Bambu Lab A1 vs Prusa MK4S: print cost head-to-head

Specs side by side

Sample calculation

Same input on both columns: 50 g PLA part, 6 h print time, 8% failure rate. Energy cost held at $0.18/kWh, amortization uses each printer's regional price — so both the machine and its price drive the numbers.

Verdict by dimension

• Cheaper to buy

  Bambu Lab A1

  Bambu Lab A1 costs $399 vs $899 for the Prusa MK4S — a lower upfront price also means less amortization per print.

• Cheaper to run

  Tie

  Both printers land within the noise threshold for this dimension.

• Longer useful life

  Prusa MK4S

  Prusa MK4S is rated at 25,000 h vs 20,000 h for the Bambu Lab A1, so amortization spreads over more printing hours.

• Larger build volume

  Bambu Lab A1

  Bambu Lab A1 ships with 256 × 256 × 256 mm build volume vs 250 × 210 × 220 mm on the Prusa MK4S — bigger plates or batched parts fit without splitting.

• More recent release

  Tie

  Both printers land within the noise threshold for this dimension.

Over a 5-year horizon, the Prusa MK4S amortizes 1.3× more print-hours than the Bambu Lab A1.

Frequently asked questions

Is the Bambu Lab A1 better than the Prusa MK4S?

Neither is strictly better — it depends on what you print. The Prusa MK4S is cheaper to run, the Bambu Lab A1 has the larger build volume, and the Bambu Lab A1 is the more recent release. Match the winner on the dimension you care about most.

What's the difference between the Bambu Lab A1 and the Prusa MK4S?

The Bambu Lab A1 is priced at $399 with a 256 × 256 × 256 mm build volume; the Prusa MK4S is $899 with 250 × 210 × 220 mm. Beyond price and volume, they differ in power draw, rated life and release year — see the verdict table above.

Which is cheaper, the Bambu Lab A1 or the Prusa MK4S?

The Bambu Lab A1 is cheaper to buy at $399 vs $899 for the Prusa MK4S. Factoring energy and amortization, the Prusa MK4S also has the lower per-print running cost — run your own numbers in the calculator to be sure.