# Creating new formulas

If you can’t find the formula you need, you can create a new one.

Note

You can only create one completely new formula at a time. Save any new formulas before creating more. If you don’t, the behavior is undefined.

## Formula math editor

Palette bla bla

## Formula terms: variables and constants

The terms in a formula may be either physical or mathematical **constants** such as *g* (standard gravity) or **variables**, whose value is supplied when using the formula in the Solver.

You supply information about the terms - whether it’s a variable or constant, or the term’s units - in the **terms table**, found just below the formula math editor.

### Variables

#### Alternate/enhanced variable names

When entering variable names in the formula math editor, you’ll run into several limitations. For example, a variable name such as *t*_{1/2} (half-life) can not be entered directly into the formula editor: 1/2 would actually end up getting calculated, i.e. you’d end up with either an unexpected division by two or just a garbled formula.

In situations like these, you can “override” the name provided in the math editor. In the example just mentioned, just provide *t* in the math editor, and enter *t* _{1/2} into *t*‘s **alt name** field in the terms table.