Shop Calculator · iPhone and iPad
Wood Calc
Shelf sag, board feet, wood movement, moisture, segmented bowls and cut lists, in one app.
For hobby and small-shop woodworkers and turners who want one app for the numbers that come up at the bench.

Will this shelf sag?
Span, depth, thickness, species and load

Cut the segments for a bowl
Miter angle and segment lengths for any ring

Lay out your parts
Cut lists on sheets or boards, kerf taken out
The numbers at the bench.
- 01
Will this shelf sag?
How far a shelf will bow from its span, depth, thickness, species and load, with or without an edge band.
- 02
How many board feet am I buying?
Add up the lumber pile and what it costs. Fractions like 3/4 and 1 1/2 work.
- 03
How much will this panel move?
Seasonal growth and shrinkage across the width of a board, tabletop or panel, for your species.
- 04
What’s the moisture content in my shop?
The moisture content wood settles at in your shop’s temperature and humidity.
- 05
How do I cut the segments for this bowl?
Ring, sphere and lathe speed, plus a bowl designer that works out every ring at once.
- 06
What angle for a hexagon box?
The Ring calculator with no allowance gives the saw setting and side lengths for a polygon box, frame or planter.
- 07
How do I lay out my parts on a sheet?
A cut list optimizer for sheets and boards, with your blade’s kerf taken out of every cut.
Free to start.
Free
- Shelf sag, board feet, moisture and wood movement
- Ring, sphere and lathe speed
- The bowl designer, up to 4 rings
- Cut lists, up to 8 parts per project
Wood Calc Pro
- Everything in Free
- Unlimited rings in the bowl designer
- Unlimited parts in every cut list
One-time purchase. No subscription, no account.
Shop Pass