Unit systems

Every worksheet has one unit system. It controls how results are shown. The numbers and units you typed stay as you entered them.

Where to change it

On the Home tab, the System group has a control labelled Units:

• SI (m, kg, s) — the default for a new sheet.
• USCS (ft, lb) — foot–pound display (ft, lb, psi, and related units).
• CGS (cm, g) — centimetre–gram–second display.

The status bar on the right repeats SI, USCS, or CGS. That label is display only — change the system from the Home dropdown, not the status bar. The Document tab does not have this control.

What changes

When you pick a system, Calculeaf saves it on the worksheet and runs Evaluate All. A length entered as 4 m is still four metres. On a USCS sheet the result chip may show the equivalent in feet. Forces, pressures, and energies follow the same rule.

to() and a pinned result-chip unit override the system for that one region.