Fledgling Schools Chancellor Richard Carranza is blasting dozens of public high schools that screen for high-achieving students as racially biased — but the city’s own data belie his claim.

At a conference for principals last week, Carranza criticized the 80 of 430 city high schools that exclusively admit students based on their middle-school test scores, grades, attendance and punctuality.

“The system of screens, the system of selectivity, the system of privilege that determines which kids get to go where . . . It’s segregating our schools,” he told the educators, according to Politico.

While the city’s eight “specialized” high schools enroll only 10 percent black and Hispanic students, the city’s screened high schools are far from segregated.

Overall, 63 percent of students in those 80 schools are black or Hispanic, with 26 percent black and 37 percent Hispanic, Department of Education stats show.

Black and Latino kids make up 68 percent of all city students.

“The DOE data fly in the face of the chancellor’s negative comments on screened schools,” said education-policy consultant David Rubel.

He analyzed the data at 31 high-performing screened high schools where entering kids had average scores of “proficient” or higher on state English tests.

At those schools, 42 percent of the students are black or Hispanic.

“Anyone who wants to attack these schools should understand they might be hurting the students they’re trying to help,” Rubel said.

About half of the top 31 screened schools have black and Latino populations exceeding 40 percent, the data show.

At Benjamin Banneker Academy in Brooklyn, blacks and Latinos make up 93 percent of students. The school, which focuses on black history and culture, had a 92 percent graduation rate last year. And 60 percent of the grads were deemed college-ready, well above the 37 percent city average.

The problem is not screened schools, Rubel contends, but the dearth of them — and their unequal distribution. While Manhattan has 17 of the 50 top screened schools, The Bronx has none.

And the number of applicants far exceeds seats. In 2017, about 31,000 city students scored proficient or better on the state’s eighth-grade English exams but had to vie for 12,000 spots in the 50 top screened schools.

“There’s a huge gap between supply and demand,” Rubel said.

Carranza’s anti-screen screed came in off-the-cuff remarks at the National Principals Leadership Institute in Manhattan on Monday.

“I want to understand the . . . systems and structures that have created a permanent underclass in New York City,” he said.

Carranza, hired in March, and Mayor de Blasio want to revamp admission to the city’s eight specialized high schools, which select kids based solely on the Specialized High School Admissions Test.

They want to drop that test and reserve 90 to 95 percent of seats for the top 7 percent of students from every city middle school, based on their test scores and grades. But at many middle schools, kids perform at levels lower than required for admission at screened schools.

Additional reporting by Anna Sanders