Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Woodworking
Table Sag Calculator
Estimates the mid-span deflection of a table top or shelf under a given load using beam-bending theory. Use it to verify that your chosen wood thickness won't visibly sag under typical weight.
Fill in the required fields to see your result.
Woodworking
Board Feet Calculator
Calculates the total board feet of lumber needed for a woodworking project, including a waste factor. Use it when buying timber at the lumber yard or estimating material costs.
Fill in the required fields to see your result.
Key differences
| Table Sag Calculator | Board Feet Calculator | |
|---|---|---|
| Category | Woodworking | Woodworking |
| Inputs required | 5 | 5 |
| Result | Expected Sag (inches) | Total Board Feet Needed (bf) |
| What it does | Estimates the mid-span deflection of a table top or shelf under a given load using beam-bending theory. Use it to verify that your chosen wood thickness won't visibly sag under typical weight. | Calculates the total board feet of lumber needed for a woodworking project, including a waste factor. Use it when buying timber at the lumber yard or estimating material costs. |