – 379 | 393 – 403 |
80 – 89 | 380 – 388 | 404 – 413 |
90 – 99 | 389 – 414+ | 414 – 465+ |
Spring
Below are the diagnostic scores and corresponding percentiles for kindergarten students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <=313 – 339 | <=305 – 342 |
10 – 19 | 341 – 354 | 344 – 362 |
20 – 29 | 355 – 363 | 364 – 376 |
30 – 39 | 364 – 371 | 378 – 389 |
40 – 49 | 371 – 377 | 390 – 400 |
50 – 59 | 378 – 383 | 401 – 408 |
60 – 69 | 384 – 388 | 408 – 414 |
70 – 79 | 389 – 395 | 414 – 423 |
80 – 89 | 396 – 405 | 424 – 443 |
90 – 99 | 406 – 435+ | 447 – 504+ |
1st Grade
Fall
Below are the diagnostic scores and corresponding percentiles for 1st grade students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=312 – 338 | <=308 – 344 |
10 – 19 | 340 – 352 | 347 – 364 |
20 – 29 | 353 – 362 | 366 – 378 |
30 – 39 | 363 – 370 | 380 – 391 |
40 – 49 | 370 – 375 | 392 – 402 |
50 – 59 | 376 – 381 | 403 – 409 |
60 – 69 | 382 – 388 | 410 – 416 |
70 – 79 | 388 – 393 | 417 – 427 |
80 – 89 | 393 – 402 | 429 – 453 |
90 – 99 | 404 – 431+ | 456 – 508+ |
Winter
Below are the diagnostic scores and corresponding percentiles for 1st grade students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=323 – 356 | <=322 – 368 |
10 – 19 | 358 – 371 | 371 – 392 |
20 – 29 | 372 – 380 | 394 – 406 |
30 – 39 | 381 – 387 | 407 – 415 |
40 – 49 | 388 – 392 | 415 – 423 |
50 – 59 | 393 – 398 | 424 – 434 |
60 – 69 | 399 – 405 | 436 – 452 |
70 – 79 | 406 – 413 | 453 – 469 |
80 – 89 | 413 – 425 | 471 – 491 |
90 – 99 | 426 – 449+ | 494 – 535+ |
Spring
Below are the diagnostic scores and corresponding percentiles for 1st grade students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <=332 – 369 | <=332 – 386 |
10 – 19 | 370 – 383 | 390 – 410 |
20 – 29 | 385 – 393 | 411 – 422 |
30 – 39 | 393 – 400 | 423 – 436 |
40 – 49 | 401 – 407 | 438 – 453 |
50 – 59 | 407 – 413 | 454 – 467 |
60 – 69 | 414 – 421 | 468 – 480 |
70 – 79 | 422 – 430 | 482 – 495 |
80 – 89 | 430 – 439 | 497 – 516 |
90 – 99 | 441 – 463+ | 520 – 553+ |
2nd Grade
Fall
Below are the diagnostic scores and corresponding percentiles for 2nd grade students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=333 – 367 | <=339 – 389 |
10 – 19 | 369 – 381 | 393 – 411 |
20 – 29 | 382 – 390 | 413 – 424 |
30 – 39 | 390 – 396 | 425 – 443 |
40 – 49 | 396 – 402 | 443 – 459 |
50 – 59 | 402 – 408 | 460 – 473 |
60 – 69 | 409 – 414 | 475 – 487 |
70 – 79 | 414 – 422 | 489 – 503 |
80 – 89 | 423 – 434 | 505 – 522 |
90 – 99 | 435 – 458+ | 524 – 561+ |
Winter
Below are the diagnostic scores and corresponding percentiles for 2nd grade students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=348 – 381 | <=351 – 407 |
10 – 19 | 383 0 395 | 410 – 431 |
20 – 29 | 396 – 404 | 434 – 457 |
30 – 39 | 405 – 411 | 459 – 474 |
40 – 49 | 412 – 417 | 475 – 488 |
50 – 59 | 418 – 424 | 489 – 500 |
60 – 69 | 425 – 432 | 502 – 513 |
70 – 79 | 433 – 441 | 515 – 527 |
80 – 89 | 443 – 449 | 528 – 542 |
90 – 99 | 450 – 471+ | 544 – 579+ |
Spring
Below are the diagnostic scores and corresponding percentiles for 2nd grade students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <=355 – 391 | <=364 – 419 |
10 – 19 | 393 – 406 | 422 – 454 |
20 – 29 | 407 – 416 | 457 – 476 |
30 – 39 | 416 – 424 | 477 – 491 |
40 – 49 | 425 – 433 | 492 – 504 |
50 – 59 | 434 – 441 | 505 – 516 |
60 – 69 | 442 – 447 | 517 – 527 |
70 – 79 | 447 – 454 | 528 – 540 |
80 – 89 | 455 – 462 | 541 – 556 |
90 – 99 | 463 – 484+ | 558 – 592+ |
3rd Grade
Fall
Below are the diagnostic scores and corresponding percentiles for 3rd grade students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=354 – 387 | <=365 – 416 |
10 – 19 | 390 – 403 | 419 – 448 |
20 – 29 | 404 – 412 | 451 – 471 |
30 – 39 | 413 – 420 | 473 – 486 |
40 – 49 | 420 – 427 | 488 – 500 |
50 – 59 | 428 – 434 | 502 – 515 |
60 – 69 | 435 – 441 | 516 – 527 |
70 – 79 | 441 – 447 | 528 – 540 |
80 – 89 | 448 – 456 | 541 – 556 |
90 – 99 | 456 – 480+ | 558 – 595+ |
Winter
Below are the diagnostic scores and corresponding percentiles for 3rd grade students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=365 – 402 | <=372 – 432 |
10 – 19 | 404 – 419 | 437 – 472 |
20 – 29 | 420 – 429 | 474 – 492 |
30 – 39 | 430 – 437 | 494 – 509 |
40 – 49 | 437 – 444 | 512 – 521 |
50 – 59 | 444 – 449 | 522 – 532 |
60 – 69 | 450 – 455 | 534 – 544 |
70 – 79 | 455 – 461 | 545 – 557 |
80 – 89 | 462 – 469 | 558 – 573 |
90 – 99 | 471 – 496+ | 575 – 611+ |
Spring
Below are the diagnostic scores and corresponding percentiles for 3rd grade students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <=370 – 411 | <=378 – 446 |
10 – 19 | 413 – 429 | 452 – 484 |
20 – 29 | 431 – 441 | 486 – 505 |
30 – 39 | 441 – 449 | 507 – 520 |
40 – 49 | 450 – 458 | 522 – 533 |
50 – 59 | 458 – 464 | 534 – 545 |
60 – 69 | 465 – 471 | 546 – 557 |
70 – 79 | 472 – 479 | 558 – 570 |
80 – 89 | 480 – 489 | 571 – 586 |
90 – 99 | 491 – 513+ | 588 – 625+ |
4th Grade
Fall
Below are the diagnostic scores and corresponding percentiles for 4th grade students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=371 – 408 | <=382 – 447 |
10 – 19 | 410 – 425 | 453- 483 |
20 – 29 | 426 – 436 | 485 – 503 |
30 – 39 | 437 – 444 | 505 – 519 |
40 – 49 | 445 – 451 | 520 – 532 |
50 – 59 | 452 – 459 | 533 – 543 |
60 – 69 | 460 – 466 | 545 – 556 |
70 – 79 | 466 – 473 | 557 – 569 |
80 – 89 | 474 – 482 | 571 – 586 |
90 – 99 | 484 – 508+ | 588 – 627+ |
Winter
Below are the diagnostic scores and corresponding percentiles for 4th grade students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=380 – 419 | <=390 – 466 |
10 – 19 | 421 – 438 | 472 – 500 |
20 – 29 | 439 – 448 | 502 – 520 |
30 – 39 | 449 – 458 | 522 = 534 |
40 – 49 | 459 – 565 | 536 – 547 |
50 – 59 | 465 – 470 | 548 – 559 |
60 – 69 | 471 – 477 | 560 – 570 |
70 – 79 | 478 – 485 | 572 – 583 |
80 – 89 | 486 – 495 | 585 – 600 |
90 – 99 | 496 – 518+ | 603 – 638+ |
Spring
Below are the diagnostic scores and corresponding percentiles for 4th grade students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <=385 – 426 | <=393 – 473 |
10 – 19 | 429 – 447 | 478 – 509 |
20 – 29 | 448 – 461 | 512 – 528 |
30 – 39 | 462 – 469 | 530 – 543 |
40 – 49 | 470 – 478 | 545 – 557 |
50 – 59 | 479 – 485 | 558 – 569 |
60 – 69 | 486 – 492 | 570 – 581 |
70 – 79 | 493 – 501 | 582 – 593 |
80 – 89 | 502 – 513 | 595 – 612 |
90 – 99 | 514 – 530+ | 614 – 648+ |
5th Grade
Fall
Below are the diagnostic scores and corresponding percentiles for 5th grade students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=382 – 422 | <=401 – 475 |
10 – 19 | 425 – 443 | 479 – 509 |
20 – 29 | 444 – 454 | 513 – 529 |
30 – 39 | 455 – 462 | 530 – 543 |
40 – 49 | 463 – 470 | 545 – 556 |
50 – 59 | 470 – 477 | 558 – 568 |
60 – 69 | 478 – 483 | 569 – 581 |
70 – 79 | 484 – 491 | 582 – 594 |
80 – 89 | 492 – 502 | 596 – 614 |
90 – 99 | 503 – 524+ | 616 – 648+ |
Winter
Below are the diagnostic scores and corresponding percentiles for 5th grade students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=392 – 434 | <=405 – 488 |
10 – 19 | 437 – 452 | 493 – 522 |
20 – 29 | 453 – 464 | 524 – 541 |
30 – 39 | 465 – 472 | 543 – 556 |
40 – 49 | 473 – 480 | 558 – 568 |
50 – 59 | 480 – 487 | 570 – 580 |
60 – 69 | 487 – 494 | 582 – 592 |
70 – 79 | 494 – 501 | 593 – 607 |
80 – 89 | 502 – 512 | 609 – 623 |
90 – 99 | 512 – 535+ | 625 – 661+ |
Spring
Below are the diagnostic scores and corresponding percentiles for 5th grade students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <=396 – 439 | <=408 – 494 |
10 – 19 | 442 – 460 | 499 – 530 |
20 – 29 | 461 – 471 | 531 – 550 |
30 – 39 | 472 – 481 | 551 – 564 |
40 – 49 | 482 – 490 | 566 – 577 |
50 – 59 | 490 – 496 | 579 – 589 |
60 – 69 | 497 – 505 | 591 – 604 |
70 – 79 | 505 – 513 | 605 – 618 |
80 – 89 | 514 – 524 | 619 – 633 |
90 – 99 | 525 – 544+ | 635 – 671+ |
6th Grade
Fall
Below are the diagnostic scores and corresponding percentiles for 6th grade students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=391 – 431 | <=410 – 486 |
10 – 19 | 434 – 451 | 491 – 522 |
20 – 29 | 452 – 463 | 524 – 542 |
30 – 39 | 464 – 473 | 544 – 558 |
40 – 49 | 474 – 482 | 560 – 571 |
50 – 59 | 483 – 489 | 573 – 584 |
60 – 69 | 490 – 496 | 586 – 598 |
70 – 79 | 497 – 504 | 600 – 614 |
80 – 89 | 505 – 514 | 615 – 630 |
90 – 99 | 515 – 540 | 632 – 669+ |
Winter
Below are the diagnostic scores and corresponding percentiles for 6th grade students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=396 – 440 | <=412 – 495 |
10 – 19 | 442 – 459 | 500 – 531 |
20 – 29 | 460 – 471 | 534 – 552 |
30 – 39 | 472 – 481 | 554 – 567 |
40 – 49 | 482 – 489 | 569 – 581 |
50 – 59 | 490 – 496 | 582 – 593 |
60 – 69 | 497 – 504 | 595 – 608 |
70 – 79 | 505 – 513 | 610 – 622 |
80 – 89 | 513 – 524 | 623 – 638 |
90 – 99 | 526 – 550+ | 640 – 679+ |
Spring
Below are the diagnostic scores and corresponding percentiles for 6th grade students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <=399 – 442 | <=413 – 500 |
10 – 19 | 444 – 464 | 505 – 537 |
20 – 29 | 466 – 477 | 540 – 559 |
30 – 39 | 479 – 488 | 561 – 575 |
40 – 49 | 489 – 496 | 576 – 588 |
50 – 59 | 497 – 504 | 590 – 603 |
60 – 69 | 505 – 513 | 604 – 617 |
70 – 79 | 513 – 522 | 618 – 630 |
80 – 89 | 523 – 537 | 631 – 646 |
90 – 99 | 538 – 559+ | 648 – 682+ |
7th Grade
Fall
Below are the diagnostic scores and corresponding percentiles for 7th grade students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=401 – 441 | <=418 – 501 |
10 – 19 | 444 – 462 | 508 – 538 |
20 – 29 | 463 – 475 | 540 – 559 |
30 – 39 | 476 – 486 | 560 – 574 |
40 – 49 | 486 – 493 | 576 – 589 |
50 – 59 | 493 – 500 | 590 – 604 |
60 – 69 | 501 – 507 | 605 – 618 |
70 – 79 | 508 – 514 | 619 – 630 |
80 – 89 | 516 – 529 | 632 – 645 |
90 – 99 | 530 – 558+ | 648 – 687+ |
Winter
Below are the diagnostic scores and corresponding percentiles for 7th grade students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=402 – 444 | <=423 – 514 |
10 – 19 | 447 – 467 | 518 – 548 |
20 – 29 | 468 – 480 | 551 – 569 |
30 – 39 | 482 – 490 | 571 – 585 |
40 – 49 | 491 – 498 | 587 – 600 |
50 – 59 | 499 – 506 | 602 – 614 |
60 – 69 | 506 – 513 | 616 – 627 |
70 – 79 | 514 – 524 | 628 – 637 |
80 – 89 | 525 – 538 | 639 – 655 |
90 – 99 | 540 – 566+ | 657 – 695+ |
Spring
Below are the diagnostic scores and corresponding percentiles for 7th grade students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <=403 – 448 | <=424 – 516 |
10 – 19 | 451 – 471 | 522 – 551 |
20 – 29 | 473 – 486 | 554 – 575 |
30 – 39 | 487 – 495 | 577 – 591 |
40 – 49 | 496 – 503 | 593 – 608 |
50 – 59 | 504 – 513 | 609 – 621 |
60 – 69 | 513 – 521 | 622 – 632 |
70 – 79 | 522 – 532 | 633 – 644 |
80 – 89 | 533 – 548 | 645 – 660 |
90 – 99 | 550 – 575+ | 662 – 695+ |
8th Grade
Fall
Below are the diagnostic scores and corresponding percentiles for 8th grade students taken between the beginning of the school year and November 15th.
Percentile | Math | Reading |
1 – 9 | <=406 – 447 | <=431 – 518 |
10 – 19 | 450 – 469 | 523 – 550 |
20 – 29 | 471 – 483 | 555 – 573 |
30 – 39 | 484 – 492 | 575 – 589 |
40 – 49 | 493 – 500 | 591 – 605 |
50 – 59 | 501 – 509 | 607 – 619 |
60 – 69 | 510 – 517 | 620 – 631 |
70 – 79 | 518 – 527 | 632 – 641 |
80 – 89 | 529 – 543 | 642 – 660 |
90 – 99 | 545 – 572+ | 663 – 696+ |
Winter
Below are the diagnostic scores and corresponding percentiles for 8th grade students taken between the beginning November 16th and March 1st.
Percentile | Math | Reading |
1 – 9 | <=406 – 451 | <=434 – 525 |
10 – 19 | 454 – 474 | 531 – 562 |
20 – 29 | 476 – 488 | 564 – 583 |
30 – 39 | 489 – 496 | 584 – 600 |
40 – 49 | 497 – 505 | 601 – 615 |
50 – 59 | 506 – 515 | 616 – 626 |
60 – 69 | 515 – 524 | 627 – 636 |
70 – 79 | 525 – 536 | 637 – 648 |
80 – 89 | 537 – 551 | 650 – 666 |
90 – 99 | 552 – 579+ | 669 – 704+ |
Spring
Below are the diagnostic scores and corresponding percentiles for 8th grade students taken between the beginning March 2nd and the end of the school year.
Percentile | Math | Reading |
1 – 9 | <407 – 453 | <=434 – 529 |
10 – 19 | 457 – 478 | 535 – 567 |
20 – 29 | 480 – 491 | 569 – 589 |
30 – 39 | 492 – 500 | 590 – 607 |
40 – 49 | 501 – 511 | 609 – 621 |
50 – 59 | 512 – 521 | 622 – 632 |
60 – 69 | 522 – 531 | 633 – 642 |
70 – 79 | 532 – 542 | 643 – 654 |
80 – 89 | 544 – 556 | 655 – 669 |
90 – 99 | 558 – 585+ | 671 – 704+ |
Conclusion
We hope this guide has helped you get a better idea of what your child’s i-Ready Diagnostic score means and where they fall in the percentile range. For more detailed data, please check out the official i-Ready Diagnostic National Norms Tables for Reading and Mathematics resource.