Floor Framing Calculators
Span tables decide the member, and the member decides the price. Both calculators here start from the span you have rather than the joist you hoped to use.
In this topic
- Floor Joist Span Calculator
The smallest joist that clears your span, and what it costs.
- Floor Truss vs I-Joist Cost Calculator
The cost difference between floor trusses, I-joists and sawn lumber.
Related guides
- How Far Can a Floor Joist Span?
Rough spans for 2x6 through 2x12, what changes them — species, grade, spacing, load — and why the span table is the only answer that counts.
More in Framing & Lumber Calculators
- Wall Framing Calculators (2 calculators)
- Roof Framing Calculators (2 calculators)
- Lumber Takeoff Calculators (3 calculators)
- Framing & Lumber Calculators (9 calculators)