Field math · Calculator

Tax Calculator

Add tax to a subtotal or reverse a tax-inclusive total for fast onsite estimates.

FreeReady now

Working calculator

Enter the known values. ShowSide validates them before running the calculation.

Saved on this device

Keep repeatable inputs on this device or create a link that another technician can open.

0 / 12

No presets saved for this tool yet.

The link contains input values only—not saved results or account data.

Favorites, recent tools, and presets stay in this browser on this device. Clearing site data removes them; account sync is not active yet.

Ready

Result

Enter values to calculate

Choose add or reverse tax, then enter an amount and tax rate.

Transparent math

Currency values round to the nearest cent after the tax calculation.
Reverse tax treats the entered amount as a tax-inclusive total.
The entered rate is supplied by the user; ShowSide does not determine jurisdiction or taxability.
The five most recent valid calculations stay on this device for fast offline reuse.

Loading workspace