The cheapest 10 extra inches in TCL's range: 75 to 85 inches on the QM6K cost $50.00
Data study. Every size and price in TCL's US TV range, read from TCL's store feed on 2026-10-15T16:59 UTC.
The short answer
TV prices do not rise evenly with size. On TCL's QM6K, the 85-inch was $899.99 and the 75-inch $849.99: $50.00 for 10 more inches. Going from 85 to 98 inches cost $1,300.00. Both sizes were on sale against TCL's own compare-at prices that day, so the gap can change quickly. Across TCL's other series the 75 to 85 inch step ran higher, so check the step for the exact series you want.
Cost of each size step, by series
"Per extra inch" is the price difference from the next smaller size, divided by the inches gained.
Which TV size gives the most screen for the money?
In TCL's US range, the step from 75 to 85 inches is often cheap per extra inch. On the QM6K it cost $50.00 on 2026-10-15T16:59 UTC. The step up to 98 inches cost the most per inch in most series.
Is this every TV brand?
No. It is TCL's US store only, because TCL publishes a machine-readable product feed. Other brands price their size steps differently.
Do these prices change?
Yes, often. These are store prices on one date. Use them for the pattern, and check the live price before you buy.
