How to cut mattress/cushion foam?

[Froggy1936]

Hey emoney  any good ideas on cutting foam mattress (what tool for cutting cushion size pieces ) from a king size full foam mattress?  I have option of a free king size and was thinking of replaceing all cushions in my R/V  But have no idea of how to cleanly and straight cut this mattress  ??   Hot wire ? blade ? This will need to slice off approx 4" X 2 ft X 4 ft pieces  Frank

[Lefty]

Upholstry shops typically use an ordinary electric carving knife... just like the old ones used to carve a turkey with.

[joanfenn]

I had luck with a bread knife.  Just went slow and it worked for me.

[DonD]

Another vote for electric knife.

[LJ-TJ]

 D:oH! Hate to sound like a broken record but yep count me in for electric bread knife. i??

[JDxeper]

Frank
Use an old cushion to go to school and practise on.  Need a report so we'll know what to do.

Happy cutting.

[Froggy1936]

Will update after project & purchase of electric knife Never even thought of that   Thanks Frank