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
Compute the volume of a lumber board in board feet, the standard unit for pricing and ordering wood in North America. Useful for budgeting projects, comparing lumber prices, and verifying supplier invoices.
Fill in the required fields to see your result.
Key differences
| Table Sag Calculator | Board Feet Calculator | |
|---|---|---|
| Category | Woodworking | Woodworking |
| Inputs required | 5 | 3 |
| Result | Expected Sag (inches) | Board Feet (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. | Compute the volume of a lumber board in board feet, the standard unit for pricing and ordering wood in North America. Useful for budgeting projects, comparing lumber prices, and verifying supplier invoices. |